I've looked through and don't see that my issue has been addressed.
I'm using the 3DR Radio modules with the Ardupilot Mega 2.5 and have had no issues connecting to the Mission Planner (57600).
For some reason I can't seem to get it to work with HK's GCS...
I have data being recieved (Serial Data tab) but almost every line is 'Unknown Message' and the GPS Type in the com port area flickers between 8 and 12% which I assume is pretty much nothing.
No useable data seems to be obtained through the link...
I have of course selected 'Ardupilot (Mavlink) in the configuration tab of HK's GCS and even tried ticking the 'Mavlink' boxes in the 3DR settings in the Mission Planner..
Any Ideas?? I'd love to get HK's GCS working.
HK GCS uses Mavlink 0.9 and APM is now using Mavlink 1.0, and they are not binary compatible. Until HK is updated you would have to use a FW version of APM that is based on Mavlink0.9, but that quite an old version now.
Did you solve the problem?
I am using APM 2 and same problem happened to me.
Please if you have any suggestion let me know.