Hi,
I'm trying to develop a HAB project. I have found some "ready-to-fly" soluction like Habduino or Trackuino. The point is that I 'm trying to learn how it works from the bottom so I'd like to build the same learning the concepts.
I have an Arduino Uno and a Radiometrix HX1. I have followed the instructions on this link to achieve a simple RTTY communication with an SDR dongle correctly.
The path I am trying to achieve is the following:
- Make some (any) transmission with the HX1 and some Arduino sketch and receive it with the SDR dongle (done)
- Make a transmission with the HX1 and the Arduino, receive it with the SDR dongle and decode it using some software like qtmm (fail)
- Make a transmission with the HX1 and the Arduino, receive it through a Digipeater and check in the http://es.aprs.fi/ (did not try yet)
- IWhen previous point goes well, try again using a car (did not try yet)
- When previous point goes well, try again using a real non-commercial PPL plane (did not try yet)
I'm stuck in the transmission to decode with QTMM (second point). I really can't find well how to do it, what code should I write. I have also read the APRS spec http://www.aprs.org/doc/APRS101.PDF and I understand more or less the "string" I want to send but I still don't understand the way.
I have good skills in programming and not bad in electronics but I'm starting to feel very desperate with this. Can anyone point me a bit where to look, what to read to achieve it?
Thanks!