What a Strange… I am missing something, and I cannot arm either… Currentyl these are my 2 issues. I come from betaflight, I have 4 quads setup in betaflight, but Arducopter is totally new for me.
I followed the instructions but I do not receive Voltage values, and I am not able to arm. This is quite difficult than BT or INAV. :S
Finally check
Servo blh poles to the number of poles of your motors.
I have the same configuration and it is working for V, rpm and esc temp, but I cant read current. I think it is a fault of the sensor but maybe I am also missing something.
If you can’t read current thru telemetry then the 4in1 does not have a current shunt resistor on each ESC on the board. This type typically has a shunt resistor for total current and it’s output is analog voltage on a sperate pin.
Now everything is solved. At least basics setup, I can arm motors, disarm, and basic telemetry. Next steps is to fly, and test different flight modes… Another story.