If you want to connect a relay of some sort (something that accepts a low/high signal, like a camera control) to a PWM output (the servo outputs), you need to do a few quick things. The actual numbers will vary depending on your FC, but here’s what worked for me with a Matek F405-Wing:
- Set the channel you want the relay to trigger on as a controller for the first relay (here I’ll assume you want to control the first relay on channel 11):
- Set the pin number for the relay you want to control. This is a bit fuzzy, it depends on your flight controller, but try a few out. This is what worked for me, for S6 on my F405-Wing:
- Set a servo to act as a GPIO output. I’m assuming here you want
SERVO6, though I’m not quite sure how the servo selection maps to the
RELAY_PINselection above. For me,
If you’re amazingly lucky, you should be all set. If not, you need to play with the
50 in the
RELAY_PIN parameter and the
6 in the
SERVO6_FUNCTION until something works.
Last updated on September 11, 2021. For any questions/feedback, email me at email@example.com.