Can't control GPIO Pin 81 on Speedybee F405 Wing

[Rusty_Jones (John R)]

So… I have 4 Speedybee F405Wings, two full size, and two minis. I would like to be able to use the procedure described here to control the power to my Avatar digital VTXs so they don’t overheat while the GPS is warming up. I followed the procedure, although used Relay1 instead of Relay2. Still set the RELAY1_PIN to “81”. I didn’t set the RCx_OPTION as I was just testing, and was going to use the RELAY setting from mission planner to set the replay High and Low. I tried this on both my full size and Mini F405Wings.

I did a little reading on the Speedybee website, and I do not believe the ‘Mini’ version of this flight controller can control the VTX power supply as there are only 2 options for feeding power to the VTX, either directly from the battery, or from the 5V4A Servo BEC, default is direct, and that is where I have it. But it still didn’t work on the full size flight controller “F405Wing APP”. Both full sized flight controllers were purchased in the last 6 months.

Any suggestions, ideas?

Thanks
Rusty

[Jai.GAY]

@Rusty_Jones

control the power to my Avatar digital VTXs

Do you think voltage to Analog VTX is controllable but not digital VTX?
May be you like to verify with a voltage meter on Analog VTX 9V pin.

@Rusty_Jones

I followed the procedure, although used Relay1 instead of Relay2. Still set the RELAY1_PIN to “81”. I didn’t set the RCx_OPTION

Did you change it to 28? Why don’t you set up the RCx_OPTION and do a test from RC first?
And have you tried using their Ardupilot build firmware?

RELAY1_PIN = “81”
RC10_OPTION = “28” (Relay1 Control)