I’ve just discovered that with ELRS, channel 5 is restricted to two outputs only. (one high, one low)
According to what I’ve read, this is because ELRS expects channel 5 to be used for arming.
This presents a problem with PX4 flight modes - which defaults to channel 5 for flight mode selection.
I get it - PX4 chose channel 5 first - and as the majority of ELRS users don’t care about PX4, they don’t care about this issue.
But for new PX4 users who are setting up their first radio - this will cost mass confusion. I know because I’m an experienced ardupilot drone builder who’s making his first PX4 build - and I wasted hours trying to figure out why my channel 5 EdgeTX mixes don’t work for flight mode selection using a three position switch.
ELRS won’t change to benefit PX4. But because ELRS is rapidly becoming the protocol of choice, there should at least be some sort of caution in Qgroundcontrol warning of this issue on the flight mode setup screen.
Any other channel work. I’m now using channel 12.