AUX-6 relay - high on power up before boot - any way to have it be low on power up?

ArduCopter Copter 4.1
1

I’m using AUX-6 as a relay for a camera trigger on an Orange Cube and ADSB-IN carrier board.

I noticed that when power is first applied, before ArduCopter boots up, that the relay is high - and is delivering 3.3 volts.

As soon as the boot completes, it goes back to low.

I have RELAY_DEFAULT set to “0” and CAM_RELAY_ON set to “1”. This works fine - but after the boot-up is complete.

I’m thinking that this is a hardware issue - as the software isn’t booted up yet.

But if there’s any way to keep the relay from going high until commanded to do so, I’d like to know how.

Thank you!

2

I was just about to open a topic with this issue, but found yours. I have the same setup as you, but with a regular carrier board and using AUX5.

The RELAY_DEFAULT option only seems to take effect when the initialization sound starts playing, but before that it is always high.

1 Like