Graupner JR SPCM.

26 Mar 2023 19:28 #78242 by FriedSky
Graupner JR SPCM. was created by FriedSky
Hi All.
Before the days of 2.4GHz, Transmitters used to talk PPM, PCM or serial to the RF modules.

Does anyone know how the error detection mechanism works on this protocol ?. e.g. CRC etc.

If you have an old JR transmitter laying around in your junk pile how about some reverse engineering.

The protocol basics are detailed in the attached .pdf.


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