[00:01] <NormanOK> his balloons looked pretty big, but their float altitude were all below 10km. I am confused with that.
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[00:06] <Flerb__> ordered TI samples early this morning
[00:07] <Flerb__> they were in the country by 19:00
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[00:13] <NormanOK> that's pretty fast. may I ask what you ordered?
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[00:21] <Flerb__> NormanOK: a "LSF0204PWR-4-Bit Bidirectional Multi-Voltage Level Translator for Open-Drain & Push- Pull"
[00:22] <Flerb__> I also ordered (today) a CC1110F32RHHR
[00:22] <Flerb__> which seems awesome but perhaps a bit complex to be fiddling with just yet
[00:22] <Flerb__> and a LMT87LP-LMT87 temp and sensor
[00:22] <Flerb__> and a HDC1000YPAT
[00:23] <Flerb__> and a TPS92661QPHPRQ1-High-Brightness LED Matrix Manager for Automotive Headlight Systems.
[00:23] <Flerb__> i have no idea either
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[00:27] <NormanOK> Flerb__: nice, are they free? Maybe I should check out their transceiver chips. I've been struggling to find a good radio for my payload here in the US. what radio do you guys often use to transmit at two different frequencies (aprs + 1)?
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[01:08] <NormanOK> what radio do you guys often use to transmit at two different frequencies (aprs + 1)?
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[02:08] <mheld> anybody here use any quectel gsm/gps modules?
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[02:15] <Ian_> The general expertise is in bed. best to call back around 0900z
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[03:31] <Flerb__> NormanOK: they are
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[04:56] <SpacenearUS> New vehicle on the map: 03BLNTME-1 - 12http://tracker.habhub.org/#!qm=All&q=BLNTME-1
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[08:47] <Vaizki> top of the morning to all and sundry
[08:50] <fsphil> morning
[08:51] <fsphil> anything flying this weekend?
[08:52] <daveake> calendar says ohup_launch_2 tomorrow morning in spain
[08:58] Action: mfa298 suspects that also won't get into range for fsphil :p
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[09:04] <fsphil> sadly not
[09:05] <fsphil> never know, sporadic-e can happen :)
[09:06] <SpeedEvil> Unless you synthesise it yourself.
[09:11] <Vaizki> so VENUS1-3, tracking on APRS nicely but who's receiving it? aprs.fi shows VENUS1 which has a locator in Nebraska.. sounds like a HF tracker being gateway'd onto APRS?
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[09:39] <Vaizki> wow raspi2 price already went up +50% in some local electronics shops because they sell all they can get
[09:40] <Vaizki> crazy demand, I guess everyone needs 3 media players or something
[09:40] <Vaizki> and they need them NOW
[09:41] <daveake> I have 4 ... maybe I should sell some :p
[09:42] <craag> anyone know what the lead time is on them for farnell?
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[09:45] <daveake> Well mine were from CPC aka Farnell Lite, and arrived inside 1 week
[09:45] <Zeusking19> I believe Farnell is delivering within 2 weeks
[09:45] <craag> Hmm will have to order some and see then :)
[09:45] <Zeusking19> CPC may be quicker
[09:46] <craag> k, thanks
[09:47] <Zeusking19> Just checked, Farnell lead time is 2 weeks
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[09:58] <SpeedEvil> Vaizki: If 10% people upgrade, that is 300k
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[09:59] <daveake> More than that ... they've sold over 5M now
[09:59] <Vaizki> I went to a local store last week and they had 57 of them in stock at 40.30 euros incl. 24% vat
[09:59] <daveake> and 10% is about right as they've sold 500k V2s
[09:59] <Vaizki> now everyone is out
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[10:05] <anerdev> hey guys =D
[10:06] <mfa298> Vaizki: not everyone upgrades, I still have an original Model B Rev 1 as a media player (as they say 256MB is more than enoguh)
[10:06] <SpeedEvil> Vaizki: Sure - 10% as a prompt upgrade isn't quite an insane figure.
[10:06] <SpeedEvil> mfa298:
[10:07] <SpeedEvil> Especially if you count people purchasing for the first time on teh back of the announce
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[10:17] <Geoff-G8DHE-M> lz1dev, What are the little pentaganel cloud icons that are clickable on the map ?
[10:19] <Geoff-G8DHE-M> Ah refreshed and they have gone ...
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[10:49] <infaddict> ooh i now have LED's on my flight computer ;-) Nothing better than some flashing lights haha.
[10:49] <Zeusking19> flashyflashy
[10:50] <infaddict> cant find any info on my led's however (they came in a pack of other stuff). so assuming a 2V forward voltage and 20mA current.
[10:50] <infaddict> using a 50 resistor and seems to work
[10:50] <SpeedEvil> measure the Vf
[10:50] <SpeedEvil> with the 50R resistor
[10:50] <infaddict> yer was gonna ask about that - so i just DMM the voltage
[10:50] <SpeedEvil> but 50R at 5V is safe
[10:50] <SpeedEvil> yes
[10:50] <infaddict> its 3.3V
[10:50] <SpeedEvil> err
[10:51] <SpeedEvil> ignore that
[10:51] <SpeedEvil> 3.3*20 is unconditionally safe
[10:51] <infaddict> 3-3-2 / 0.026
[10:51] <infaddict> = 26mA
[10:51] <infaddict> sry = 50 resistor
[10:51] <infaddict> yep agreed probably too safe
[10:51] <infaddict> dont have anythign lower than 50 in my box
[10:51] <infaddict> will order some new bits for real board tho
[10:52] <SpeedEvil> 50 ohm is a little low
[10:52] <SpeedEvil> for red LEDs
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[10:52] <infaddict> ok i have 100's
[10:55] <infaddict> guess if i measure the voltage i can plug that into the calculation and get much better idea. but what current should i be aiming for on red led's?
[10:55] <infaddict> no datasheet with these
[10:55] <infaddict> 40mA is max on my I/O so i was thinking 20
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[10:58] <infaddict> (3.3V - 2V) / 0.02 = 65ohm resistor. Thats assuming 2V fwd voltage. I'm new to this so someone pls correct me if I am wrong.
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[11:00] <SpeedEvil> 20mA is readonable for all LEDs
[11:00] <SpeedEvil> Except tiny surface mount ones or ones costing over 10 dollars per
[11:02] <infaddict> ok great and also safe for my arduino 40mA limit too
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[11:04] <infaddict> Georg Ohm was pretty clever ;-)
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[11:15] <SpeedEvil> Arduino does not have a 40mA limit
[11:15] <SpeedEvil> that is a misinterpretation of the datasheet.
[11:15] <SpeedEvil> That's absolute maximum - at which the device is probably not going to die in10 seconds.
[11:16] <SpeedEvil> It may not work, and may be somewhat damaged afterwards
[11:16] <SpeedEvil> In addition, there are limits on total current out
[11:16] <infaddict> yes i believe i am well below maximum, even with GPS in full swing
[11:31] <Vaizki> umm you are not drawing power to the GPS from a pin on the 328p?
[11:31] <Vaizki> + "I hope"
[11:36] <daveake> Some confusion here I suspect :)
[11:36] <daveake> There's a limit on draw from the 3V3 regulator.
[11:36] <daveake> And there's a max current draw from an I/O pin
[11:37] <daveake> GPS is the former and LED the latter (I hope!)
[11:38] <infaddict> indeed. i am using the arduino 3v3 clean vcc output to power all my sensors and GPS at the moment. i am well below the max draw of the arduino. my question was on the digital IO pin connected to my LED/
[11:38] <infaddict> i thought using 3.3v clean vcc from arduino was very sensible as most of my sensors are 3.3v and require nice clean voltage. my batteries are 6V.
[11:38] <daveake> TBH is plenty on most modern LEDs
[11:38] <daveake> +5 mA
[11:39] <infaddict> sry dave what is TBH?
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[11:40] <SpeedEvil> to be honest
[11:40] <SpeedEvil> Unless you actually need visibility in sunlight - modernLEDs tend to be much brighter than they were inthe 80s
[11:40] <infaddict> ah lol right thought it was some electronic speak
[11:41] <SpeedEvil> Inprinciple, I should go and see if I can find a 90s maplin catalog, and find out mcd ratings of cheap LEDs
[11:41] <SpeedEvil> And compare with the cheapest today
[11:41] <infaddict> Vaizki: what is your concern with drawing GPS power from 328p board?
[11:42] <Zeusking19> Just ordered an Arduino Uno from Farnell, planning on buying a NTX2 and UBLOX breakout as well from HABSupplies
[11:43] <infaddict> nice one Zeusking19. same setup as me ;-)
[11:43] <Zeusking19> ;0
[11:43] <Zeusking19> :)*
[11:43] <Vaizki> infaddict, you mean drawing power from Uno board? I guess that's ok
[11:43] <infaddict> correct
[11:43] <Vaizki> drawing it from a GPIO pin is not
[11:43] <infaddict> i feed in unregulated raw battery and then hook into VCC (3.3v regulated) for all my powering
[11:43] <infaddict> for GPS and sensors
[11:43] <infaddict> but for LED i power via digital pin
[11:44] <Vaizki> did you mod your uno for 3.3v?
[11:44] <infaddict> sry i just re-read Zeusking19's post. mine is mini and not uno.
[11:44] <Zeusking19> Ah
[11:44] <Vaizki> ok so you have a 1117 LDO or something?
[11:45] <infaddict> no my mini is 3.3v
[11:45] <infaddict> they do a 5v and 3.3v version
[11:46] <Vaizki> I thought mini has no onboard regulator?
[11:46] <infaddict> mine does. mini pro 3.3v 8Hz.
[11:47] <Vaizki> so it has a usb power input?
[11:47] <infaddict> yes and raw from batteries
[11:47] <Vaizki> oh ok not a standard mini then
[11:47] <infaddict> well, the usb is via serial/usb header
[11:48] <Vaizki> url? :)
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[11:49] <infaddict> as i said mini pro
[11:50] <daveake> mini pro has a very good regulator
[11:50] <infaddict> https://www.sparkfun.com/products/11114
[11:50] <infaddict> yep outputting near perfect 3.3V for me dave
[11:51] <swaledale> Howdy all. N00b here. Just starting on the long journey to learning about HAB and wondering what to start with. Intend to do lots of playing and testing over the months and want to start with a ready made helper. i've seen Dave's Pi-in-the-Sky and also the Habduino - which do people think is a good place to start?
[11:51] <SpeedEvil> At the beginning.
[11:51] <SpeedEvil> swaledale: More seriously.
[11:52] <SpeedEvil> swaledale: Where are you, and what's your initial goal?
[11:52] <Vaizki> infaddict, ah ok well that's quite nice. I have some pro boards which are 5V and no regulator on them, they are close to useless
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[11:53] <Vaizki> especially since I don't intend to do 5V mcu's any more, I'm done with level shifting
[11:54] <swaledale> Hi, NW Uk at the moment soon to be Midlands. Initial goal is some quick wins to get me hooked, then probably try and do something new and build my own from scratch. Have a tech background etc.
[11:54] <Vaizki> building from scratch is a win
[11:55] <daveake> Some guy wrote this rather nice intro :p http://www.daveakerman.com/?p=1732
[11:55] <daveake> and that links to some UKHAS wiki pages on getting going with an Arduino / GPS / radio
[11:55] <swaledale> haha thanks Dave, I've done a load of reading and your intro was awesome, so learnt a lot already. I'm thinking a sort of parallel 'see it working' and 'pull it apart and build my own' approach
[11:56] <daveake> If you can wield a soldering iron and have some knowledge of C, you can get going pretty quickly
[11:57] <swaledale> Yeah, so soldering iron isnt a problem, programming hasnt been a strength tbh. But that's where I'm hoping to learn. So I guess thats what im wondering, is the Pi route or Arduino good for starting out with? Guess both have merits
[11:57] <daveake> Pi is nice to debug in - it's proper C not Arduino C, and you don't have the download step
[11:58] <daveake> If you're going to end up using the Pi for the flight (which would be because you want to transmit images) then start with that
[11:58] <mattbrejza> anything other than arduino is nice to debug in ;)
[11:58] <daveake> true :)
[11:58] <Vaizki> then again with pi you also need to know linux, it sucks up much more power etc.. :)
[11:59] <daveake> meh Linux is easy
[11:59] <swaledale> I love sparking these debates ;)
[11:59] <Vaizki> yes it's easy for me too
[11:59] <mattbrejza> pi doesnt have (many) proper embedded hardware peripherals
[11:59] <daveake> I know people complain about the power, but 4 AAs gives you 20 hours which is plenty for a regular flight
[11:59] <Vaizki> my answer would be.. both!
[11:59] <Vaizki> pi with arduino on top!
[12:00] <mattbrejza> http://uk.farnell.com/stmicroelectronics/stm32f030f4p6tr/mcu-32bit-cortex-m0-48mhz-tssop/dp/2432084 my answer
[12:00] <Vaizki> I would do a BBB tracker but the pi wins out because of the camera interface
[12:01] <daveake> Well Pi has i2c (which mostly works) and SPI, plus a fair few spare I/O pins, so it can cope with most things
[12:01] <swaledale> I like the idea of streaming the images, its got to be magic watching your first set come in right. So that will be a driver for doing it. I was leaning towards Pi because of the camera
[12:01] <daveake> The camera is a bit argument for using the Pi
[12:01] <daveake> possibly the only argument :)
[12:01] <daveake> s/bit/big/
[12:01] <Vaizki> mattbrejza, yes those are nice, it was my original plan also but decided to do at least a training-poc on avr
[12:02] <mattbrejza> poc?
[12:02] <Vaizki> proof of concept
[12:02] <daveake> c is next to v ?
[12:02] <daveake> oh
[12:02] <Vaizki> sorry work-speak
[12:03] <Vaizki> I want to know to get all the bits involved and 328p 8MHz 3.3V was easiest to start with
[12:03] <mattbrejza> not sure ill ever have a reason to go back to an AVR
[12:03] <Vaizki> I am avoiding all Arduino libs also if possible ;)
[12:03] <swaledale> so where is everyone based then? anyone near the NW?
[12:03] <infaddict> NE for me
[12:03] <infaddict> i guessed NW from your name ;-)
[12:04] <Vaizki> mattbrejza, have you built your own STM32 M0 modules for prototyping or using some devkit?
[12:04] <mattbrejza> you just wire them to 3.3V and they work...
[12:05] <Vaizki> swaledale, Finland .. so even more NE than infaddict
[12:05] <daveake> Upu is NW (Halifax)
[12:05] <Vaizki> mattbrejza, you just deadbug the TSSOP-20 onto a breadboard? :)
[12:05] <mattbrejza> pfft breadboard
[12:05] <mattbrejza> straight to pcb
[12:05] <daveake> We need a breadboardbot
[12:05] <infaddict> haha!
[12:06] <infaddict> nice
[12:06] <swaledale> aha, swaledale isnt necessarily linked to location, im nearer liverpool atm ;)
[12:06] <mattbrejza> i have some disco boards if anything needs testing beforehand
[12:06] <daveake> Standard reply being: "Someone mentioned breadboard - burn it!"
[12:06] <Vaizki> mattbrejza, well I'm not there yet :)
[12:06] <Vaizki> daveake, I know they have their problems but they exist for a reason :)
[12:06] <daveake> Yes, creating work for people here debugging someone's circuit
[12:07] <daveake> Really, solder the damn wires it'll take less time in the long run
[12:07] <mattbrejza> do people try to shove mutlicore wire in or something? i dont have issues with breadboards :/
[12:07] <Vaizki> well I promise not to create that kind of work.. I have no issues with breadboards either
[12:07] <Vaizki> at least not ones I can't debug myself...
[12:10] <SpeedEvil> If only streaming non postage-stamp images were easy and legal
[12:11] <infaddict> i love breadboard! agree soldering is quick but they allow me to try a lot of different situations quickly. sometimes connections can be flaky but knowing how to use a DMM solves all of them.
[12:12] <infaddict> for example, i had problems with large breadboard and parts not working. turns out the power rails didnt run all the way down the board, but were split into 3 parts. no markings at all to tell me that. i've put big black marker now!
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[12:12] <Vaizki> hmm those STM32 m0 discovery boards are quite cheap actually.. 8 euros including the ST-LINK/V2 side
[12:12] <mfa298> infaddict: as you move into faster signalling breadboard can cause more issues and the dmm on it's own may not show the full issue (capacitance and inductnace in the tracks can cause issues
[12:13] <Vaizki> but out of stock at mouser
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[12:13] <edmoore> farnell have some Vaizki
[12:13] <edmoore> not sure if you can use them where you are
[12:13] <Vaizki> wthey are a bit trickier to use
[12:14] <infaddict> thx mfa298 good info
[12:15] <edmoore> infaddict, i've certainly had crystals refuse to oscillate when in a breadboard
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[12:16] <edmoore> too much capacitance from the board itself (if you can visualise how they work, they're just parallel metal plates with an insulator in between, a bit like... a capacitor!)
[12:17] <mattbrejza> breadbaords just remove the need for hte load caps ;)
[12:17] <edmoore> well exactly
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[12:18] <gonzo_> and good groundplanes are good, usually
[12:18] <edmoore> better really to breadboard the old fashioned way
[12:18] <edmoore> a copper clad board
[12:18] <edmoore> some glue
[12:18] <edmoore> and dead-bug
[12:19] <SpeedEvil> That's not old fashioned.
[12:19] <SpeedEvil> Old fashioned is to use a proper breadboard.
[12:19] <SpeedEvil> With nails.
[12:19] <SpeedEvil> Or oak pegs, if really oldskool
[12:19] <edmoore> https://www.flickr.com/photos/mightyohm/6926146703/in/set-72157629444825281
[12:20] <edmoore> http://4.bp.blogspot.com/-4Z64F0xGSXI/UP3mHTdWT0I/AAAAAAAAArs/ck9XHuH_n-I/s1600/eep103.jpg
[12:23] Action: SpeedEvil sighs.
[12:24] <SpeedEvil> I can't find the site with someone making circuits using a pita bread as a breadboard
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[12:36] <infaddict> right so a diode check via DMM on my little LED shows 816. what does that mean?
[12:36] <infaddict> does that mean 0.816V to light it?
[12:36] <craag> 816 mV drop across the diode
[12:37] <craag> That's at very low current though
[12:37] <daveake> That's with a very low current
[12:37] <daveake> and if it was enough to light it, it would have lit it :)
[12:37] <infaddict> it did
[12:37] <daveake> Like I said they're very efficient these days :p
[12:38] <craag> Refer to the datasheet if you have one, but ~1.2V is normal at standard current.
[12:38] <mattbrejza> you can light an led by connecting one leg to gnd and touching the other leg
[12:38] <SpeedEvil> 1.9V is about the minimum for red LEDs
[12:38] <daveake> and remember that different colours have different curves
[12:38] <daveake> blue needs many volts
[12:38] <SpeedEvil> 0.8 only with IR
[12:38] <infaddict> so i'm still puzzled as to what voltage drop figure to feed into ohms law to get proper resistor value. should i use 0.816 from DMM or assume 1.2V norm? i have no datasheet as cheap led's bundled in a beginners pack.
[12:39] <infaddict> this is red led btw
[12:39] <SpeedEvil> infaddict: Find a 1K resistor.
[12:39] <daveake> What I do - have a guess, grab a resistor, try it, if too bright try a biffer one
[12:39] <daveake> bigger
[12:39] <SpeedEvil> infaddict: Connect between 5 and 0 in series witht he LED. Measure volts across LED
[12:39] <SpeedEvil> Now, consider if you actually need to go under 1K
[12:39] <edmoore> [12:38] <infaddict> so i'm still puzzled as to what voltage drop figure to feed into ohms law to get proper resistor value. should i use 0.816 from DMM or assume 1.2V norm? i have no datasheet as cheap led's bundled in a beginners pack.
[12:39] <SpeedEvil> because it may be bright enough
[12:39] <edmoore> easy peasy
[12:39] <edmoore> let's say you have 5V
[12:39] <edmoore> as your supply
[12:40] <edmoore> there's a drop across the led of say 1V
[12:40] <infaddict> thats the bit i dont know
[12:40] <infaddict> the drop
[12:40] <edmoore> you 'know' (if you had the datasheet) that the LED might want 10mA
[12:40] <infaddict> i know what to do maths wise once i have the drop
[12:40] <edmoore> oh fine
[12:40] <edmoore> ok
[12:40] <edmoore> well go with the dmm value (though again, 0.8V does seem a bit on the low side)
[12:41] <craag> Assume it's 1V. Calculate for 10mA. Try it and see what the drop is.
[12:41] <infaddict> sadly i dont know the mA either. i guessed at 20mA. and guessed at 2V drop for red led. that gave me roughly a 50ohm resistor. that works fine.
[12:41] <SpeedEvil> 0.8V is impossible for a visible LED
[12:41] <SpeedEvil> 0.9V or so is IR LEDs
[12:42] <infaddict> SpeedEvil: just going off what DMM said on its diode setting = 816
[12:42] <edmoore> i wonder if it's emitting on something else and using a flourescing coating to produce red
[12:42] <edmoore> like what white LEDs do
[12:42] <SpeedEvil> infaddict: yes - which is not accurate.
[12:42] <edmoore> infaddict, it really should have a unit
[12:42] <edmoore> on the diode setting
[12:42] <mattbrejza> sure it doesnt say .816?
[12:42] <edmoore> i wouldn't trust a multimeter that didn't give you an obvious unit
[12:42] <SpeedEvil> edmoore: flourescing works down in energy from the exciting.
[12:42] <edmoore> SpeedEvil, you're right
[12:42] <edmoore> i'll be quiet
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[12:43] <SpeedEvil> edmoore: you could in principle use a laser ofsome form and a frequency doubler - but...
[12:43] <craag> mattbrejza: Most give it in mV (both of mine do)
[12:43] <mattbrejza> mine doesnt actually say units iirc...
[12:44] <SpeedEvil> https://www.google.co.uk/search?q=c%2F%280.8+electron+volts+%2F+planks+constant%29&oq=c%2F%280.8+electron+volts+%2F+planks+constant%29&gs_l=serp.3..30i10.14147.16233.0.16457.
[12:44] <SpeedEvil> 1500nm light from 0.8V
[12:44] <infaddict> nope mine doesnt state units but no decimal point visible in read out
[12:44] <SpeedEvil> c/(1.9 electron volts / planks constant) that works surprisingly well
[12:44] <edmoore> well if you've got results you're happy with, i'd stick with that
[12:44] <SpeedEvil> 650nm for 1.9V
[12:44] <daveake> Got another DMM to measure that with? :)
[12:45] <infaddict> daveake: might have one in garage, will check later and try it
[12:45] <infaddict> so i have it wired up with 50ohm resistor for now, feeding in 3.3V. can i measure voltage between + in and ground?
[12:45] <edmoore> if you have a power supply with current limiting, se the current limit to say 10mA
[12:45] <edmoore> see what the voltage is
[12:46] <SpeedEvil> Most importantly - if using a variable PSU with current limiting - set the initial voltage to 0, connect the LED, and then ...
[12:47] <gonzo_> better still, put something like 1k in series on a variable voltage PSU and wind up the V till it lights. Then measure the Vdrop. From taht you can also calculate the I
[12:47] <SpeedEvil> Or as I said above - 1K in series with 5V, and measure the LED voltage and it'll work with every single visible single-junction LED
[12:47] <gonzo_> I doubt that any hobbiest bench PSUs will allow current limits down in the mA range
[12:48] Action: SpeedEvil looks at his hp6632B.
[12:48] <gonzo_> gonzo looks at the crappy chineese thing he has and hangs his head
[12:48] <SpeedEvil> (which I need to work out why it's got an 'err' light and is 8mA off the nominal current figure)
[12:49] <edmoore> i have a pair of 6632Bs too
[12:49] <edmoore> they are the bomb
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[12:49] <edmoore> unless yours has an error like speedevil's
[12:49] <edmoore> SpeedEvil, are your sense terminals definitely connected?
[12:49] <SpeedEvil> It's unfortunately opaque as to why it might do that.
[12:49] <edmoore> but anyway, if you tell it for 10mA, you get 10mA
[12:49] <edmoore> and they're on ebay for about £100 atm
[12:49] <SpeedEvil> edmoore: yes
[12:50] <edmoore> best psu/£ in the land
[12:50] <SpeedEvil> edmoore: they went up
[12:50] <edmoore> oh that's sad
[12:50] <infaddict> so it "works" with a 3.3V supply and 50ohm resistor... in that in lights up and flashes quite brightly. is that enough or should i measure something to get more accurate idea?
[12:50] <edmoore> still totally worth the money
[12:50] <infaddict> i dont have variable PSU sadly
[12:50] <edmoore> infaddict, if it works and you're happy then stick with it
[12:50] <edmoore> and consider getting yourself a lab psu :)
[12:50] <infaddict> edmoore: thx just concerned i am overloading something
[12:50] <infaddict> actually i have a DC that goes up in small increments to 12V but thats it
[12:51] <edmoore> you could put your meter inline to measure current
[12:51] <edmoore> check you're not using more than the per-pin recommendation for the micocontroller, if you're driving it from an arduino pin
[12:51] <infaddict> yep thats what i am worried about - my maths assumes a 2V drop and if thats wrong, could be overloading
[12:52] <infaddict> let me try inline current measurement
[12:52] <edmoore> you can do it to the arduino itself rather than just in the led circuit
[12:52] <edmoore> because multimeters in current measurement mode have a voltage drop across them aswell
[12:53] <edmoore> which would affect your readings here
[12:53] <edmoore> e.g. my fluke87 has 1.8mV/mA drop in mA mode
[12:53] <infaddict> so between which connections should i go inline?
[12:53] <edmoore> i'd do it before the onbaord regulator of the arduino
[12:54] <edmoore> so that the regulator will still keep producing 3.3V despite being fed with a slightly lower voltage
[12:54] <edmoore> i.e. measure the whole arduino current consuption and just see how much it goes up when you turn the led on
[12:55] <infaddict> ok im usb powered at moment as debugging. i therefore power everything from VCC out (3.3V) on arduino. so how can i measure BEFORE the onboard regulator?
[12:56] <edmoore> might be hard as you can't really get inline between your usb power cable and the arduino
[12:56] <edmoore> ok so maybe go with just inline in the led circuit, but remember to factor in the voltage drop from your multimeter
[12:57] <edmoore> you can look up what it is in the spec sheet
[12:57] <infaddict> i could switch to powering arduino from battery (into raw pin) if that helps
[12:57] <edmoore> but tbh if it's only gonna be like 10mV then who's counting
[12:57] <edmoore> yes it probably would help
[12:57] <edmoore> into the raw power in
[12:57] <edmoore> that would do it
[12:58] <infaddict> then measure current inline between which points?
[12:58] <edmoore> the supply coming into the arduino
[12:59] <edmoore> battery---multimeter---arduino---back to battery
[12:59] <infaddict> got it, doing that now thx
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[13:17] <Zeusking19> How would you guys suggest powering an Uno in a HAB?
[13:19] <Zeusking19> Something like this: http://www.miniinthebox.com/6-aa-battery-holder-battery-box-with-9mm-solder-dc-power-plug-for-arduino-201211270080004_p478873.html?currency=GBP&litb_from=paid_adwords_shopping&gclid=CjwKEAiA05unBRCymrGilanF9SwSJACqDFRmONYHoz9laxoMvPO8evsJ74KVDBLvOwi7MCZrt_RJUxoCBlPw_wcB and then fill that with lithium energizers?
[13:21] <infaddict> yep lithium energizers are peoples choice due to good low temperature performance. http://data.energizer.com/PDFs/l91.pdf
[13:21] <infaddict> your Uno is 5V right?
[13:21] <Zeusking19> yep
[13:22] <infaddict> it will have a recommended input voltage range too
[13:22] <infaddict> sometimes higher than 5V
[13:22] <Zeusking19> "Input Voltage (recommended) 7-12V"
[13:23] <infaddict> 6 x 1.5AA in series will give you 9V input to it. but remember new batteries often output slightly higher so need to be within Uno limits. they also degrade over time as they wear out so need to watch bottom end too.
[13:23] <infaddict> e.g. might output 9.5V when new
[13:23] <Zeusking19> hm
[13:23] <infaddict> so still well within limits
[13:23] <daveake> They start at 1.83 ish
[13:23] <Zeusking19> Uno has 20V tolerance
[13:23] <Zeusking19> so 8 Lithium Energizers, how would that work?
[13:24] <Zeusking19> Considering weight as well?
[13:24] <Zeusking19> AA type
[13:25] <infaddict> you are at top end of recomended voltage (12V) but still within limits
[13:25] <Zeusking19> Alright
[13:25] <infaddict> in terms of how long your batteries last, assuming wiring in series, L91's have 3000mAh output so you need to add up all the current draw in your circuit to get an idea.
[13:25] <infaddict> if you are buying off the shelf tracker, it should state a current requirement in datasheet
[13:25] <Zeusking19> I'll probably just use 6 AA's, and then it's within recommended
[13:26] <SpacenearUS> New position from 03KF5PGW-1 after 0315 hours silence - 12http://tracker.habhub.org/#!qm=All&q=KF5PGW-1
[13:26] <infaddict> if building your own you can estimate by adding up the current draw of each component
[13:26] <Zeusking19> alright
[13:26] <mattbrejza> youd be better off running it at 3.3V...
[13:26] <infaddict> plus measuring it for real, and doing battery tests of course
[13:27] <infaddict> mattbrejza: can you run an Uno at 3.3V?
[13:27] <mattbrejza> you can run an avr at 3.3V
[13:27] <mattbrejza> are tehre any 3.3V unos?
[13:27] <mattbrejza> cant see why not
[13:27] <mattbrejza> well...
[13:27] <Zeusking19> Any thoughts of this?: http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=68
[13:28] <infaddict> yep Vaizki just bought one and I have very similar model, just different antenna
[13:28] <infaddict> more that suitable for HAB and other needs
[13:28] <Zeusking19> okay
[13:28] <Vaizki> infaddict, sorry bought what?
[13:28] <Zeusking19> Seems I am on the right track then
[13:28] <Vaizki> oh o
[13:29] <infaddict> M8Q ublox
[13:29] <infaddict> see linky
[13:29] <Vaizki> I bought a GPS yes but not that model
[13:29] <infaddict> ah sry i thought u said that one
[13:29] <Vaizki> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=51
[13:29] <Vaizki> got that one because I'm at 3.3V
[13:29] <Zeusking19> Ah, fair enough
[13:29] <infaddict> that one is 3.3V tho
[13:29] <infaddict> sry got confused
[13:29] <infaddict> your original link Zeusking19 is 5V which is what you want
[13:30] <Zeusking19> Yes.
[13:30] <infaddict> there's a comparison table of differnet models on hab site
[13:30] <Vaizki> if you have a uno yes you want the 5V module
[13:30] <infaddict> http://ava.upuaut.net/store/index.php?route=product/category&path=59_60
[13:30] <infaddict> So for a 5V solution thats the only one i think
[13:32] <infaddict> note that that GPS by default uses serial for TX and RX. I believe the Uno only has 1 serial and you might be using that for debug/program transfer.
[13:32] <Zeusking19> And also, for breadboarding, that SMA connector would you recommend?
[13:32] <daveake> 5V should have died with TTL
[13:32] <daveake> Shame that most Arduino boards still use it
[13:32] <Zeusking19> breadboard/perfboard
[13:32] <infaddict> there is a note on hab site that SDA/SDL (for i2c instead of serial) can be soldered for small cost. something to bear in mind.
[13:32] <Zeusking19> alright.
[13:33] <Zeusking19> Where does it say that, out of interest?
[13:33] <Vaizki> umm the module Zeusking19 linked has ready headers for SCL/SDA
[13:33] <Zeusking19> ^
[13:33] <Vaizki> or holes
[13:34] <Vaizki> ah We can fit an additional level conversion chip to level convert SCL/SDA on request (additional charge) but by default SCL/SDA are NOT connected.
[13:34] <Vaizki> my bad
[13:34] <Zeusking19> hm
[13:34] <Zeusking19> If I put in the logic level convertor, will that stop the serial from working?
[13:34] <Vaizki> it's the empty footprint right above the SCL/SDA holes
[13:34] <Vaizki> no
[13:34] <Zeusking19> Alright.
[13:35] <Zeusking19> I wonder when they say it is additional charge, how much of an additional charge it ia
[13:35] <Zeusking19> it is*
[13:35] <infaddict> nope you can use both serial and i2c if you really needed to
[13:35] <infaddict> you can config the GPS to do either or both
[13:35] <Zeusking19> alright
[13:35] <Vaizki> if you look at the board in the picture, from left: empty place for I2C level converter, populated serial level converter, capacitor, regulator, capacitor
[13:35] <Zeusking19> Yes
[13:36] <Zeusking19> It's worth the slight extra cost just to get a little bit more compatibility
[13:36] <infaddict> Upuwork can probably help on the costing. he may respond here or in a private chat, or he might prefer you to email him
[13:36] <Zeusking19> Alright.
[13:37] <Zeusking19> In regards to breadboarding and antenna connectors
[13:37] <Zeusking19> Which one would work best?
[13:37] <Vaizki> you don't want to run the antenna through a breadboard I'd say
[13:37] <infaddict> you dont even need an antenna to test radio over tiny distances if using NTX2B
[13:37] <Vaizki> if it's only for testing, ... as infaddict said ;)
[13:37] <Zeusking19> Fair enough
[13:38] <Zeusking19> I am looking into just using perfboard for first flight
[13:38] <Laurenceb> http://www.st.com/web/en/press/p3662
[13:38] <Zeusking19> So for that, which connector would be best?
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[13:42] <Vaizki> Zeusking19, based on the eagle parts the end launch SMA connector (which attaches to the edge of the PCB) should work for 2.54mm pitch perfboard as well
[13:43] <Zeusking19> http://ava.upuaut.net/store/index.php?route=product/product&path=71_66&product_id=74?
[13:43] <Vaizki> yes, but upu can confirm that if you talk to him about the i2c level converter
[13:43] <Zeusking19> Alright.
[13:43] <infaddict> i have same connector for when i build my board
[13:44] <Vaizki> I have those also but not here
[13:44] <infaddict> for PCB, not sure about perboard tho
[13:45] <Vaizki> well in eagle it looks like it has 5.1mm spacing between the ground pins and the center pin is .. well centered.. between them
[13:46] <mattbrejza> most hole mount coax connectors can be made to fit in stripboard with a dremel
[13:46] <adamgreig> s/hole mount coax connectors/things/
[13:46] <adamgreig> s/stripboard/other things/
[13:47] <daveake> :)
[13:47] <mattbrejza> things can be made to fit in other things with a dremel
[13:48] <adamgreig> most things ;)
[13:48] <SpacenearUS> New vehicle on the map: 03N8VRN - 12http://tracker.habhub.org/#!qm=All&q=N8VRN
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[13:59] <Vaizki> btw, do you veterans use lacquer/epoxy or something to protect ready pcb's from moisture?
[13:59] <Vaizki> aka seawater
[14:01] <edmoore> yes
[14:02] <gonzo_> usually if it gets into the sea, it's lost anyway. Some noteable exeptions
[14:02] <edmoore> acrylic protective laquer from, i think, electrolube
[14:02] <edmoore> it's useful for environmental protection anyway, regardless of sea
[14:02] <edmoore> condensation and so on
[14:03] <gonzo_> RS, removeable conformal coating is my usual choice (as I won a can from a work's clear out)
[14:04] <Zeusking19> Edmoore, now you mention Electrolube, I just found a packet of polyurethane resin
[14:04] <edmoore> they make a lot of useful products
[14:04] <edmoore> i think my flux pen i normally get is theirs too
[14:04] <edmoore> anyway, i am off now for a couple of weeks
[14:04] <Zeusking19> cool
[14:04] <edmoore> ttfn
[14:05] <Zeusking19> Is anyone here actually a member of element14, considering how often Farnell is brought up?
[14:05] <adamgreig> APL is great fun
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[14:09] <Vaizki> seems like Plastik 70 is easily available here, I guess it's pretty equivalent?
[14:09] <Vaizki> http://www.farnell.com/datasheets/318249.pdf
[14:12] <craag> Zeusking19: I think a few people have probably signed up for the technical library stuff - but I don't use it much any more.
[14:16] <Zeusking19> :)
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[14:19] <Vaizki> I think the element14 site is too confusing to invest time in trwaling through it.. if it comes up as a google hit, sure..
[14:27] <craag> Mm, I used to use their eagle footprint libs - but have learnt better since :)
[14:27] <adamgreig> haha
[14:27] <adamgreig> yea... now I use kicad ;)
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[14:48] <Vaizki> I think the first 4 people giving me advice all said 'eagle' so I never even looked at the others.. :P
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[14:48] <Vaizki> although I saw a video on kicad push & shove which looked very neat also with all the labels on the traces etc
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[14:50] <mfa298> adamgreig: have you found any good sites for kicad schematic libraries/ foot prints etc or do you just create any you need yourself
[14:51] <adamgreig> there are a load that I've seen around the internet but I always create them myself
[14:51] <adamgreig> I find a) it's pretty quick b) I can trust it more
[14:51] <adamgreig> the worst thing is relying on some random shit's footprint and that breaking your board
[14:52] <adamgreig> and I've had broken footprints in eagle libs, sparkfun libs, farnell libs, kicad's included libs, etc
[14:52] <adamgreig> it's just not worth it for the time it takes to do it properly yourself
[14:52] <adamgreig> and by now I have enough parts that I've used in practice and know are good that I don't have to make many new things each time anyway
[14:53] <mfa298> I've only really used it for schematics so far, but editing an existing part to make a new one seemed pretty simple
[14:53] <adamgreig> it's not an ideal situation, sure, I'm duplicating someone else's effort and ideally we'd have one reputable and trusted central repository
[14:53] <adamgreig> but in practice I am responsible for the things I make
[14:53] <adamgreig> and it ends up being more reliable for me to make things from scratch than carefully vet someone else's design
[14:53] <adamgreig> yea, the schematic symbol editor is incredibly easy
[14:54] <adamgreig> and the way that kicad separates schematic symbols from pcb footprints means you can easily do the whole schematic before worrying about footprints, which is nice
[14:54] <adamgreig> the footprint editor is also easier to use quickly than eagle, I found
[14:54] <adamgreig> a few neater options for putting things where you want them
[14:54] <adamgreig> still doesn't support drawing arbitrary constraints unfortunately
[14:56] <mfa298> I've not really used eagle in anger either, so I decided to go with kicad first - partly as it's also for work which likes open source and doesn't like spending money
[14:57] <adamgreig> having used both for a reasonable number of reasonably complex boards, I hugely prefer kicad
[14:57] <adamgreig> the fact that anything I create can be opened by anyone else for free is also a selling point
[14:57] <adamgreig> and CERN's recent work on it has made it a lot better too.
[14:58] <adamgreig> a lot of new features I've not had time to mess with yet - like you can now use a git/github repo as your library source
[14:58] <adamgreig> allowing you to point kicad on all your PCs to one github repo and manage footprints there and just update it as you want
[14:58] <adamgreig> which seems very nice
[14:59] <mfa298> oooh, I ought to play with that - although I probably need to practice a bit more at schematic symbols and foot prints
[14:59] <nats`> adamgreig on what version of kicad are you working ?
[15:00] <adamgreig> nightly
[15:01] <Vaizki> :)
[15:01] <mfa298> if you want to use kicad you really want one of the very recent builds, not what you get with a distro
[15:01] <nats`> mfa298 I use it since 2008/9
[15:01] <nats`> and I wouldn't advice to take the more recent but it depends on what you expect
[15:02] <nats`> I'm waiting they fix their file format
[15:02] <nats`> sonn to be released cern version could help on that point
[15:02] <nats`> ok I stay in 2013 version for now
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[15:34] <anerdev2> hi guys
[15:34] <anerdev2> anyone ?
[15:34] <craag> o/
[15:34] <R34lB0rg> hi anerdev2
[15:34] <anerdev2> hi
[15:34] <anerdev2> I have a question about the string
[15:35] <anerdev2> I need to put exactly like this: $$CALLSIGN,sentence_id,time,latitude,longitude,altitude,optional speed,optional bearing,optional internal temperature,*CHECKSUM\n
[15:35] <anerdev2> ?
[15:35] <anerdev2> because for example optional bearing I not use
[15:35] <craag> that's why it's marked 'optional'
[15:36] <craag> YOu can put whatever you want in there
[15:36] <anerdev2> uhmm, ok
[15:37] <anerdev2> because my string is like: $$ASSM1,6,15:30:31,0.000000,0.000000,0.000000,17,O*E234
[15:37] <anerdev2> and dl-fldigi don't recognize
[15:37] <anerdev2> it only say: callsign and checksum "good"
[15:37] <craag> but habitat needs: '$$',callsign, sentence id, time, lat, lon, '*', checksum and '\n'
[15:38] <anerdev2> o
[15:38] <craag> by 'dont recoginize'
[15:38] <craag> what do you mean?
[15:38] <anerdev2> I put '*'
[15:38] <anerdev2> craag I mean that in the top, where there are the field Time, Altitude and other, there isn't the data
[15:38] <anerdev2> but now I'm putting '*'
[15:39] <craag> Ok, that's never worked for any of my formats
[15:39] <craag> getting habitat to recognise it is the important thing
[15:39] <craag> (with a payload doc)
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[15:41] <anerdev2> craag this is my code for send the string: http://pastebin.com/unT0bDKB
[15:41] <craag> That string you posted looks good
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[15:41] <craag> other than the fact it doesn't have a valid position
[15:42] <anerdev2> yes, is all 0 because the gps doesn't work for now
[15:42] <craag> Code looks fine
[15:42] <mattbrejza> not sure you need altitude to the micrometer
[15:42] <craag> heh yes, have altitude as an integer
[15:43] <craag> signed integer!
[15:43] <mattbrejza> signed 32bit integer
[15:43] <craag> int32_t
[15:43] <anerdev2> o
[15:43] <craag> I use ubx and so send the lat, lon as integers as well
[15:44] <anerdev2> I need to put the altitute like int ok
[15:44] <anerdev2> craag watch there: http://imgur.com/vn6gdgs
[15:44] <Flerb__> TI sent me a "bank remittance" to some japanese company
[15:45] <Flerb__> i'm not sure if they just stuck random documents in there to pad it out
[15:45] <Flerb__> but this is an invoice
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[15:45] <craag> anerdev2: I'm not sure if those fields require a valid payload doc to work at all
[15:45] <craag> So don't worry about them
[15:45] <craag> jsut worry about getting on snus
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[15:46] <craag> put some fake gps data in for now
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[16:13] <anerdev2> craag I'm resolving the problem with gps hihihi
[16:15] <Geoff-G8DHE> very consistent tracking data for this Venus1-3, it launched from KF5KMP do we have any info ?
[16:17] <Mark_B> Good afternoon
[16:18] <Mark_B> I'd like to test a payload tomorrow, is that OK?
[16:18] <SpacenearUS> New vehicle on the map: 03NM5SS-6 - 12http://tracker.habhub.org/#!qm=All&q=NM5SS-6
[16:19] <Geoff-G8DHE> Normally a good idea ;-)
[16:20] <Mark_B> I've checked the mailing list and it doesn't look like anyone else is planning a launch, I'm looking to take th epayload for a drive around th eblock between 1000-12000
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[16:20] <SpacenearUS> New vehicle on the map: 03NM5SS-10 - 12http://tracker.habhub.org/#!qm=All&q=NM5SS-10
[16:20] <Geoff-G8DHE> I suspect habitat will cope with that ;-0
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[16:23] <Mark_B> Thanks Geoff
[16:24] <Mark_B> Winds permitting, I hope to launch 28 Feb
[16:24] <Geoff-G8DHE> Ah sound good
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[16:24] <Geoff-G8DHE> which callsign will you be using ?
[16:25] <Mark_B> MM3
[16:25] <Geoff-G8DHE> will keep an eye open for it
[16:25] <Mark_B> I've flown MM, MM2 before
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[16:26] <Mark_B> Tanks, open eyes and crossed fingers are very welcome :)
[16:26] <Geoff-G8DHE> Mind the trees, there strong attractors !
[16:27] <Mark_B> haha yes. Thankfully, there are usually some pubs close by too
[16:28] <Geoff-G8DHE> Good idea to check for liquid immersion as well ;-)
[16:28] <Mark_B> I forget whether I fed back what happened with that launch
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[16:29] <Geoff-G8DHE> http://360.g8dhe.net/HAB_Flights/2014_Flights/MM2_20141122/
[16:29] <Geoff-G8DHE> http://360.g8dhe.net/HAB_Flights/2014_Flights/MM_20141108/
[16:29] <Mark_B> In essence I built MM's reflector from material which soaked up every drop of water within a mile - it got heavier and sank ;(
[16:30] <Mark_B> MM2 was built from resin which worked very well
[16:30] <Geoff-G8DHE> Ah nyes that was a rather low height flight!
[16:30] <Mark_B> Thanks for the links
[16:30] <Mark_B> Yep, but it flew. And I learned lots
[16:31] <Mark_B> And the beer was good :)
[16:31] <Geoff-G8DHE> If I'm around I stick up what I see/hear if possible :-)
[16:31] <Mark_B> Ack, thnx.
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[17:09] <Zeusking19> A very random question: What are ways to convince your parents that HAB is a good learning activity and that I am not totally crazy for wanting to send something to near space?
[17:10] <stilldavid> show them the pictures :)
[17:11] <Zeusking19> Will do :P
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[17:21] <Geoff-G8DHE> Explain the need to understand Radio - Amateur Radio licence acquisition etc.
[17:21] <Geoff-G8DHE> Need to learn and be competent at programming
[17:22] <Geoff-G8DHE> understand saftey of using gases, flying objects.
[17:22] <R34lB0rg> Zeusking19, you have to learn a lot in multiple disciplines
[17:22] <R34lB0rg> physics, electronics, geography
[17:23] <Zeusking19> Right. :)
[17:35] <R34lB0rg> and getting from near space to space is probably one of the greatest frontiers left to humanity
[17:35] <lz1dev> i thought is space to deep space
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[17:38] <Zeusking19> Trouble is my parents are not easily convinced so it'll take a lot of effort :P
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[18:04] <fxmulder> getting to near space is easy, getting to space is not
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[18:15] <Laurenceb> getting to 100km is a fun challenge
[18:22] <SpeedEvil> :)
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[18:32] <Zeusking19> I will probably build a tracking board and demonstrate it to my parents - just so they know I am not completely crazy
[18:32] <Ian_> Zeusking19, Perhaps you need to demonstrate some early steps that will convince your folks that you are able to achieve the early programing . . . See you are thinking right already
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[18:33] <Zeusking19> Now I think about it, is there anything I can get started on in regards to a payload before I have hardware?
[18:33] <Ian_> Ask them what they would have you do with your time . . . pointing to crowd of kids hanging about on the corner
[18:33] <Zeusking19> In my case it would be building a HAB or sitting on a computer all day
[18:33] <Zeusking19> :P
[18:34] <Ian_> If you have an Arduino or similar, you can work on some of the code sections that you will require.
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[18:35] <Zeusking19> I should have an Arduino by Sunday/Monday, hopefully
[18:35] <Zeusking19> That's if Farnell's Next Day is truly next day :P
[18:35] <Zeusking19> Being Friday I doubt it
[18:36] <Zeusking19> Hm, according to the Farnell site it should be here tomorrow, apparently
[18:36] <Zeusking19> That's great :)
[18:38] <Zeusking19> May I ask, which code sections can be worked on without the hardware?
[18:38] <Zeusking19> I am aware that a lot of it requires it,.
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[18:41] <Ian_> I use http://www.ebay.co.uk/itm/Arduino-UNO-Rev3-R3-328-ATMEGA328P-Mini-Board-with-Free-USB-Cable-UK-/171052169601?pt=LH_DefaultDomain_3&hash=item27d380f981
[18:42] <Zeusking19> Yes, I ordered an Uno.
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[18:44] <Ian_> It's cheaper for me. The parts that you can start coding, are buidling a sentence with the $$ callsign and other information and appending the calculated CCITT-CRC16.
[18:45] <Zeusking19> Alright.
[18:45] <mfa298> CPC (linked to farnell) can be speedy if you pay for it (orderd just before 7pm last night, had some issues with the order and delivered by 11am today)
[18:45] <mfa298> but we did pay for pre 12 delivery
[18:45] <Zeusking19> Farnell offer next-day as standard, and mine was ordered at about 11:36
[18:45] <Zeusking19> am
[18:46] <Ian_> Then you can send the data as RTTY and listen to it through a small speaker. The RTTY mode can be swapped out with a different mode. and you can play with that code until you break it.
[18:46] <Zeusking19> I think the cutoff time for next day is 8pm, if I am not mistaken
[18:46] <Ian_> Then fix it again.
[18:46] <Zeusking19> Alright, thanks Ian
[18:46] <Zeusking19> When I order the UBLOX and NTX2, I'm also planning on ordering some tracking kit
[18:47] <Zeusking19> I'll have to use SDR, however, sadly I don't have enough money for some of the more expensive solutions :P
[18:48] <Ian_> Build on what you have, play around with it - get to know it and expand your knowledge towards a complete tracker. Don't be afraid to code different elements on their own until you get them to work
[18:48] <Ian_> Then look to integrate them with previously written code.
[18:49] <Zeusking19> alright, thank you for the advice
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[18:54] <Zeusking19> I am mostly concerned about the tracking, however, what I can afford most likely won't be good enough for tracking a balloon flight
[18:54] <Zeusking19> for testing my code, sure, it'll be fine
[18:54] <Zeusking19> But the real thing, I doubt it
[18:55] <Vaizki> you will get help from others in tracking
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[18:56] <Vaizki> the last mile is up to you of course
[18:56] <DL7AD> DL4MDW-11 has ,been launched
[18:57] <Zeusking19> I can't find it on habhub, is it under a different callsign?
[18:57] <Upu> Evening
[18:57] <Upu> !aprs add DL4MDW-11
[18:57] <SpacenearUS> 03Upu: Added 03DL4MDW-11 to APRS Importer
[18:58] <Zeusking19> Ah :P
[18:58] <DL7AD> :D
[18:58] <Upu> !aprs info DL4MDW-11
[18:58] <SpacenearUS> 03Upu: 03DL4MDW-11 was near 03Wedding, Berlin, Germany 10(52.54816,13.34433) at 03138 meters about 037 minutes ago - 12http://aprs.fi/info/DL4MDW-11
[18:58] <SpacenearUS> 03Upu: Path: 03DL4MDW-11>APECAN via 03WIDE2-1,qAR,DB0ZEH
[18:58] <SpacenearUS> 03Upu: Symbol: 03O/ Speed: 0335kmph Course: 0327°
[18:58] <SpacenearUS> 03Upu: Comment: 034.0Vb 0.0Vs 7C 96701Pa SATS05 http://tkrahn.net
[18:58] <DL7AD> Thanks upu
[18:58] <Zeusking19> Congrats on the launch, I guess, best wishes for the rest of the flight :)
[18:59] <Vaizki> launch at this tkme?
[18:59] <Vaizki> is it a floater?
[19:00] <Zeusking19> Perhaps I should start a blog in regards to my little HAB journey xP
[19:01] <DL7AD> Yes
[19:01] <DL7AD> Solar floater
[19:02] <DL7AD> 10min one cycle
[19:02] <SpacenearUS> New vehicle on the map: 03DL4MDW-11 - 12http://tracker.habhub.org/#!qm=All&q=DL4MDW-11
[19:02] Nick change: DL7AD -> DL7AD_mobile
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[19:07] <Upu> locked and loaded
[19:09] <Zeusking19> I didn't know that Farnell stocked the NTX2...
[19:09] <Upu> yes they do....
[19:09] <adamgreig> however you probably should buy it from Upu instead ;)
[19:09] <Upu> but its the original one
[19:09] <Zeusking19> Yeah
[19:09] <Upu> its only the 650 version
[19:10] <Zeusking19> Thing is, I have leftover budget from an element14 Design Challenge
[19:10] <Zeusking19> so I think it'd be best to use what I can
[19:10] <adamgreig> hey upu are the max 8s now in general stock?
[19:10] <Upu> yeah adamgreig
[19:10] <adamgreig> sweet
[19:10] <Upu> had 2 reels of them now
[19:10] <adamgreig> good good
[19:10] <adamgreig> cusf kiddies designing a rocket tracker with one
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[19:10] <Zeusking19> Upu, I was meant to ask you about the uBLOX MAX-M8Q Breakout (the 5V one)
[19:10] <Upu> not just saying this because biased but you would be better off with the NTX2B for a number of reasons
[19:10] <Upu> sure
[19:11] <Zeusking19> The level conversion chip for the SCL/SDA - how much of an additional charge is there?
[19:11] <adamgreig> yea really, I'd buy the radio from upu and get other bits from farnell. plenty of ways to spend free cash with them
[19:11] <Zeusking19> I was intending on buying from Upu anyway, it's just I saw farnell stocked it
[19:11] <Upu> if you order one and ask me nicely (i.e just stick it on the notes field with "please" after it) I'll won't charge
[19:12] <Zeusking19> Alright - thank you :)
[19:12] <daveake> Zeusking19 If you actually want a 650 I'll send you one
[19:12] <Zeusking19> I'll be back in about 10 minutes guys, thanks
[19:12] <Zeusking19> daveake - perhaps if you really want to ;)
[19:12] <daveake> I'm unlikely to use uit===it
[19:12] <Upu> send him a Lassen too :)
[19:13] <daveake> haha steady on what has he done to me?
[19:13] <Upu> lol
[19:13] <Upu> launch delayed for 2 days whilst GPS gets a lock
[19:14] <daveake> the origin of ISH
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[19:19] <Ian_> Depending upon what amount you have left over with Element14 you could buy in a couple of Atmega328p-pu chips, at about £2.50 or so a shot.
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[19:20] <Zeusking19> Back
[19:21] <Zeusking19> Put it this way, I have over £60+ left
[19:21] <adamgreig> maybe you could put it towards some tools - a good multimeter, a soldering iron, a scope?
[19:21] <adamgreig> or a box of arduinos and raspberry pis :p
[19:21] <Upu> if you haven't got a multimeter
[19:22] <Zeusking19> I have a multimeter, just a really basic one
[19:22] <Zeusking19> One of the Design Challenge kit pieces was an oscilloscope
[19:22] <Zeusking19> so I'm fine there too (but goddamn those are expensive)
[19:22] <Zeusking19> I have a soldering iron as well, so to be honest I'm okay there
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[19:24] <Zeusking19> I'll probably go down to my local Maplin or something for stripboard and a battery box, they are so cheap it's really not worth paying for shipping
[19:24] <Zeusking19> daveake, I'll probably just order an NTX2B from habsupplies :)
[19:25] <daveake> np
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[19:35] <Zeusking19> Just out of interest, would I be fine running an Arduino Uno + UBLOX6 + NTX2B on 4 Lithium Energizers for an entire flight?
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[19:36] <Upu> sketchy
[19:36] <Upu> unless they changed the regulator
[19:36] <Zeusking19> Or would I be better off with 6/8?
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[19:36] <Upu> find out what regulator is on the Uno
[19:36] <Upu> you'd be better using something that ran @ 3.3V
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[19:37] <Upu> Assume if cold the battery voltage will be 1.3-1.4V worst case
[19:37] <Lunar_Lander> hi DL1SGP
[19:37] <daveake> yeah you'll need 6 AAs to maintain >= 7V
[19:37] <Zeusking19> Alright, thanks
[19:37] <Upu> alternatively get a boost convertor from ebay and stick 4 cells (or 2) into that
[19:37] <Zeusking19> alright
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[19:38] <daveake> 6AAAs would also work
[19:38] <Zeusking19> I can tell my payload is going to end up being cobbled together from millions of different parts if I don't plan this out like I am now xD
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[19:40] <Upu> http://www.ebay.co.uk/itm/XL6009-DC-DC-Voltage-Step-Up-Boost-Converter-replace-LM2577-3-32v-input-UK-Fast-/400858208676?pt=LH_DefaultDomain_3&hash=item5d5502d9a4
[19:40] <Zeusking19> A (stupid) question, does the Ublox handle altitude as well or so I need a different part for that/?
[19:41] <Upu> yes it outputs altitude
[19:41] <Zeusking19> alright
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[19:50] <Vaizki> The pressure-based altimeters are worthless at 30km up I guess
[19:51] <arko> yeah, you need a special (usually expensive too) pressure sensor
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[19:51] <arko> to get anything accurate
[19:53] <Vaizki> That's what I thought yes
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[20:07] <SpeedEvil> Some do apparantly work - but they are not calibrated for that range
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[20:08] <Ian_> Mexican alledgedly
[20:09] <Ian_> Allegedly
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[20:25] <Jordan1> Hi guys, im having trouble with decoding my gps coords using dl-fldigi and i think ive gone wrong somewhere
[20:25] <Jordan1> ve gone back to the example RTTY code given on ukhas in the guide and when using this my waterfall on dl-fldigi has multiple signals, is this a problem
[20:28] <Jordan1> this is a link to a screenshot of my rtty, does this look odd to anybody? http://s16.postimg.org/a2jwhfor9/test.jpg
[20:28] <craag> It look like your shift is way too wide
[20:28] <craag> see on sdr# you have two distinct peaks
[20:29] <craag> those should be about 10x closer together
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[20:30] <Jordan1> how would i reduce this, im using the ntx2b
[20:30] <craag> Are you using a resistor divider to feed the ntx2b, or pwm?
[20:30] <Jordan1> to be honest, it is meant to be at 434.075 Mhz,
[20:31] <Jordan1> i tried putting a 68kOhm resistor on tx line but it made the signal worse
[20:31] <craag> Is there another signal at 434.075?
[20:31] <craag> ah no I can see there isn't
[20:31] <craag> Are you using a resistor divider to feed the ntx2b, or pwm?
[20:32] <Jordan1> pwm
[20:33] <Zeusking19> Out of curiousity, does anyone know any UK based suppliers of SDR receivers?
[20:33] <Zeusking19> I would prefer to not have to ship stuff overseas
[20:34] <craag> Jordan1: Is that with analogWrite(RADIOPIN, ...)
[20:34] <craag> ?
[20:35] <craag> Zeusking19: The rtlsdrs can be found on ebay from UK sellers
[20:35] <craag> Or the Funcube Pro Plus is made in the UK
[20:35] <Zeusking19> Alright, I've have a look
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[20:36] <Jordan1> its not craag, i just took the code straight from http://ukhas.org.uk/guides:linkingarduinotontx2 (Part 2) to test it
[20:37] <Jordan1> and i thought it worked because i could get the message out of dl-fldigi until i started using gps and realised it wasnt working
[20:37] <Vaizki> well that does use analogwrite (PWM)
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[20:37] <Zeusking19> craag: Just found one for around £8 that runs on the Realtek RTL2832U, highly rated seller, quite a few sold, so I think that'll be fine.
[20:37] <craag> Jordan1: look at the 'void rtty_txbit(int bit) {'
[20:37] <craag> function
[20:37] <craag> it uses analogWrite to set the two values for the two tones
[20:38] <craag> in the example, it uses values of 100, and 110. Try 100, 102, and see what happens.
[20:38] <craag> Zeusking19: Sounds good
[20:38] <Jordan1> oh sorry thats what you meant earlier
[20:38] <Jordan1> *im not the best at this*
[20:39] <craag> np :)
[20:39] <Jordan1> i'll give it a go now , one sec
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[20:39] <Vaizki> if you use that code, neither of the signals will be on the base freq of the NTX2B
[20:40] <Vaizki> and no, it doesn't matter. but there's nothing wrong with your tv set, it's normal.
[20:40] <craag> Yep, by using eg. 50,52 instead, you can move the both tones up/down in frequency.
[20:41] <Vaizki> just don't use 0 and 10
[20:41] <craag> oh?
[20:41] <Vaizki> well I tried it and found that 0 wasn't really 0, at least not always
[20:42] <Vaizki> then again I heavily modified the code before trying that
[20:42] <craag> heh can't say im surprised
[20:42] <Vaizki> anyway, I am sticking with 100,116 myself (produces 425Hz shift at 3.3V)
[20:43] <Jordan1> okay so
[20:44] <Jordan1> i changed to them values but i dont think it made any notable differance,
[20:44] <Jordan1> should i just play around with them analogue values?
[20:44] <Vaizki> what arduino are you running it on?
[20:44] <Jordan1> mega2560
[20:44] <Vaizki> no,
[20:44] <Vaizki> don't twiddle knobs randomly just yet
[20:44] <Jordan1> haaha, i'm sorry
[20:45] <Vaizki> mega 2560 is still a 5V board @ 16MHz right?
[20:45] <Jordan1> yes
[20:45] <Vaizki> which pin are you using for the radio?
[20:46] <Jordan1> 9
[20:49] <Vaizki> hmm I don't use the mega myself, never have but looks like PIN 9 on the mega is PWM controlled by OC2B while on the Uno it's controlled by OC1A
[20:50] <Vaizki> so the code is not going to translate directly because it goes and messes with the registers
[20:51] <Zeusking19> craag, just to double check, this will be fine, yes? assuming from the RTL2832U+R820T? http://www.ebay.co.uk/itm/Digital-DVB-T-USB-TV-RTL-SDR-FM-DAB-Radio-Tuner-Receiver-Stick-RTL2832U-R820T-/300954954160?pt=LH_DefaultDomain_3&hash=item46125029b0
[20:51] <Jordan1> shall i try it on pin 11
[20:52] <Jordan1> thats oc1a
[20:52] <Vaizki> err let me see now.. :)
[20:53] <Vaizki> pin 11 is oc2a on uno ;)
[20:54] <Vaizki> I need to dig out the datasheet I guess
[20:54] <Jordan1> on mega its pin 11 it says
[20:54] <Vaizki> yes but you need to match the pin and the timer config
[20:55] <craag> Zeusking19: Looks good! Those are the exact ones we use for http://websdr.suws.org.uk/
[20:55] <Vaizki> Zeusking19: should be ok, R820T2 is supposedly better, I have both but have not done head to head compare
[20:55] <Jordan1> oooh
[20:55] <Zeusking19> Great, thanks for the confirmation :P
[20:56] <Zeusking19> Interesting site, actually
[20:57] <Zeusking19> Just tuned into a random frequency and there is an interesting conversation on bacon and potato bakes xD
[20:57] <Jordan1> so Vaizki, why is that wrong - the extra signals and the gap between peaks, i just thought it was all dandy about two weeks ago becase it still got message across in rtty
[20:58] <craag> Zeusking19: Welcome to ham radio ;)
[20:58] <Zeusking19> ;)
[20:58] <Vaizki> Jordan1: I have no idea why it worked or why it doesn't now.. really.. but that code is for atmega328p which has different ports / pins from your atmega2560
[20:58] <Vaizki> comment out setPwmFrequency(RADIOPIN, 1);
[20:59] <db_g6gzh> Zeusking19: I got mine from https://www.cosycave.co.uk/category.php?id_category=61 which saves getting bits you don't need and you may also want to get an adaptor lead to SMA
[20:59] <Vaizki> and add right after it: TCCR2B = TCCR2B & 0b11111000 | 0x1
[21:00] <Vaizki> and use PIN 9 for radio
[21:00] <Vaizki> because pin 9 on arduino mega is OC2B which is a timer2 output compare register
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[21:01] <Vaizki> so you need to set the timer control register for timer2 to run at full speed (no prescaler)
[21:01] <Jordan1> okay!
[21:01] <Zeusking19> db_g6gzh: Good to know - thank you
[21:01] <Jordan1> here goes !
[21:01] <Vaizki> it means your PWM will run faster, so the output waveform should be cleaner
[21:02] <Jordan1> fingers crossed
[21:02] <Vaizki> basically with TCCR2B = TCCR2B & 0b11111000 | 0x1; does is.. clear lowest 3 bits of TCCR2B and set the lowest bit (CS0)
[21:03] <Vaizki> if you check http://www.atmel.com/images/doc2549.pdf
[21:03] <Vaizki> go to page 190 & 191
[21:03] <Vaizki> setting those bits to 0 0 1 = No prescaling
[21:04] <Vaizki> and hey, I just learned all this in the last 24 hours ;)
[21:04] <Zeusking19> db_g6gzh: https://www.cosycave.co.uk/product.php?id_product=323 <- for this one, for example, where could I get an antenna for that?
[21:04] <Jordan1> umm
[21:04] <Jordan1> it definatly did something
[21:04] <Jordan1> let me upload what i see because i have distant signals
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[21:08] <Zeusking19> I'm off, night all
[21:08] <Jordan1> Vaizki, i got this http://postimg.org/image/jpvwpq20l/ the signal is drifting but atleast its one??
[21:08] <Vaizki> Zeusking19: those dongles use MCX sockets (as it says on the web page). you probably can't find a decent 70cm antenna with MCX on it so you want a short "pigtail" with MCX on one end and SMA/BNC/UHF/N whatever your antenna uses - on the other end
[21:08] <Vaizki> whoa..
[21:09] <Vaizki> you should see two strong peaks
[21:09] <Vaizki> maybe your shift is so wide it's not inside the filter or something..
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[21:10] <Vaizki> ok, just for reference, here is my test from yesterday.. https://dl.dropboxusercontent.com/u/367935/rtty_decode.png
[21:11] <Jordan1> hmmm ;/
[21:11] <Vaizki> my signal is not very clean (it's transmitted without an antenna using PWM) but you can see the 425Hz shift there
[21:11] <Jordan1> im starting to think its the ntx2b
[21:11] <Jordan1> inthe image i linked
[21:12] <Vaizki> well you can try this, leave the TX pin on the NTX2B disconnected, just connect Vcc, ground and EN on it
[21:12] <Jordan1> there is three peaks , one on either side of the largest peak
[21:12] <Vaizki> you should get a constant signal on some frequency
[21:13] <Jordan1> yes i do
[21:13] <Jordan1> just a tone
[21:13] <Vaizki> ok, now keep it running and connect the TX pin to GND
[21:13] <Vaizki> it should shift down to the frequency printed on the module
[21:14] <Vaizki> (I think)
[21:14] <Jordan1> it shifted down a little
[21:15] <Vaizki> ok so it seems to respond to input, I don't think it's faulty
[21:15] <Jordan1> but its running on 434.047 when it its a 434.075
[21:15] <Vaizki> if you have +3V available, connect TX to that and it should go 6kHz higher than base
[21:16] <Vaizki> the TX pin should get 0..3V input for a shift of 0..6kHz, so 2kHz per volt
[21:16] <Vaizki> you shouldn't connect +5V to the TX pin directly
[21:17] <Vaizki> I don't think it's going to die, just not designed for that
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[21:17] <Jordan1> yes it went up by 6
[21:17] <Vaizki> ok, nothing wrong with your NTX2B then
[21:18] <Upu> Jordan1 what are you using recieve ?
[21:18] <Upu> sorry if I've come in mid conversation
[21:18] <Vaizki> upu wrote that code, maybe he can help :)
[21:18] <Jordan1> usb dongle let me find the exact name for you
[21:18] <Upu> no thats enough :)
[21:18] <Vaizki> upu, tl;dr version - he is using an arduino mega and pwm output to ntx2b
[21:18] <Upu> ok
[21:19] <Upu> well the NTX2B will be more accurate on frequency than the dongle
[21:19] <Upu> is it a hab supplies NTX2B ?
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[21:19] <Jordan1> i bought it from radiometrix site
[21:19] <Upu> ok 075 ?
[21:19] <Jordan1> yes
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[21:19] <Vaizki> on Arduino Uno / Nano pin 9 gets pwm from Timer 1 but on mega it looks like it's timer 2
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[21:20] <Upu> taking the arduino out of the equation
[21:20] <Vaizki> that's why I told him to ditch the setPwmFrequency() func and modify TCCR2B directly for no prescaler
[21:20] <Vaizki> there's your catchup :)
[21:20] <Upu> if you just connect VCC GND and TXD to GND your carrier should be on 075
[21:20] <Upu> so you can calibrate your dongle
[21:20] <Upu> err
[21:20] <Upu> 072
[21:21] <Vaizki> he does get a 6kHz shift between GND and +3V on the TXD
[21:21] <Upu> ok
[21:21] <Upu> so whats the issue ?
[21:21] <Upu> oph PWEM
[21:21] <Vaizki> pwm doesn't seem to be working
[21:21] <Upu> meh typing
[21:21] <Upu> you know
[21:21] <Upu> I would just use the single pin 3 resistor method
[21:22] <Vaizki> I would too
[21:22] <Babs_> yo yo Upu - the icsp header has 5v on, presumably with the low power atmega it can still do all of its programming stuff at the lower voltage too?
[21:22] <Upu> hang on
[21:22] <Vaizki> I would if I had suitable resistors :)
[21:22] <Upu> yes Babs_ "5v" = whatever your VCC is
[21:22] <Jordan1> the pin 3 resistor method
[21:22] <Upu> yeah 1 sec Jordan1
[21:23] <Vaizki> http://ukhas.org.uk/guides:linkingarduinotontx2?rev=1399496254
[21:23] <Vaizki> that one?
[21:23] <Upu> I switched back on Habduino V4
[21:23] <Vaizki> http://ukhas.org.uk/_detail/guides:ntx2_divider.jpg
[21:23] <Vaizki> or that one? :)
[21:23] <daveake> PWM can be more like PITA depending what else is going on with timers
[21:23] <Upu> http://i.imgur.com/gaXocES.png
[21:23] <Upu> yes that
[21:24] <Upu> thats Adam's maths explaining it all :)
[21:24] <Upu> but that circuit I put (for the MTX2 but its the same)
[21:24] <Upu> just toggle TXD high/slow
[21:24] <Upu> low
[21:24] <infaddict> guys when sending altitude do u use mean sea level or ellipsoid?
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[21:24] <Jordan1> okay so
[21:25] <Jordan1> i'll get the required resistors
[21:25] <Upu> infaddict whatever it reports in the GNGGA string
[21:25] <Jordan1> does this require a differant code
[21:25] <Upu> yeah slightly
[21:25] <infaddict> thx Upu will check that
[21:25] <adamgreig> infaddict: whatever gives you the bigger number ;)
[21:25] <Upu> rather than analogue.write
[21:25] <infaddict> lol its about 40m difference for me ;-)
[21:25] <adamgreig> 40m can be everything
[21:25] <Upu> jsut pull it high/low
[21:25] <adamgreig> :P
[21:25] <daveake> Ah the $GPMEX sentence
[21:25] <Upu> haha
[21:25] <Jordan1> do many people have the problem i have then, is this simply because im using arduino mega
[21:26] <adamgreig> hehe
[21:26] <Upu> Not many people use the mega tbh
[21:26] <Upu> its overkill
[21:26] <Upu> unless you have loads of sensors
[21:26] <daveake> Erm if you're using a Mega ...
[21:26] <daveake> ... use 3 resistors ...
[21:26] <daveake> ... from a spare serial port.
[21:26] <Upu> only time we flew a mega
[21:26] <Upu> we lost it in the English channel :)
[21:27] <infaddict> ok so GPGGA is height above mean sea level, so I will use that
[21:27] <Upu> Satellite modem
[21:27] <Vaizki> ouch
[21:27] <Upu> oh that was the cheap bit :)
[21:27] <Jordan1> i have a few
[21:27] <infaddict> sadly thats my lower altitude haha
[21:27] <Upu> I think we dumped £1000 in there
[21:27] <infaddict> urgh
[21:27] <Jordan1> oh damn
[21:27] <jededu> Wow
[21:28] <infaddict> turns out I live at 20m above sea level. quite low.
[21:28] <Upu> plus the however much it was to get a boat out to go get it
[21:28] <daveake> That's probably about how much the met office saved by not flying any balloons that day
[21:28] <Upu> which didn't find it
[21:28] <Upu> yeah lol
[21:28] <Jordan1> do you think i'll have similar problems with the gps because of mega
[21:28] <Vaizki> no
[21:28] <Upu> no the mega has lots of proper serial ports
[21:28] <Upu> so GPS should be gine
[21:28] <Upu> fine
[21:29] <Upu> use hardware serial on the GPS
[21:29] <Vaizki> but just do the 3 resistor method for driving the ntx2b, the output is cleaner anyway
[21:29] <Upu> +1
[21:29] <Upu> I might change the wiki
[21:29] <daveake> and do that from another serial port
[21:29] <Upu> back
[21:29] <Jordan1> i was only asking because i have been testing it with tiny gps example codes (ublox neo 6m) and i get checksum fails that increment on one of the tests
[21:29] <daveake> then the code is simpler
[21:29] <Upu> is it using software serial Jordan1 ?
[21:30] <Jordan1> i was using 13 and 12 which is ss
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[21:30] <daveake> OK I have to ask a question
[21:30] <infaddict> this is topical as I am about to code my radio code. so u guys reckon PWM isnt worth it?
[21:30] <Upu> infaddict it works fine
[21:30] <daveake> Why are you a) using a mega and b) not using any of its plentiful serial ports ?
[21:30] <Vaizki> daveake: you mean just do Serial2.begin(50, SERIAL_7N2); ?
[21:30] <Upu> but single pin works fine
[21:30] <infaddict> right
[21:30] <Vaizki> daveake: b) he's cut & pasting?
[21:31] <Upu> Jordan1 - yeah use a hardware serial for GPS
[21:31] <Vaizki> infaddict: short version is that PWM works but resistor setup is better
[21:31] <Jordan1> okay
[21:31] <Upu> software serial causes lots of issues
[21:31] <Jordan1> use the tx rx
[21:31] <Jordan1> and im using mega because i got it for free :)
[21:31] <Upu> fair enough
[21:31] <Upu> also
[21:31] <daveake> Well it has 4 serial ports
[21:31] <daveake> so use 1 for GPS and 1 for RTTY
[21:32] <Upu> if you're using a shing-long-ling-long NEO6M
[21:32] <daveake> then you have another for debug
[21:32] <infaddict> yep i wish more arduino smaller boards had more than 1 serial
[21:32] <Upu> the logic levels on the mega are 5V
[21:32] <Upu> the GPS is only rated for 3.3V
[21:32] <daveake> Yeah I'd like to see a Mega Mini Pro 3V3
[21:32] <Upu> Jordan1 http://ava.upuaut.net/?p=738
[21:32] <Upu> may help
[21:33] <craag> daveake: aka stm32f0?
[21:33] <Upu> I should make a mega pro min
[21:33] <Upu> call it something suitable italian
[21:34] <infaddict> lol
[21:34] <Vaizki> it wouldn't be very mini?
[21:34] <infaddict> prominium
[21:34] <Upu> smaller than a mega :)
[21:34] <daveake> megagalattico
[21:34] <Jordan1> im also using a gsm
[21:34] <Jordan1> which uses tx rx
[21:35] <Upu> well you have 4 serial ports
[21:35] <infaddict> espromini
[21:35] <Upu> use 'em
[21:35] <Jordan1> so
[21:35] <Jordan1> what was wrong with my first working rtty
[21:35] <Upu> Megaciaociao
[21:35] <daveake> There you go then 4 serial: RTTY, GPS, GSM, debug
[21:35] <Jordan1> was it just because it had multiple signals on waterfall
[21:36] <Upu> did you post a screen shot ?
[21:36] <Upu> (came to the conversation late)
[21:36] <Vaizki> I think it was working because there's nothing really wrong with the code except your PWM is running in a slower cycle
[21:36] <Jordan1> http://s16.postimg.org/a2jwhfor9/test.jpg
[21:37] <Vaizki> so your output to the NTX2B is not very clean
[21:37] <Upu> what Vaizki said
[21:37] <Upu> I would switch to the 1 pin method
[21:37] <Upu> should be much cleaner
[21:37] <daveake> Well if this is cut 'n' pasted code it will be setting up the wrong timer
[21:37] <Upu> just replace the analogue writes with digital high/lows
[21:37] <Vaizki> yes, it sets up timer1 and not 2
[21:37] <infaddict> yep mega has different registors for timers
[21:38] <infaddict> and possibly different bitfield for scaling too
[21:38] <Upu> My code assumes a Uno/ Duemilanovo
[21:38] <Upu> atmega328p
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[21:39] <Jordan1> ok
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[21:39] <infaddict> so for my benefit, thats noisy because of the stuff between the 2 waterfalls?
[21:39] <Vaizki> infaddict: well mega has 6 timers instead of 3
[21:39] <Jordan1> so the resistor code , what do i ened to change for this to work with mega
[21:39] <Vaizki> the registers are the same but pin assignment and output compare mapping to them is not
[21:39] <Jordan1> im not very good at this
[21:39] <daveake> <Upu> just replace the analogue writes with digital high/lows
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[21:40] <Vaizki> I linked the old version of the wiki page which has ready code (by upu=
[21:41] <Vaizki> but read the part about understanding it
[21:42] <Jordan1> oh yes i see
[21:42] <Jordan1> im gonna read it now
[21:43] <Jordan1> i cant do anything until i get the resistors anyway
[21:43] <Upu> you could use some 10k I suspect
[21:43] <Upu> just use 2 x 10k and then 2 x 10k in series in place of the 15k
[21:43] <Upu> don't worry about exact values
[21:43] <Vaizki> well for the biasing at least 10k or 4k7 should be same
[21:43] <Vaizki> as long as they're equal
[21:44] <Vaizki> well they don't really need to be equal even but...
[21:44] <Jordan1> thank you all by the way for spending the time to help me with this
[21:44] <Jordan1> i appreciate it
[21:44] <Vaizki> it will just not get biased to 2.5V :)
[21:45] <Upu> its fine Jordan1 would rather you get it right
[21:45] <Upu> and its novel for an University team to come one here and take advice :)
[21:45] <Jordan1> also - abit more off topic, when you apply for the NOTAM, how long does it take for them to get back
[21:45] <Upu> haha
[21:45] <Upu> well
[21:45] <Upu> actually issue the NOTAM usually about 12 hours before you need it
[21:45] <Jordan1> WHAT
[21:46] <Upu> well apply for it
[21:46] <Jordan1> so you have to call them and hope ?
[21:46] <Upu> and you'll probably get it about 4.30 the day before you laucnh
[21:46] <Vaizki> read dave's blog for the dance to perform
[21:46] <Upu> I don't bother these days just let daveake deal with it :)
[21:46] <daveake> lol
[21:47] <Upu> I applied for a NOTAM once
[21:47] <Upu> never got it
[21:47] <daveake> I have a Frequenct Flier card
[21:47] <daveake> -c
[21:47] <Upu> apparently "end of run way leeds bradford airport" isn't an acceptable place to launch
[21:48] <daveake> Tricky enough to land there anyway
[21:48] <Vaizki> mental note: never go to leeds, at least on an airplane
[21:48] <Upu> :)
[21:49] <Jordan1> hahahaha
[21:49] <Upu> in seriousness the NOTAMS from here are a pita as you have to go North to avoid LBA and Manchester
[21:49] <Upu> and the winds rarely do that
[21:49] <Upu> so I just drive to daveake's
[21:49] <daveake> convenient motorway connection
[21:49] <Upu> have to go = actually specified on the NOTAM
[21:49] <daveake> best launch facilities
[21:49] <Upu> indeed your own private motorway
[21:50] <infaddict> brrr this GPS testing is cold. Sitting outside on macbook waiting for fix. beer in hand of course. god knows what neighbours think ;-)
[21:50] <infaddict> my temp sensors are reading 2 degrees
[21:50] <Upu> Best way to spend a Friday night infaddict
[21:50] <infaddict> ;-)
[21:51] <Upu> could be worse you could be trying to exchanger signal reports with someone in America
[21:51] <Vaizki> or texas
[21:52] <Vaizki> http://www.chip45.com/products/crumbuino-mega_arduino_compatible_atmega2560_module_board_usb.php
[21:52] <Vaizki> these mega minis are not cheap
[21:52] <Jordan1> mine actually works very well in my room by my window
[21:52] <Upu> using a patch antenna ?
[21:52] <Vaizki> mine doesn't, I have selective glass windows
[21:53] <Upu> the 2560 is £10
[21:53] <infaddict> jeez Upu
[21:53] <Vaizki> gsm barely works
[21:53] <infaddict> that is pricey
[21:53] <Upu> not really
[21:53] <Upu> its probably 4 layer
[21:53] <daveake> http://www.ebay.co.uk/itm/Mega2560-CORE-mini-2560-Arduino-compatible-3-3V-5V-for-Arduino-mega-2560-/251635670387?pt=LH_DefaultDomain_3&hash=item3a96a79d73
[21:53] <Vaizki> ok that's cheaper :)
[21:53] <Upu> thats just daft
[21:54] <Upu> you can't buy the chip for that
[21:54] <Upu> http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?ost=atmega+2560&catalogId=15001&langId=44&productId=65349567&storeId=10151
[21:55] <Upu> the chip45 one looks better quality
[21:55] <Vaizki> maybe they use the chips which failed the factory testing ;)
[21:58] <Babs_> some of them there libraries don't work with the 2560
[21:58] <Babs_> i breadboarded one up
[21:59] <Vaizki> might as well go ARM
[21:59] <Vaizki> than start wrangling with arduino and mega incompatibilities
[22:00] <Upu> Evening Babs_
[22:00] <Babs_> Hey upu - sorry, stepped away from the computer. thanks for the 3v3 advice.
[22:00] <Upu> nps
[22:00] <Upu> we have new plans for stabilisation thing
[22:01] <Vaizki> teensy 3.1 was my first idea for a tracker base but decided to do 328p anyway
[22:01] <Babs_> go on
[22:01] <Upu> however 3D printer has died again
[22:01] <Upu> http://i.imgur.com/Mql32Zv.jpg
[22:01] <Vaizki> https://www.pjrc.com/teensy/teensy31_front_pinout.png
[22:01] <Vaizki> this one
[22:01] <arko> hahahahahahahaa
[22:01] <arko> Upu that is amazing
[22:01] <Babs_> arf
[22:01] <Upu> seriously
[22:02] <Upu> doing our heads in
[22:02] <Vaizki> hey at least it's not a quick disappointment
[22:02] <Babs_> use this guy's SLS machine https://www.3dprint-uk.co.uk/
[22:02] <Vaizki> you get your money's worth
[22:02] <arko> it's better to ask how often it doesn't work
[22:02] <Babs_> actually he has 2 now
[22:02] <Upu> when it works its amazing
[22:02] <arko> 3d printers are just flimzy poop making machines
[22:02] <arko> i thought 2d printers and their drivers were bad
[22:03] <arko> 3d printers just add a whole new dimention of broken
[22:03] <Vaizki> arko: you definitely need a pcb printer ;)
[22:03] <Upu> all the crap on the bench is a bearing :/
[22:04] <Miek> i've been ultra cynical about 3d printers for a long time, but we recently got some money together and bought one that just works(tm) and it's pretty damn good
[22:04] <Upu> which one did you get Miek ?
[22:04] <Miek> the ultimaker 2
[22:04] <Babs_> the SLS is 10p per cm3.
[22:05] <Upu> Wish we'd spent the extra money
[22:05] <adamgreig> SLS love
[22:05] <adamgreig> such nice results
[22:05] <craag> lulzbot Taz at the local hackerspace seems to jsut work
[22:05] <Babs_> Sorry, I bet I'm not helping the disappointment factor there.
[22:06] <Upu> like I say when it works its great
[22:06] <Upu> it just doesn't work very often
[22:06] <craag> is there a particularly problematic part?
[22:06] <Upu> yes
[22:06] <Upu> the printer
[22:06] <craag> heh
[22:06] <Upu> head blocks up
[22:07] <Upu> documentation calibration is for a different printer
[22:07] <Upu> frame is stupid
[22:07] <Upu> support is rubbish
[22:07] <Upu> well
[22:07] <Upu> to be fair
[22:07] <Upu> support goes home at 3pm on a Friday
[22:07] <Upu> dunno if that constitutes rubbish
[22:07] <Babs_> whats the deal wth the new stabilisation plan thing
[22:08] <craag> I'd say it does
[22:08] <Upu> we ordered a new nozzle
[22:08] <Upu> they sent us the wrong one
[22:08] <goopypanther> I had a first gen makerbot and really the only problem was the extruder
[22:08] <Upu> the frame on the Huxley is an A
[22:08] <craag> I have heard that those frames tend not to be stiff enough
[22:09] <Upu> which limits the print area
[22:09] <Upu> Going to retain the dual platter
[22:09] <Upu> but tilt it in a cage using a servo
[22:09] <craag> An old school friend of mine runs: http://e3d-online.com/
[22:09] <craag> They've put a lot of effort into decent engineering on the parts
[22:09] <Babs_> Upu - an experienced guy like you should have known the nozzle was never going to work just from the picture http://tinyurl.com/lasc9pd
[22:10] <Upu> lol
[22:10] <Miek> hah
[22:10] <Upu> the build was extremely frustrating too
[22:10] <Babs_> and all the electronics, battery etc. to drive the motor contained within the cage
[22:11] <Upu> yes Babs_
[22:11] <Babs_> accelerometer etc. computer can be held outside it
[22:11] <Babs_> nice
[22:11] <Upu> we were trying to print a bearing for it all
[22:11] <Upu> when we broke the printer
[22:11] <Upu> again
[22:11] <craag> lol
[22:11] <Babs_> go to smb bearings
[22:11] <Vaizki> maybe you could print a new printer
[22:11] <Upu> so I may just go rip the wheel off my old skate board
[22:12] <Upu> and pull the bearings out of it
[22:12] <Babs_> http://www.smbbearings.com/smbnew/plastic-metric-bearings.html
[22:12] <Upu> they are only 20 years old
[22:12] <Babs_> tested at 30km up
[22:12] <Upu> ta
[22:12] <Upu> was going to ask what you used
[22:13] <Babs_> https://www.flickr.com/photos/91049302@N00/8461544439/in/set-72157632733154985
[22:13] <Upu> rotating the discs should give a high degree of control
[22:13] <Babs_> whatever the diameter of the bearing, add in 0.25mm to the hole they are going into and they slot in nicely
[22:14] <Upu> ok ta
[22:14] <Babs_> i used a tiny bit of araldite around the edge once they were in and they stayed snug
[22:15] <goopypanther> SSDV question: Is ssdv limited to jpg images or can I use other formats? Non-jpg smartphone cameras are cheap but doing jpg compression on a low powered microcontroller is daunting.
[22:15] <Upu> jpg only I think
[22:15] <Upu> serial camera
[22:15] <Upu> ping fsphil
[22:15] <daveake> The existing encoder is indeed jpeg only
[22:15] <Upu> is your man for htis
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[22:16] <Babs_> Upu - only one other idea for you
[22:17] <Upu> shoot
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[22:17] <Babs_> if you can 3-D print a sort of doughnut to fit on the outside of your wheel, you will get a bunch more torque
[22:17] <Babs_> there isn't a lot of angular momentum in the one you have
[22:18] <Vaizki> it will be nearly impossible to balance for 7200rpm?
[22:18] <goopypanther> yeah, I was thinking serial camera but I'd much rather use a module like http://web.tradekorea.com/upload_file/prod/marketing/mkt_files/new_company//erixo9988/img_en/o_P281748.jpg than one like http://www.rdmag.com/sites/rdmag.com/files/uCAMx250_0.jpg
[22:18] <Vaizki> or whatever his platters run at
[22:18] <Babs_> easy to balance
[22:18] <Upu> Vaizki 2 motors counter rotating
[22:18] <Upu> it seems to balance itself
[22:18] <Vaizki> no but I mean putting extra weight on the platter
[22:19] <Vaizki> goopypanther: raspi a+ and camera board comes to mind...
[22:19] <Babs_> https://www.flickr.com/photos/91049302@N00/14039993124/in/set-72157636929911016
[22:20] <Babs_> just use a smartphone and a few bits of tape
[22:20] <Upu> for this sort of thing the Pi is a better option
[22:20] <Babs_> i would like to claim credit for the method but the fact is i found it on the interweb
[22:20] <Upu> :)
[22:21] <Upu> I will advise if it needs extra weight (could always mount more platters)
[22:21] <Upu> after testing
[22:22] <Vaizki> if you have a ball-shaped payload, you're not really going to need a lot of torque?
[22:22] <Babs_> i will be really annoyed if you make my pointy method obsolete before it ever gets launched
[22:23] <fsphil> goopypanther: jpeg only
[22:23] <Babs_> presumably you are using some PID control algorithm?
[22:23] <SpacenearUS> New vehicle on the map: 03PS-35 - 12http://tracker.habhub.org/#!qm=All&q=PS-35
[22:24] <Babs_> some stuff i found handy http://brettbeauregard.com/blog/2011/04/improving-the-beginners-pid-introduction/
[22:24] <Upu> goopypanther fsphil is behind ssdv
[22:25] <Vaizki> oo new PS
[22:25] <lz1dev> PS series are chasing down the B series
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[22:32] <infaddict> anybody had a crash when calling sei() to disable interrupts whilst you muck around with registers?
[22:32] <infaddict> sry cli()
[22:32] <fsphil> you might be doing something that uses delay()
[22:33] <daveake> or serial.write
[22:33] <infaddict> ah. i'm calling cli() as part of void setup. i do have some serial.write in there to tell me what its doing as it progresses thru various setup tasks.
[22:33] <infaddict> no delays
[22:34] <infaddict> main loop has a delay tho
[22:34] <daveake> yeah that won't work
[22:34] <daveake> main loop doesn't matter at all
[22:34] <infaddict> whys thats dave? i thought delay used timer1 and i'm using timer2. or does disabling interrupts screw all timers?
[22:35] <daveake> because the main loop isn't being called
[22:35] <daveake> disabling interrupts disables all interrupts so serial stops
[22:35] <infaddict> ah right even tho i them enable them again moments later?
[22:35] <daveake> or rather, your code will stop if it trys sending
[22:36] <daveake> you can't call serial.write whilse ints are disabled
[22:36] <infaddict> ok i dont think i am but let me double check that
[22:36] <infaddict> thx
[22:38] <infaddict> yep i had a write in interrupt code to prove it was working ;-/ so technically that shouldnt have been executed until i re-enabled interrupts?
[22:38] <infaddict> between sei and cli there are only 8 lines of register stuff, no writes.
[22:39] <infaddict> maybe interrupt is being called before i get chance to call sei
[22:39] <fsphil> it would have blocked
[22:40] <infaddict> ok i dont fully understand it, but its working now
[22:41] <Vaizki> don't call anything between cli() and sei()
[22:41] <Vaizki> I mean arduino libs...
[22:42] <infaddict> i'm not. just setting registers
[22:42] <daveake> What did you change to make it work ?
[22:42] <Vaizki> ah ok sorry missed that
[22:42] <infaddict> removed the serial.write from ISR routine
[22:42] <Vaizki> timer1?
[22:43] <Vaizki> serial.write() should work from a timer1 ISR at least (works for me)
[22:43] <infaddict> yes timer1 is what i am using
[22:44] <infaddict> so its fixed but dont understand the problem
[22:44] <infaddict> serial.write does stop early when i have the write statement in the ISR
[22:44] <Vaizki> see, here's my code.. //Serial.print("."); // Probably not a good idea from ISR
[22:44] <Vaizki> ;)
[22:45] <infaddict> ok why not tho
[22:45] <infaddict> apart from flooding debug window
[22:45] <Vaizki> well I didn't write the arduino serial lib so don't know what it does
[22:45] <infaddict> i just wanted to prove ISR was executing
[22:45] <daveake> flash an LED
[22:45] <Vaizki> yea, toggle a GPIO
[22:45] <daveake> as a general rule, don't do anything in an ISR that doesn't *have* to be there
[22:46] <infaddict> yer this was just a test to prove it was hitting it. not permanent
[22:46] <Vaizki> but my Serial.print() did work
[22:46] <Vaizki> I just printed one char to make sure it can finish super quic
[22:46] <Vaizki> never tried a longer output because well it's an ISR
[22:47] <Vaizki> by toggling a GPIO I can also verify the ISR speed (=baud rate) with a scope
[22:47] <daveake> Exactly - 1 char will go straight to the UART, more than 1 (or more than 3 on some PICs) will need interrupts
[22:47] <Vaizki> yea..
[22:47] <infaddict> ok lemme try 1 char as a test
[22:48] <daveake> and don't do that in a timer ISR that is running faster than the byte rate out of the serial port
[22:48] <Vaizki> did a bit of interrupt coding on DOS in the 80's, I have an inbuilt guard mechanism against calling anything in ISRs :)
[22:48] <daveake> yes, good thing to have
[22:48] <infaddict> 50 baud so slower than 9600 serial
[22:49] <daveake> 50Hz you mean :)
[22:49] <infaddict> yer
[22:49] <infaddict> still crashes
[22:49] <infaddict> i can up serial board to see if that matters
[22:49] <Vaizki> infaddict: a UART/USART will buffer a byte for you and tap it out on the line
[22:49] <Vaizki> but if you put out more than one byte, a basic one UART will request more bytes via interrupt
[22:50] <Vaizki> when it's done with the first
[22:50] <infaddict> ok well writing a . like you did still freezes
[22:50] <Vaizki> ok next try a #
[22:50] <Vaizki> just kidding :D
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[22:51] <Vaizki> I would need to see the code to comment further
[22:51] <Vaizki> or maybe sleep
[22:52] <infaddict> yay at 115200 i see the dots. then it crashes when my GPS output is written (too much and too slow).
[22:52] <infaddict> so at least i know its hitting interrupt
[22:52] <infaddict> thanks guys
[22:52] <infaddict> will remove write and goback to 9600
[22:53] <infaddict> so i now have all my code except any SD stuff and have 600 bytes RAM to spare lol
[22:53] <Vaizki> toggling a GPIO is mighty fast and unobtrusive
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[22:55] <Vaizki> read memory, bitwise xor, write memory :)
[22:55] <Vaizki> ok, I'm lazy and use the arduino lib there so it's probably 200 lines of code
[22:56] <infaddict> thought u werent using any arduino libs?
[22:57] <Vaizki> well I use Serial and digitalwrite/pinmode bcause I'm lazy
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[22:58] <Babs_> ping daveake
[22:58] <Vaizki> and analogwrite for pwm.. but digitalwrite/analogwrite are easy to replace, as well as pinmode.
[22:58] <daveake> pong
[22:59] <Babs_> hey dave - quick q - i am running erc on eagle and it is saying that there is an error because adc6 and adc7 are not connected. i can't find much reference to them on the datasheet. am i ok to leave them unconnected ?
[23:00] <goopypanther> I have been super happy with the single instruction gpio manipulation feature that freescale's arm micros have
[23:00] <daveake> you don't have to connect those pins
[23:01] <Babs_> cool thanks. first time with erc and trying to work out what actually are errors and what aren't. cheers.
[23:01] <Jordan1> is upu still around ?
[23:03] <Vaizki> goopypanther: is that through bit banding to a register?
[23:04] <Vaizki> or did they actually make something special?
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[23:06] <Vaizki> at least on cortex m3 the whole peripheral memory space was aliased to a separate bit-banded "virtual memory" where you had access to each bit through a separate word
[23:06] <Vaizki> so all single bit operations could be done with single instruction
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[23:09] <Vaizki> seems to be also in cortex m0 yes.. very nice.
[23:09] <Jordan1> anyone who has used the ublox software to get the flight mode command, every code i see ends with 0*16 0*DC but mine says
[23:09] <Jordan1> 0*52 0*B8
[23:10] <infaddict> thats the checksum
[23:10] <Jordan1> is this just a software update ? im looking at the flight mode command from ublox themself
[23:10] <Jordan1> E8*
[23:10] <infaddict> it will be different because one of your bytes in the msg is different
[23:10] <daveake> You need to refer to the ublox manual to see the command structure and contents
[23:10] <infaddict> if you look at the bytes, the ublox centre software actually sets bytes in the middle
[23:10] <infaddict> i have found they are not needed but dont cause harm
[23:11] <Jordan1> i just find it odd that its differant on the software to what guides and example codes give
[23:11] <infaddict> not odd, the software is latest version whereas code is years old likelt
[23:12] <Vaizki> I have not started on UBX yet but I imagine there is a checksum?
[23:12] <infaddict> i found about 10+ different versions of the flight mode looking thru peoples code
[23:12] <Vaizki> so if any part of the msg changes, the last 2 bytes will also
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[23:12] <infaddict> correct
[23:12] <infaddict> i wrote my own mini pgm to calc what they should be so i could test different messages
[23:12] <Jordan1> oh so its probably an updates version of software
[23:12] <infaddict> as they have to be correct on send not just receive
[23:13] <infaddict> yes, there are reserved bytes in middle which are used in later versions
[23:13] <infaddict> the software should always be correct to latest firmware
[23:13] <infaddict> so if in doubt, use that
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[23:14] <Jordan1> actually, if i copy and pasted example code, it might explain why i was getting a checksum fail
[23:14] <Jordan1> if the new software has differant last two bits
[23:14] <infaddict> well as long as your char/byte array matches the software you shouldnt get checksum error
[23:14] <infaddict> but also even using old versions of the char array the checksum should be fine
[23:14] <infaddict> where did you see checksum error?
[23:15] <Jordan1> tinygps example code it had an incremented checksum fail at the end
[23:15] <infaddict> ok i've never used tinygps.
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[23:16] <infaddict> let me ping you some code to calc a proper checksum or any given command
[23:16] <infaddict> you can then use it to check
[23:16] <daveake> As we said earlier, that will be a software serial thing
[23:17] <daveake> TinyGPS doesn't use UBX commands; it was complaining about the NMEA checksum
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[23:17] <infaddict> ah sry dave missed that part
[23:17] <infaddict> yep dont trust anything data wise (esp checksum) with software serial, use proper serial as you have more than enough
[23:17] <Jordan1> okay
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[23:18] Nick change: BrainDamage_ -> BrainDamage
[23:18] <Jordan1> is it not worth me putting in the changed last two values anyway
[23:18] <infaddict> you cant just cut and paste and change a message
[23:18] <infaddict> the last 2 values are tied to the exact message you found them in
[23:19] <infaddict> heres my airborne 1g chars:
[23:19] <infaddict> {0xB5, 0x62, 0x06, 0x24, 0x24, 0x00, 0xFF, 0xFF, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x10, 0x27, 0x00, 0x00, 0x05, 0x00, 0xFA, 0x00, 0xFA, 0x00, 0x64, 0x00, 0x2C, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0xDC}
[23:19] <infaddict> works great on latest uBlox firmware with ACK received to confirm and post checking of actual flight mode
[23:19] <Jordan1> http://postimg.org/image/4aw07e379/
[23:19] <Jordan1> if you look at that image
[23:20] <Vaizki> works great to at least 2 meters tested? :)
[23:20] <Jordan1> haha
[23:20] <Jordan1> i dream of 2 meters
[23:20] <infaddict> works great to parameters i just stated which was ACK received and mode re-confirmed with recall of command
[23:21] <daveake> Please, read the ublox manual for your chip - it will tell you what these values mean
[23:21] <Upu> and please don't use software serial
[23:21] <infaddict> yep if u still need to ask why the last 2 chars are different u dont understand what they are
[23:21] <infaddict> read the protocol pdf on ublox website
[23:22] <infaddict> there is a crucial difference between the 2 messages in your image
[23:22] <Upu> https://github.com/HABduino/HABduino/blob/master/Software/habduino_v3/habduino_v3.ino#L460-L474
[23:22] <infaddict> not just the checksum at end
[23:22] <Upu> oh look snap
[23:22] <infaddict> read the bytes carefully
[23:23] <Jordan1> im trying
[23:23] <Jordan1> im new to this :)
[23:24] <infaddict> no worries, its like spot the difference. you will see something.
[23:24] <Jordan1> ah the 3C
[23:24] <infaddict> yep ;-)
[23:24] <Jordan1> and the 28
[23:24] <infaddict> as we said before, anything in the msg changes, the checksum changes
[23:25] <Jordan1> oh no
[23:25] <Jordan1> LOL
[23:25] <Jordan1> not the 28
[23:25] <Jordan1> so this 3C
[23:25] <Jordan1> is why checksum is 52 E8
[23:26] <infaddict> yes. the checksum is a kind of sumation of all the other bytes. anything changes means a change to checksum. google checksum if you dont know much about them.
[23:26] <Jordan1> im reading up on it now
[23:26] <infaddict> many different methods for calculating them and uBlox adopt a well known one
[23:26] <infaddict> its all described in detail in their pdf
[23:26] <infaddict> its extremely worthwhile reading it. its long but i read it and learned a lot.
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[23:27] <infaddict> http://www.u-blox.com/images/downloads/Product_Docs/u-bloxM8_ReceiverDescriptionProtocolSpec_(UBX-13003221)_Public.pdf
[23:27] <infaddict> thats the pdf for details protocol description
[23:27] <Jordan1> its 222 pages
[23:27] <infaddict> indeed
[23:27] <infaddict> most are details of each message tho
[23:27] <Jordan1> gonna get a drink for this
[23:27] <infaddict> the intro parts are what you need
[23:28] <infaddict> dont worry about UBX and NMEA detailed message layouts yet
[23:28] <infaddict> except the NAV5 command which is what you are trying to do to set flight mode
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[23:35] <infaddict> Here's some simple code I keep online to create a checksum for uBlox. http://goo.gl/XrkuYP
[23:35] <infaddict> Just paste in your message in the variable at top and it will print out the corrected message with checksum
[23:40] <infaddict> p.s. you can probably skip straight to section 20.1.1 of that huge pdf for NMEA packet structure... then 21.1 for UBX packet structure. the NAV5 you are sending for airborne mode is UBX.
[23:40] <infaddict> and with that I bid you all good night. cheers.
[23:43] <SpacenearUS> New vehicle on the map: 03W0WYX - 12http://tracker.habhub.org/#!qm=All&q=W0WYX
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[23:56] <Lunar_Lander> good night!
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[00:00] --- Sat Feb 21 2015