Thanks you very much for your complete and instructive troubleshooting guide! :) I can set up my Xbee system as it follows:
-APM 2.6.1 (Fairly similar to APM 2.5)
-Arduplane firmware V3.2.3
"Hi Harald,
Very nice post! with my colleagues we are developing an Autonomous Submarine Vehicle (AUV) and we are very motivated doing it.
The main issue is the communication between the user and the AUV since it doesn't have an umbilical cable (i.e…"