One of the first M17 transmissions using a modified Nokia 3310/3330. Not too complicated using libm17. There’s a wiki article on how to generate M17 baseband with the library.
The transmission was received with an RTL-SDRv3 on 433.475MHz – IARU R1 designated M17 calling frequency! 🙂
Sure, why not? Just replace the mainboard with the one Woj SP5WWP designed, flash it with the sample firmware, et voilà .
SA868 “open edition” 1W UHF module by NiceRF is used. The module runs OpenRTX open-source firmware.
Please note that the project is very early in its development and the functionality offered is very limited. Nothing beyond text entry has been tested, but transmitting M17 should be straightforward to implement.
Due to technical problems with the feed line and, hopefully temporary, lack of funding, we were forced to disable SR5MS M17 repeater site in Nowy Dwór Mazowiecki, Poland. This was the first repeater to support M17 mode and for a long time remained a true proving ground for the Protocol.
The SR5MS repeater requires an upgrade from a legacy configuration based on a Motorola MTR2000 to a modern, RRU-based setup.
We will keep you informed about the status of this repeater.
We are still working on our new website – currently moving content from the old homepage. Some articles are outdated and will be removed, other need updates. Thank you for your patience. Stay tuned!