I am trying to use an Arduino Mega 2560 + GPS module + IMU module on a rover (because I had all this stuff and I don't have a Pixhawk setting around). I followed the instruction, downloading the latest Ardupilot software ant the special Arduino IDE, etc. Everything builds and loads/verifies fine.
I then go into MP to configure the rover and I don't get any MavLink responses from the Arduino. MP times out.
I feel like I am really close to getting this working, What else should I have to do?