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.
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This is a fork from github.com/darksidelemm/RS41HUP (not longer supported)
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Major adds:
- Horus V2 protocoll (32 bytes)
- GPS-Watchdog: reboots RS41 if GPS gets lost longer then timeout as defined
- GPS-TX Sync if Fix is available every minute
- Second frequency if defined. changes every TX intervall between both
- MORSECODE: Transmit additional data like Alt, QRA Locator, Sat-Count, Volt, CPU-Temp - or NO GPS if jamming
- GPS-TX Sync now with offset after the TX Intervall. e.g...
- if delay 60s and offset 10s: tx on 00:00:10 / 00:01:10 / 00:02:10 ...
- if delay 30s and offset 10s: tx on 00:00:10 / 00:00:40 / 00:01:10 ...
- if delay 15s and offset 10s: tx on 00:00:10 / 00:00:25 / 00:00:40 ...
- APRS_1200 Baud added. Ratio can be defined how often to send a packet
- Meaning of packet codings:
- Sample: 11:35 DF7PN-7/WIDE1-1>APZQAP>UI,?,F0 (1198 baud): !4953.14N/00804.40EO/A=000846/P43S7T6V6 RS41 Balloon
- /A=000846 is altitude in feet. Thumb rule: divide by 3
- /P43S7T6V6 is P=PacketNbr, S=SatCount, T=internalTemperature, V=Volts (div by 100) here 6 = 0.06 Volt
- ==> do not forget to add the new files to your coIDE project file
- aprs.h; aprs.cpp; QAPRS*
- Extended accuracy of the coordinates with DAO
- DAO adds after the APRS_COMMENT a sequence of !W??! where the ?? are some more decimals of the position
- see for more info: http://www.aprs.org/aprs12/datum.txt
- config.h : #define APRS_DAO 1 DAO is active // #define APRS_DAO 0 no extension is added to comment - packets are 5 bytes shorter
- Custom_field_list: provide your own Data in Horus-V2 spare bytes
- The V2 Protocol provides some bytes for own use. There is an default list if you do nothing.
- Normally the webbrowser shows in left panel: Temerature, External - Relative Humidity, External and Pressure, External
- Some of us wanted to provide instead a constant : Flight_number and SondeType.
- See config.h file for more infos at the defines USERFLAG_A and _B how to use them.
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This RS41HUB is recomended for floating flights with battery. It needs less mA then the RS41ng Version.
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If power does not matter, than have a look on RS41ng.
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RS41ng is created by https://github.com/mikaelnousiainen/RS41ng.
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An Version with some special needs will also be found on https://github.com/whallmann/RS41ng
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
- A decoder for the 4FSK mode is available here: https://github.com/projecthorus/horusdemodlib
- Information on the 4FSK mode's performance is available here: https://www.rowetel.com/?p=5906
- Grab the GNU ARM Embedded toolchain from here: https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads
- Extract the files as described on the download page
- Use local GIT to clone the RS41HUP_V2 project
- Within the RS41HUP_V2 directory:
- CMakeLists.txt is prepared for Ubuntu, maybe edit is nessesary
cmake .make
- Flashing: (premisse you intalled openocd before)
- connect the sonde to the ST-Link adapter and power it on
- in the RS41HUP_V2 dir start ./openocd_flash.sh. This unlocks the RS41 memory and push the RS41HUP.ELF file with a verify
Wolf: used to edit and compile the CooCox CoIDE - this works fine and it also uploads to the STM32 Board with ST-Link dongle. Flashing: right near the compile button in the toolbar there is the download button to the hardware. Try it. Tooltip is your friend
Use: https://www.softpedia.com/get/Programming/Coding-languages-Compilers/CooCox-CoIDE.shtml
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.shwith 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 settings are located in config.h. Modify as appropriate before compiling/programming.
Telegram Chat: feel free to join us at https://t.me/horus_flights
#Changelog
- 31.01.2024 - CONFIG.H and MAIN.C - use your own Custom_field_list
- 17.01.2024 - APRS.cpp - DAO extension added for more accuracy of position reports
- 14.01.2024 - CMakeLists.txt: corrected the TOOLCHAIN_DIR line 12 to work under Ubuntu
- 10.01.2024 - APRS_1200 added again to the modes, Ratio can be defined, a different frequency can be given
- 04.01.2024 - Sync with GPS: added to configure an offset for less TX collisions on multi flights on same frequency
- 31.12.2023 - Checked and extend MORSECODE data
- 26.12.2023 - Added choice for 2nd TX frequency: if activated, changes between each tx intervall.
- 26.12.2023 - Added GPS-Sync: TX starts every full minute if gps-fix is availble
- 23.12.2023 - Added a GPS-Watchdog: set a GPS-timeout after this the cpu makes a restart (GPS-jamming)
- 23.12.2023 - Added Horus V2 32-Byte Format. Set by compiler switch in config.h
- 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