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README.md

RS41HUP (Ham Use Project) - Project Horus Fork

Firmware for RS41 for HAM use.

It is possible to recycle RS41-SGP sondes for amateur radio use without any electrical changes! You just have to build a new firmware (this one) and apply it via a cheap programmer, the "ST-Linkv2" (or alternatives). The modified sonde can now transmit on a user-defined frequency in the 70cm band, with Habhub-compatible RTTY and (better performing) 4FSK telemetry!

Released under GPL v2.

Original Repository: https://github.com/Qyon/STM32_RTTY, though this fork is based on DF8OE's version.

Modifications by Mark Jessop vk5qi@rfhead.net include:

  • Compatability with existing Project Horus RTTY Formats.
  • Removed APRS support - no 70cm APRS infrastructure in Australia, so not really useful to us.
  • Addition of the 4FSK 'Horus Binary' high performance telemetry mode

Compilation

Linux / OSX:

Windows:

(Note, is likely broken - currently targeting Linux / OSX builds)

Use: https://www.wyzbee.com/download/Utilities/Software/CoIDE-1.7.8.exe

And: https://launchpad.net/gcc-arm-embedded/5.0/5-2016-q3-update/+download/gcc-arm-none-eabi-5_4-2016q3-20160926-win32.exe

Programming

Either:

  • Use the ST Micro ST-LINK utility (windows only it seems?), or
  • stlink under Linux/OSX (will need to be unlocked first), or
  • OpenOCD on Linux / RaspberryPi (see openocd_rs41.cfg file for usage) or
  • Use flash.sh with a Black Magic Probe. You will need to modify the path to the debugger's serial interface.

Refer to this file for programming header pinouts.

Configuration

Configuration settings are located in config.h. Modify as appropriate before compiling/programming.

#Changelog

  • 14.12.2016 - Reverse engineeded connections, initial hard work, resulting in working RTTY by SQ7FJB
  • 07.01.2017 - GPS now using proprietiary UBLOX protocol, more elastic code to set working frequency by SQ5RWU
  • 23.01.2017 - Test APRS code, small fixes in GPS code by SQ5RWU
  • 06.06.2017 - APRS code fix, some code cleanup
  • June 2017 - starting with Linux support, making configuration more flexible by DF8OE
  • March 2018 - Addition of 4FSK binary mode support by Mark VK5QI

#TODO

  • Temperature and moisture sensor support (temperature should be the easiest to get going first...)
  • Implementing protocol for using external devices on extension header
  • Configuration via extension header (serial connection) without need for reflashing firmware

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RS41HUP - Firmware for Vaisala's RS41 for Amateur Radio use

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