highaltitude.log.20100610

[00:00] <fsphil> I had visions of me rolling it out on launch day and finding it had disintegrated
[00:02] <stilldavid> store it out of sunlight and moisture, etc...
[00:04] <fsphil> sunlight shouldn't be a problem
[00:15] <fsphil> right, I have to be up unnaturally early. night all!
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[05:00] <griffonbot> @BASE_DePauw: Launch is still looking good. Predicted path from Greencastle to Elizabethtown, IN 65 miles downrange at 120 degrees heading #ARHAB #GPSL [http://twitter.com/BASE_DePauw/status/15824971097]
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[07:54] <earthshine> morning
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[13:53] <griffonbot> @BASE_DePauw: Launch #ARHAB#GPSL [http://twitter.com/BASE_DePauw/status/15848228447]
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[14:18] <griffonbot> @BASE_DePauw: 32 kft #ARHAB#GPSL [http://twitter.com/BASE_DePauw/status/15849643169]
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[14:30] <griffonbot> @BASE_DePauw: 48 kft #ARHAB#GPSL [http://twitter.com/BASE_DePauw/status/15850357222]
[14:44] <griffonbot> @BASE_DePauw: 66 kft #ARHAB#GPSL [http://twitter.com/BASE_DePauw/status/15851085952]
[14:59] <griffonbot> @BASE_DePauw: 82 kft #ARHAB#GPSL [http://twitter.com/BASE_DePauw/status/15851919530]
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[15:13] <griffonbot> @BASE_DePauw: Burst #ARHAB#GPSL [http://twitter.com/BASE_DePauw/status/15852866548]
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[16:55] <griffonbot> @BASE_DePauw: Located high in trees#ARHAB#GPSL [http://twitter.com/BASE_DePauw/status/15859663733]
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[17:43] <cuddykid> Hi Guys, i've seem to have successfully set up NTX2 with arduino, tested with just constant 1.2V into ntx2 (through one pin from arduino and pot divider) and hearing a noise on yaesu radio! (Very happy!! Haha).. my question is though, how to I now get the arduino to send data at the required 50 baud (i think!) to my 2 different output pins (one for space and one for mark).. I've looked on the wiki but haven't a clue where to start! Could anyone help
[17:43] <cuddykid> Thanks
[17:45] <stilldavid> hey cuddykid!
[17:45] <DanielRichman> cuddykid, have a look at http://www.pegasushabproject.org.uk/wiki/doku.php/ideas:notes void rtty_txbit(int)
[17:45] <stilldavid> I stole some code from somewhere, have a peek: http://github.com/stilldavid/high-altitude/blob/master/balloon/balloon.pde#L86
[17:45] <stilldavid> annnnnd that's probably where I stole it from ;P
[17:45] <cuddykid> will have a look at both!! thanks guys
[17:48] <cuddykid> is => http://www.pegasushabproject.org.uk/wiki/doku.php/ideas:notes written in arduino code?! Seems vaguely familiar, but not sure!
[17:49] <fsphil> It's arduino flavoured C
[17:51] <cuddykid> ok!..hmm, all i'm trying to do at the moment is just get "hello world" sent from the arduino to computer (running the fl-digi software) via the ntx2! the code seems very complicated, or is that just me?!
[17:53] <stilldavid> cuddykid, copy the three rtty_* functions then in loop() paste in a rtty_txstring("hello world");
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[17:54] <cuddykid> ok, thanks, and then just change the pins to the ones i'm using for space and mark?
[17:55] <stilldavid> http://gist.github.com/433288
[17:55] <stilldavid> change radio_space and radio_mark to suit your output
[17:55] <stilldavid> (untested code, etc...)
[17:56] <cuddykid> Thank you so much! Will have a play around with it!
[17:56] <stilldavid> just updated the gist, re copy/paste
[17:57] <cuddykid> Then, once i've got that working, is it relatively easy to take serial output of lassen iQ and input into here where "hello world" is?!
[17:57] <cuddykid> thanks
[17:57] <stilldavid> yeah, look around the NewSoftSerial library as well as the TinyGPS library
[17:58] <stilldavid> http://arduiniana.org/libraries/tinygps/
[17:58] <stilldavid> it's the easiest way to get started
[17:58] <cuddykid> ok, thanks for your help, will report back progress sometime soon!
[17:59] <stilldavid> please do :)
[17:59] <cuddykid> btw, can that code just be uploaded straight onto arduino, if i copy&paste into arduino software?
[18:00] <stilldavid> yeah, you should be able to paste it in to the IDE. I didn't test it, of course, so it might bug out
[18:00] <cuddykid> ok, no worries, thanks
[18:00] <stilldavid> but give it a shot, it certainly won't break anything :)
[18:00] <stilldavid> where are you based, cuddykid ?
[18:01] <cuddykid> worcester
[18:01] <stilldavid> ah, cool. most people here are in the UK (6pm) so it's tough to get help during US evening times
[18:02] <stilldavid> just a heads up :)
[18:02] <cuddykid> no, worcester UK! haha
[18:02] <cuddykid> near birmingham!
[18:02] <stilldavid> oh oh. duh. I was thinking maryland or massachusetts or wherever in the US.
[18:02] <cuddykid> haha! yeah
[18:03] <stilldavid> d'oh!
[18:03] <cuddykid> hoping to have 1st launch in summer, if all goes well! got the majority of components, just making it all now!
[18:03] <stilldavid> I just did my first launch, it was heaps of fun! good luck with everything
[18:04] <cuddykid> can imagine! thanks
[18:14] <fsphil> it's very addictive, I'm doing my second one next month
[18:16] <stilldavid> If I can get my butt in gear I'll be doing another one this summer, too
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[18:37] <cuddykid> where do you guys launch from? cambridge?
[18:43] <fsphil> most do I think
[18:44] <fsphil> I don't think CAA permission is needed to launch from there
[18:46] <sbasuita> you need the holder of the permanent notam to be present and call atc
[18:46] <fsphil> ah, I knew it couldn't be that easy
[18:47] <sbasuita> its either ed or Randomskk
[18:49] <fsphil> ah if only I was nearby
[18:50] <fsphil> though so far the caa have been a pleasure to deal with
[18:52] <cuddykid> ok, cool
[18:52] <cuddykid> i think i might try and get notam for my area, see how it goes
[18:52] <cuddykid> if get a nice south easterly wind would be perfect!
[18:56] <fsphil> you need to apply at least 28 days in advance of the launch cuddykid
[18:56] <cuddykid> ok, is it by email or phone?
[18:56] <cuddykid> you don't have to have anything special do you like a liscence or something?
[18:57] <fsphil> --> http://ukhas.org.uk/general:restrictions_legality?s=caa
[18:57] <fsphil> a copy of the form is on that page
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[18:58] <cuddykid> ok, thanks
[18:59] <fsphil> I sent mine of today - I wasn't involved in this bit of the last flight so I'm not sure how it goes from here :)
[19:02] <jonsowman> fsphil: caa permission is required from cambridge
[19:03] <jonsowman> we just have blanket permission
[19:04] <fsphil> aye
[19:04] <fsphil> brb!
[19:12] <cuddykid> ok, got what sounds like "hello world" being sent via ntx2, but have run across a problem. Using Macbook Pro and plugged audio lead from radio into mbp but there is no option anywhere in settings to use this audio, it just says (internal microphone)?! :S ahh! anyone know of solution?
[19:12] <DanielRichman> crank up the volume on your radio and use the analogue hole
[19:13] <DanielRichman> quite a few people have macbooks here I think, but I don't :(
[19:13] <DanielRichman> though seriously the analogue hole will be enough for you to test if it works, I think
[19:14] <cuddykid> ok, it seems to be getting the odd letter but a bit jumbled up :S
[19:14] <DanielRichman> press the reset button on the arduino
[19:15] <cuddykid> it might be because of the probably horribly incompatible antenna (just a piece of wire) from the ntx2
[19:15] <cuddykid> ok
[19:15] <sbasuita> no it wonn't be the antenna
[19:15] <DanielRichman> sbasuita, do you remember the antenna we were testing with before we had any clue what we were doing?
[19:15] <sbasuita> in the same room you'll get s9+ without any antennas
[19:15] <DanielRichman> just don't hit the 5W transmit button :X
[19:16] <DanielRichman> cuddykid, if you want, use file->audio->tx capture to generate a sound file, whch you can send to us (or even encode to ogg or mp3 then send to us)
[19:16] <DanielRichman> so we can have a look
[19:16] <sbasuita> encode to flac
[19:16] <sbasuita> but yeah ;P
[19:17] <DanielRichman> sbasuita, considering it was generated by an ntx2, transmitted over a poor match, out a speaker and into an embedded laptop microphone
[19:17] <cuddykid> ok, it just all jumbled up, the sound doesn't seem that clear, especially as i'm right by it! :/
[19:17] <DanielRichman> volume up.
[19:17] <DanielRichman> find where the mic is and move speaker closer?
[19:17] <cuddykid> danielrichman, no luck
[19:18] <cuddykid> it seems to be too muffled the sound coming from yaesu speaker
[19:19] <DanielRichman> make a recording, or ask google about your mbp audio in
[19:19] <DanielRichman> cuddykid, have you set the settings on fldigi correctly?
[19:19] <DanielRichman> 50baud, the shift so that the two red lines cover the strong yellow lines on the waterfall, 8bit ascii no parity one stop bit?
[19:19] <DanielRichman> 425shift I believe
[19:20] <cuddykid> maybe the settings aren't set properly
[19:20] <DanielRichman> also point and aim the red lines on top
[19:20] <cuddykid> i'll take a look, gotta go now, will look later
[19:20] <DanielRichman> then press the reset button on the arduino to make it chill for a second before trying again
[19:20] <DanielRichman> to resync up everything.
[19:20] <cuddykid> ok, thanks
[20:02] <fsphil> it's possible you have the mark and space bits reversed
[20:02] <fsphil> I did that, spend half an hour trying to figure that one out
[20:05] <DanielRichman> and/or have fldigi set on LSB when you're receiving on USB
[20:05] <DanielRichman> or the other way around.
[20:06] <fsphil> yes, that too
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[20:40] <fsphil> hmm.. ntx2 from last mission wired up .. silence
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[20:50] <cuddykid> DanielRichman; how can i change the LSB/USB settings in fldigi?
[20:50] <DanielRichman> cuddykid, box top left
[20:51] <cuddykid> i see, no, i'm receiving on USB, so that seems to be fine
[20:51] <stilldavid> that's only if you use fldigi to control the radio, though right?
[20:51] <cuddykid> i'll change the mark and space around
[20:53] <cuddykid> right, i've got a sound recording of it in garageband on mac, does anyone have gb? or know how I can export it as a different file?
[20:54] <stilldavid> no GB, but save as or export in the file menu is a good guess
[20:54] <cuddykid> right, managed to save as mp3, is that any good to anyone?
[20:55] <stilldavid> yes! as good as anything
[20:55] <cuddykid> great, will upload to internet now, so people can have a listen!
[20:56] <DanielRichman> stilldavid, no changing from LSB to USB affects how it decodes the RTTY too
[20:56] <DanielRichman> even if you're not controlling the rig with fldigi
[20:56] <stilldavid> DanielRichman, I guess I just got lucky and never had to mess with that then :)
[20:56] <DanielRichman> yah
[20:58] <cuddykid> right guys, its up => http://files.me.com/adamcudworth/re3l0r.mp3 let me know what you think! thanks
[20:59] <DanielRichman> I can't hear anything. Only a very low note
[21:00] <cuddykid> not a (fairly quiet) pulsing type noise?!
[21:00] <DanielRichman> yeah
[21:00] <DanielRichman> i hear that
[21:00] <stilldavid> barely, yeah. try tuning the radio?
[21:00] <DanielRichman> you need to tune up so you get some high pitched tones
[21:00] <DanielRichman> scroll the radio down or up
[21:00] <cuddykid> thats all i'm getting :/
[21:00] <stilldavid> what radio are you using again?
[21:00] <cuddykid> ok, atm its on 434.075
[21:00] <cuddykid> yaesu ft-817
[21:00] <DanielRichman> USB?
[21:01] <DanielRichman> try scanning around a bit. there's an example on the wiki of what it should be like in the tracking_guide (ctrl-f mp3)
[21:01] <cuddykid> yes usb
[21:01] <cuddykid> ok
[21:03] <cuddykid> got the file, ok, i see
[21:03] <cuddykid> do you think if I tuned up frequency it might be like that?
[21:03] <DanielRichman> up or down. Just try it, it won't explode if you mistune it
[21:03] <cuddykid> ok, will do
[21:04] <DanielRichman> don't transmit.
[21:04] <fsphil> don't even plug in the mic
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[21:06] <stilldavid> cuddykid, as the radio gets cold/warm during flight you'll wind up having to return it as the freq will drift a bit anyway
[21:07] <cuddykid> ok, right, tuned up to 434.078 and getting a noise like the recording on ukhas. however there is LOADS of interference, just general crackle :/
[21:07] <cuddykid> any solution?
[21:07] <stilldavid> is there an antenna on it currently?
[21:07] <DanielRichman> does it decode cuddykid
[21:08] <cuddykid> no
[21:08] <DanielRichman> send recording (pweeze)
[21:08] <stilldavid> and is there static when the system is off?
[21:08] <cuddykid> ok, will do a recording..
[21:08] <stilldavid> there might be interference from something else
[21:08] <DanielRichman> it should easily be loud enough to decode
[21:08] <cuddykid> hmm, yeah, very faint high pitch pulsing noise, i'll upload recording..
[21:11] <cuddykid> stupid flash was crashing (for the uploader).. managed to get it uploaded.. link is..
[21:11] <cuddykid> http://files.me.com/adamcudworth/syhn9d.mp3
[21:12] <cuddykid> brb
[21:13] <fsphil> that's the same file?
[21:13] <stilldavid> that's what I thought...
[21:13] <DanielRichman> daniel@desktop:~$ md5sum re3l0r.mp3 Fldigi.mp3
[21:13] <DanielRichman> edd8e1cbfd9b54737348edfb17d0f656 re3l0r.mp3
[21:13] <DanielRichman> edd8e1cbfd9b54737348edfb17d0f656 Fldigi.mp3
[21:14] <DanielRichman> yup ^^
[21:14] <stilldavid> science!
[21:14] <DanielRichman> hrrrm I would have used $ diff but it wouldn't have been as clear
[21:14] <cuddykid> back, :S ooer, its the same file name, but its a different recording, i think! hold on..
[21:15] <fsphil> I used sha256sum .. for that added certainty :)
[21:15] <DanielRichman> :D
[21:15] <DanielRichman> cuddykid, neh is byte-for-byte identical to the original file
[21:15] <cuddykid> ok, will reupload..
[21:15] <stilldavid> might have been and md5 collision or something
[21:15] <stilldavid> now wouldn't that be something.
[21:15] <cuddykid> yeah, uploading now
[21:16] <DanielRichman> you've found a file that is not only in perceivably indifferent to human ears, but a md5 AND sha256 collision, AND valid mp3 data. Now that would be something
[21:16] <cuddykid> right, thats interesting, the uploaded is not picking up my refreshed desktop, its still using one from about 5 mins ago :/
[21:17] <DanielRichman> $ diff -q Fldigi.mp3 re3l0r.mp3 && echo $?
[21:17] <DanielRichman> 0
[21:17] <DanielRichman> busted :(
[21:17] <stilldavid> DanielRichman, and I had my hopes up :(
[21:17] <fsphil> more likely to win the lottery, 5 weeks in a row
[21:18] <cuddykid> ok, very strange, file is ON desktop, but not appearing in uploader :S
[21:19] <cuddykid> all sorted, my bad, was looking in idisk which is synced every few mins! ..
[21:20] <stilldavid> idisk shmydisk, get dropbox :P
[21:20] <stilldavid> public folders, etc...
[21:20] <DanielRichman> I have no idea what that is, but rsync is better.
[21:20] <cuddykid> http://files.me.com/adamcudworth/lgg54u.mp3
[21:21] <cuddykid> i'm gonna use dropbox in future, my mobileme subscriptions up in a few days!
[21:21] <stilldavid> too high pitched :P
[21:21] <DanielRichman> yeah you're at the other end of the scale
[21:21] <cuddykid> oh dear!
[21:21] <DanielRichman> if your 817 is jumping in too-large frequency steps, hit the CLAR button
[21:22] <DanielRichman> and use the bigger wheel
[21:22] <cuddykid> the frequency steps seem fine, as a lot of turning was required to get to this frequency!
[21:22] <cuddykid> yeah, i'm using big wheel
[21:23] <cuddykid> hmm, the problem is the interference, at every frequecy theres a huge amount of interference:/
[21:23] <DanielRichman> also make sure that, if your antenna for the 817 is connected to the front, the front input is selected (IE no capital R on the right hand side of the screen)
[21:23] <DanielRichman> cuddykid, get it bang in the middle; about middle C
[21:23] <DanielRichman> then send us that :P
[21:23] <cuddykid> alrighty! will try the suggestions
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[21:23] <DanielRichman> it certainly sounds promising
[21:23] <fsphil> in saying that, it should receive it fine without the antenna
[21:23] <DanielRichman> idd. I get S7 w/o antenna on either module
[21:24] <cuddykid> danielrichman, on the right side of screen there is nothing apart from top right saying "USB" :S
[21:24] <DanielRichman> good so front is selected
[21:25] <DanielRichman> but doesn't matter either way ^^
[21:25] <cuddykid> ok
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[21:25] <cuddykid> the interference seems to be getting worse :S .. its even quieter now i've just plugged everything back in :/ can barely hear the pulsing
[21:26] <DanielRichman> radio is on loudspeaker?
[21:26] <cuddykid> GOT IT!
[21:26] <cuddykid> i needed to tune down
[21:26] <cuddykid> theres no interference now!
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[21:26] <cuddykid> 434.074 ish!
[21:26] <DanielRichman> yeah if you're badly out I guess AGC would have ramped it up amplifying the inteference too
[21:26] <DanielRichman> decodes?
[21:26] <DanielRichman> if not: recording :P
[21:27] <cuddykid> sounds perfect however only 1 yellow line appearing in fldigi
[21:27] <cuddykid> and hence not decoding properly :/
[21:27] <cuddykid> i'll send recording!
[21:28] <stilldavid> try fine-tuning up if it's on the left or down if it's on the right
[21:28] <DanielRichman> only 1 yellow line? is the yellow line in question in the middle?
[21:28] <cuddykid> its around 3580.6 :/
[21:28] <fsphil> what resistor values are you using?
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[21:29] <cuddykid> urm..
[21:29] <DanielRichman> ok you might need to tune a bit if the other line is off the scale
[21:29] <DanielRichman> you should be able to twist the dial and hear the frequency slide up and down
[21:29] <DanielRichman> rather than jump immediately out of range
[21:29] <cuddykid> can't remember exactly, but around the values that are on alien habs schemematic
[21:29] <cuddykid> ok
[21:29] <DanielRichman> fsphil, supply voltage of 5V
[21:30] <DanielRichman> so is using our values
[21:30] <cuddykid> ok, tuned up and now 2 yellow lines appeared
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[21:30] <DanielRichman> go for it.
[21:30] <stilldavid> now move the red lines and ... profit?
[21:30] <cuddykid> how ever, they're too far apart
[21:30] <cuddykid> the red lines are too narrow :S
[21:30] <DanielRichman> reeeeeecording
[21:31] <stilldavid> did you set the shift to 425?
[21:31] <cuddykid> stilldavid, yes
[21:31] <stilldavid> just checking :)
[21:31] <cuddykid> okay, will record..
[21:31] Action: stilldavid waits patiently
[21:32] <cuddykid> this will have to be last one, i g2g, uploading now..
[21:33] <cuddykid> http://files.me.com/adamcudworth/swhedj.mp3
[21:33] <fsphil> I love that sound
[21:33] <fsphil> sounds perfect
[21:33] <cuddykid> thats what i thought!
[21:33] <DanielRichman> indeed it does
[21:33] <DanielRichman> time to feed it into fldigi
[21:33] <cuddykid> but can't decode :/
[21:33] <cuddykid> ok
[21:37] <DanielRichman> Hello World!
[21:37] <DanielRichman> cuddykid, it works
[21:37] <DanielRichman> cuddykid, I can decode.
[21:37] <fsphil> confirmed
[21:37] <cuddykid> really?! wow! .. my settings must be wrong :/
[21:37] <DanielRichman> cuddykid, the shift is indeed quite wide; not sure why
[21:37] <DanielRichman> I put it on 850 shift just temporarily to decode
[21:37] <cuddykid> baud 50, shift 425, rtty?
[21:37] <DanielRichman> probs would have worked on 425
[21:37] <fsphil> 630 hz works nicely
[21:37] <cuddykid> ok
[21:38] <DanielRichman> fsphil, ah the version of fldigi I have doesn't have the custom option
[21:38] <DanielRichman> fsphil, need to upgrade to 10.04 but haven't bothered yet.
[21:38] <fsphil> it's well worth it DanielRichman
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[21:38] <cuddykid> is it 2 stop bits? or 1?
[21:39] <stilldavid> woot! should be just 1, but will work with either
[21:39] <fsphil> I used 1.5 - but I think fldigi just ignores it anyway
[21:39] <cuddykid> ok, hmm, how come it didn't work my end :S ?!
[21:39] <cuddykid> is it the "receive filter bandwith"?
[21:41] <fsphil> with 425 carrier shift and maximum receive filter bandwidth it might just decode
[21:41] <DanielRichman> 850 it works
[21:42] <fsphil> not here oddly, neither 850 or 425 worked for me without increasing the filter bandwidth
[21:42] <cuddykid> filter bandwith of 1200?
[21:42] <fsphil> unless the default bandwidth was greater in the older version?
[21:42] <fsphil> I used 200
[21:42] <fsphil> and shift 425
[21:42] <fsphil> worth a try
[21:43] <cuddykid> ok, will do, glad its working, just need to get fldigi working myside! g2g now, thanks for all the help
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[21:44] <earthshine> o/
[21:44] <fsphil> soo close
[21:44] <fsphil> hehe
[21:44] <fsphil> just needs to fiddle with his resistors
[21:45] <DanielRichman> indeed
[21:45] <stilldavid> woot, what a good feeling, though :)
[21:45] <stilldavid> alright, brb
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[00:00] --- Fri Jun 11 2010