Firmware for RS41 for HAM use It is posible 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 adaptor "ST-Linkv2". Modified sonde now transmits on defineable frequenca in 70cm band GPS and telemetry data in FSK RTTY format which is used by HAB projects and additionally it transmits APRS packets on a seperately defineable TX frequency.
Released under GPL v2
Use: https://www.wyzbee.com/download/Utilities/Software/CoIDE-1.7.8.exe
cd into main folder
cmake .
make
All configs in config.h
CALLSIGNRTTY callsignAPRS_CALLSIGNAPRS callsign, 6 characters. If your callsign is shorter add spacesAPRS_SSIDAPRS SSIDAPRS_COMMENTAPRS commentRTTY_TO_APRS_RATIOnumber of RTTY frames between each APRS frameRTTY_FREQUENCYRTTY frequency in MHzAPRS_FREQUENCYAPRS frequency in MHzRTTY_DEVIATIONRTTY shift configurable in 270Hz stepsRTTY_SPEEDRTTY speed in baudsRTTY_7BITUse 7 bit RTTYRTTY_USE_2_STOP_BITSuse 2 stop bitsTX_POWERPower 0-7, (7 means 42.95 [email protected] MHz measured on E4406A)TX_DELAYDelay between frames in millisecondsALLOW_DISABLE_BY_BUTTONAllow disabling device using button
Have a nice day ;)
#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
#TODO
- Adding support for EmbiTZ IDE
- Adding support for platform independent IDE Eclipse
- More APRS config options
- Temperature and moisture sensor
- Pressure sensor
- implementing protocol for using external devices on extension header
- Configuration via extension header (serial connection) without need for reflashing firmware
- Possibly add configuration "wireless" using RFID loop present in sonde