altusmetrum April 2021

altusmetrum@lists.gag.com

15 participants
11 discussions

Does Telemetrum play well with other altimeters for redundant dual-deploy?

by burnwuffie＠aol.com

In particular, does a Telemetrum transmitting on 70 cm. interfere with a Perfectflite Stratologger SL-100? Anyone have any experience? Also saw a video about a "lightning bug" dual-deploy altimeter (https://www.youtube.com/watch?v=IroVZC5ZbF4&t=10s) that uses a step-up transformer to produce an arc that lights charges without e-matches. Interesting, but I wonder how well that would work with a Telemetrum in the same rocket.

1 year, 10 months

Tripoli NSW Mullaley

by Norman McGeoch

Kind Regards Norman McGeoch 0451 463 961 Begin forwarded message: From: Norman McGeoch <normanmcgeoch(a)hotmail.com> Date: 7 April 2021 at 10:19:18 pm AEST To: Bdale Garbee <bdale(a)gag.com> Subject: Tripoli NSW Mullaley Hi Bdale, Could you please add to launch site list for Telemetrum maps. Tripoli NSW, Mullaley, Australia -31.15119325571859, 149.91797774321296 and Tripoli NSW, Whalan, Australia -33.76059894547595, 150.7975583540048 -- Regards Norman McGeoch 0451 463 961

1 year, 10 months

Beep Pitch

by Terry

Is there anyway that I can lower the pitch of the mode beeper on my EasyMini. The two available settings are so high that I have a hard time hearing them. I would love it if they could be configured to have a pitch somewhere between 500 and 1000 Hz. Terry

1 year, 11 months

TeleMega Accel Plus and Accel Minus values

by Gary Lech

Greetings, Can anyone say what the Accel Plus and Accel Minus values are. I couldn't find anything in the manual that discusses them. Clueless, Gary TRA/NAR L3 - WA7GL

1 year, 11 months

TeleBT Bluetooth Connection Issues (Macbook)

by AlbyVA

Does anybody know of any problems with Macbooks and Bluetooth connections with the TeleBT being a problem? The issue I'm having is that with my Macbook I can see the TeleBT, Connect to it, but it does not remain connected. Now I first thought this could be a problem unique to my Macbook. So I used my work Macbook and it has the same problem of not holding the bluetooth connection. In comparison, using my cellphone (Galaxy S20 Ultra) it connects and remains connected to the TeleBT. My wife has a Microsoft Surface and it connects to the TeleBT and remains connected. So what on earth is going on with MacBooks and Bluetooth with the TeleBT? [image: Screen Shot 2021-04-10 at 5.07.46 PM.png] [image: Screen Shot 2021-04-10 at 5.09.38 PM.png] Thanks, Alby

1 year, 11 months

Getting at the GPS data stream

by Stewart Campbell

Hi, I am setting up an antenna tracking system that needs a data stream out of the TeleBT (or attached computer) that I can feed to the antenna tracker to have it follow the rocket automatically during flight. How do I go about getting something like that out of the TeleBT or PC please? I need something like a NMEA GPS stream, or similar. NMEA would be great as the AAT will decode this without additional tweaking of the packets. The data is obviously there, I just need to port it out somehow. Thanks Stewart

1 year, 11 months

Re: [altusmetrum] altusmetrum Digest, Vol 112, Issue 6

by Stewart Campbell

1 year, 11 months

Can I get AltOSDroid to work on this thing.

by Larry Gegel

I will begin by admitting that I don’t know know much about Android as I am more of an Apple person and really try to avoid anything Google but, I have an DJI CrystalSky Android device used to fly a DJI drone and given it’s great screen brightness it would be great to be able to put AltOSDroid on it if possible. It’s running a bare bones version of Android 5.1.1 I can not get any of the Google Play stuff to work on it but have managed to get the Amazon app store to work. It does not have bluetooth, I don’t know if a USB bluetooth device would work or not. It has 3 USB ports. One A, one micro and one USB-C so using it wired might be easier than trying to get bluetooth to work. Any thoughts on if this can work and if so how? Larry

1 year, 11 months

Re: [altusmetrum] Getting at the GPS data stream

by Larry Gegel

Stewart, I’d love to hear about the solution you come up with. I’ve been thinking about designing something myself. I was planning to use the output from a TNC rather than depending on getting the data from the TeleBT or TeleDongle. I was planning to mount the antenna to the roof of my Jeep when at the field so I figured I’d just take the TNC output from the Kenwood TM-D710G I have mounted in the Jeep. Larry > On Apr 8, 2021, at 4:47 AM, Plugger Lockett <plugger.lockett(a)gmail.com <mailto:plugger.lockett@gmail.com>> wrote: > > Hi Stewart, > > You can configure your TeleMega to transmit APRS alongside the AltusMetrum telemetry stream. If you did that you could leave your TeleBT as is and instead use an APRS TNC to output the APRS data via serial into your computer. I run all my GPS enabled Altus Metrum products this way as it's a fully independent telemetry link (excluding the transmitter of course) which can be useful for troubleshooting from time to time. The only downside is that if you enable APRS beacons you won't have Altus Telemetry whilst the APRS packet is being sent as the transmitter can only do one thing at the time. To my understanding it doesn't interrupt the data logging on-board though, only the in flight telemetry stream. > > I hope you're well mate. > > Cheers, > > drew > > On Thu, Apr 8, 2021 at 2:38 PM Stewart Campbell <stewartcampbell(a)optusnet.com.au <mailto:stewartcampbell@optusnet.com.au>> wrote: >> Hi, I am setting up an antenna tracking system that needs a data >> stream out of the TeleBT (or attached computer) that I can feed to the >> antenna tracker to have it follow the rocket automatically during >> flight. How do I go about getting something like that out of the TeleBT >> or PC please? I need something like a NMEA GPS stream, or similar. >> NMEA would be great as the AAT will decode this without additional >> tweaking of the packets. The data is obviously there, I just need to >> port it out somehow. >> >> Thanks >> >> Stewart >> >> _______________________________________________ >> altusmetrum mailing list >> altusmetrum(a)lists.gag.com <mailto:altusmetrum@lists.gag.com> >> http://lists.gag.com/mailman/listinfo/altusmetrum <http://lists.gag.com/mailman/listinfo/altusmetrum> > _______________________________________________ > altusmetrum mailing list > altusmetrum(a)lists.gag.com <mailto:altusmetrum@lists.gag.com> > http://lists.gag.com/mailman/listinfo/altusmetrum

1 year, 11 months

TeleMini v3.0 USB connections

by Bdale Garbee

Chris Brown <root(a)tx-rx.org> writes: > I would be interested in connecting with USB. Can you please ask Keith to > provide the details? Keith and I just talked this through. Conceptually, it's easy. In practice, it's really fiddly, because what you have to play with are 3 small holes in the board on 0.050 inch centers. I'm going to CC our mailing list on this reply so this becomes more general knowledge. The question for those seeing this for the first time, is how to use USB to configure a TeleMini v3.0 board? Leaving the micro USB connector off is one of the ways we made TeleMini fit in an 18mm tube. But the main system on chip has USB available still, so when he laid out the board, Keith brought the required pins out, thinking it might be helpful in debugging or something, and our software should know what to do if it sees a TeleMini show up on USB. On one edge of the board (see attached photo), there are 6 holes in a row, one of which has a square pad, though you really have to squint at it to see which pad that is. It's the third pad in from one end, and has 2 round holes on one side and 3 on the other. The side with two is what you care about... they are the USB plus and minus data lines. 3 connections will do it, GND / D+ / D-. To actually connect to these holes, the quickest hack is probably to take some existing USB A to mini or micro B cable, cut the B connector off, then carefully strip the outer jacket, strip the conductors, twist and tin their stranded leads, and just stick them into the appropriate holes. Note that the usual color code for such cables is black for ground, red for 5V (avoid like the plague getting that near our boards!), green and white for the data lines. On the cables we buy for TeleDongle, et al, green is D+ and white is D-, but sadly not everyone seems to get that right who sells cheap cables. I've never seen anyone mess up the red and black wires. Fortunately, if you get the data lines reversed, it won't hurt anything, it just won't work. It's going to be a bit of a challenge to keep everything making contact long enough to talk to the board. You might consider finding some 50-mil pitch header pins to solder the wires to so you have a single thing you're putting in and out of the holes. Or maybe some micro grabbers on each wire? If you come up with some great solution, please let me know. In any case, once you have the USB port wired up, with a battery and power switch hooked up to the board it should show up as a USB device on your computer and you should be able to use altosui to configure it just like any of our other products. Have fun! Regards, Bdale

1 year, 11 months

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altusmetrum April 2021