I keep looking, but I cannot find a straight answer on how to use my r/c transmitter to control the onboard relay. I enter CLI and go into setup- type 'tune 9' and it shows a change from 0 (.015) to 1 but does not activate the relay. I have searched the forum pages repeatedly, but its all vague on generic use. I do not want to activate the relay just through the APM- I want to turn on my lights at any time via my transmitter without the computer. Are there options built in for this? Please help...
ArduPlane or ArduCopter? This is not a feature in ArduPlane. Don't know about ArduCopter. If you just want to turn lights on from your rc transmitter, you don't need to run that through APM at all - there are RC LED control boards you can use for that.
Arducoptor in this case. I have a few 1w cree xlamps that I want to switch on remotely- and off to save power. The relay was one of the reasons (among many) I got the Ardupilot hardware- I don't want to buy and fly more electronics if the AP can do it.