I want try use FrSky R9M with Turnigy TGY 9X (Atmega64) with Er9x-FrSky Telemetry
I know that TGY 9X is quite old stuff but at this time I'm not able to buy something else. Previously I had FrSky DJT transmitter and D4R-II, and telemetry work fine. I have MAX3232 converter inside, and outside cables with connector for RS232 in DJT module.
MAX3232: RS232 cable outside: Now I use R9M transmitter wit R9 receiver.
As MikeB wrote in this thread:
For the EU version:
Use the XJT(PXX) protocol and the R9M will operate in 25mW, 8 channel mode with telemetry.
Use the PPM protocol and set the switches on the R9M to select 200mW or 500mW output. You don't get telemetry with either of those.
The only configuration you don't get is 25mW, 16 channel with telemetry.
For the international version, XJT will give 10mW with telemetry. Use PPM and the switches for other powers, you won't get telemetry.
I'll see if I can add anything, but the '64 has very little flash space left (around 400 bytes).
I put R9M module in TGY 9X and change protocol to XJT and BIND to receiver R9 using BIND option. Binding was successful and RC channel start to work via SBUS. And I connected RS232 same as in DJT module (Rx Tx 5V GND). But telemetry don't work.
So I have some questions:
1. Telemetry work only on Smart Port module? So should I connect Smart Port Output from R9M module to input(to Rx) of MAX232? Or should I connect in another way?
2. Telemetry of signal (Rssi & Tssi) should work if SmartPort is not connected to R9 receiver?
3. I use Pixhawk wit Ardupilot, with DJT & D4R-II I used option "3" in uart options "FrSky D, See FrSky Telemetry", so should I use another option in here?
"4"-FrSky SPort or "10"-FrSky SPort Passthrough (OpenTX)
https://ardupilot.org/plane/docs/common ... tions.html
I know that on receiver side I should connect in that way:
4. Frsky R9M and R9 modules has ACCST 868Mhz EU firmware as provided by the seller. As i read about this modules if module will have ACCESS firmware I shoulden't be able to run anything on TGY9X? It's true?
If no - how I can check which firmware is installed?
I have er9x-r820 with FRSKY MOD: