I'm new in the APM2 world, and I have some trouble between APM2 and my Futaba PPM Sum receiver.
I activated PPM sum on the board (solder between PPM and CH5 pads), but no luck with it, no way to get a valid signal.
Do you have a solution? I prefer dealing with only one wire between APM and receiver...
With a classic 7 channels receiver I have some success with Stabilize, Alt hold, loiter (+-). Acro mode is a NoGo for the moment due to real sloppy flight - cannot find the right P for that in the Arducopter mission planer.
Thanks for help,