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Frsky Telemetry on Matek F765

Hey all,

I’m a bit stuck here. I can’t get my F765/R9MM to send telemetry to my transmitter. SmartPort is connected to SERIAL1, protocol is Frsky SPort (4). I’ve tried it with Plane 4.0.5 and 4.1.0_dev. Tried using both the uninverted and inverted SmartPort connection, but since it’s an F7 this shouldn’t matter anyway. Tried manually setting the SERIAL1 options to inverted Tx, no luck.

We can exclude any wiring or hardware issues, since it works without issue with iNav. I’ve got a similar configuration (different FC though) on a quad where it works as well.

Any ideas?

Cheers, Oli

Pretty sure I cant help but if you did not check this out, seems like F765 is different from other Matek FC in terms of telemetry.

Hey thanks for the tip. I’m currently using it with Smartport, but I’ll try an FPort configuration and report back.

I have success in installing Yaapu program on my transmitter Taranis 7Q
The script was tested on the R9M FLEX FCC module and the Matek 765 WING flight controller and the Taranis 7Q FW 2.3.5 Open TX transmitter.
To connect to the Sports of resiver R9, I made an inverter (adapter) on the on the BC547 transistors, to obtain signal levels on Rx Tx 3.3 B applied the linear regulator LOW DROPOUT VOLTAGE REGULATORS LM2950 3.3 V
Installation options in The Matek 765 WING (UART 1 for Matek matches SERIAL2 ARDUPILOT) :
SERIAL2_PROTOCOL 10 FrSky SPort Passthrough (OpenTX)
SERIAL2_BAUD 57frskyinvert

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