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 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
Maybe you have to set correct path to gcc-arm-none-eabi in CMakeLists.txt.
cd into main folder
cmake .
make
All configs in config.h
SEND_RTTY
Optionally send RTTY packet everyTX_DELAY
msSEND_RTTY_<value>
Include into the RTTY packetRTTY_CALLSIGN
RTTY callsignRTTY_COMMENT
RTTY commentRTTY_WWL
Send WWL instead of the RTTY commentPAIR_COUNT
World Wide Locator pairs (precision)RTTY_FREQUENCY
RTTY frequency in MHzRTTY_DEVIATION
RTTY shift configurable in 270Hz stepsRTTY_SPEED
RTTY speed in baudsRTTY_7BIT
Use 7 bit RTTYRTTY_USE_2_STOP_BITS
Use 2 stop bitsSEND_APRS
Optionally send APRS packet everyTX_DELAY
*RTTY_TO_APRS_RATIO
msAPRS_CALLSIGN
APRS callsign, 6 characters. If your callsign is shorter add spacesAPRS_SSID
APRS SSIDAPRS_DISPLAY_TABLE
APRS Display TableAPRS_DISPLAY_SYMBOL
APRS Display SymbolAPRS_COMMENT
APRS commentAPRS_FREQUENCY
APRS frequency in MHzRTTY_TO_APRS_RATIO
Number of RTTY frames between each APRS frameSEND_MORSE
Optionally send Morse message everyTX_DELAY
*RTTY_TO_MORSE_RATIO
msMORSE_PREFIX
Start of the Morse message (DE )SEND_MORSE_<value>
Include into the Morse messageMORSE_SUFFIX
Optional end of the Morse message (ar^)MORSE_WPM
Morse speed in words per minuteRTTY_TO_MORSE_RATIO
Number of RTTY frames between each Morse messageTX_POWER
Power 0-7, (7 means 42.95 mW@434.150 MHz measured on E4406A)ALLOW_DISABLE_BY_BUTTON
Allow disabling device using buttonTX_DELAY
Delay between RTTY frames in millisecondsLED_ENABLED
Optionally /disable LED blinking (takes effect after approx. 10 minutes)
Have a nice day ;)
- 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
- November 2018 by OK1TE
- Optionally alter the RTTY comment with the World Wide Locator
- Made the RTTY packet content configurable
- Optionally turn off RTTY or APRS
- Optionally turn off LED blinking
- Added Morse (CW) support
- 10.01.2020 - Configurable APRS Display Symbol
- 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