开云体育

Working toward launching my first balloon of any type.? Using some purchased Pi boards.? I plan to turn to the small and light payloads sometime this summer, but we will see how that goes.? Probably about as quickly as my other radio projects.
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73 de AE8AT

We are planning on getting a balloon up this summer. I have been working on software running on a Parallax Propeller and it has been working very well on WSPR mode.

I did originally want to use an Arduino Nano. You have a good code base to work with. I have already made many changes to it and hope to be testing within the week.

The Propeller doesn't require a synthesizer module because I can devote a cog to the transmit function and generate the frequencies directly on an output pin. But the prop is more expensive.

We will weigh the pros and cons of Arduino vs Propeller later.?

Steve, w8an

Steve,?

Hi. Just found your project. My HAB trackers are currently doing RTTY in 70cm band. Swapping the radio module is the only way to convert them to HF. For floaters, it is required we do HF or 2m APRS. Ordered a Si Adafruit board to start testing. At first glance, your code looks a bit naked on the GPS side of things. Will see what results I get.

73

For me the advantage of HF was lower energy consumption and world wide coverage with widely available digital modes. The code is just a starting point not a solution for all situations, which is one of the reasons I choose to share it. The GPS code is simple, the functions are only to set the system time and determine location within the framework of the tiny GPS library. For these particular digital modes to work, accurate timing is needed.?

The components of the code are
1) control the radio
2) read the GPS, with that set the time, location, gridsquare, altitude, if time schedule criteria is met, send transmission.
3) read and calculate battery voltage and ambient temperature