Mission Planner-3DR radio Failing - How To?

You will need to tell ardupilot to inject to your GPS, to do so change the GPS_INJECT_TO parameter in mission Planner.
reach has at least four known bugs that mess up integration with ardupilot. I already corrected them, on my public github repository but Emlid has not merged the fixes yet, so reach does not integrate that well with ardupilot:

  • hdop is messed up so dual GPS does not work (although recommended by Emlid)
  • horizontal and vertical accuracy information is also messed up (again affects dual GPS)
  • speed accuracy information is missing
  • Ground course calculation is bogus wrong signal and 90deg offset, (EKF will get confused merging the information with a compass)
  • GPS timestamps are messed up in versions prior to reach 2.5.2

On Monday if I get some time I can post screenshots, but like I said, even when you inject data, it still does not work correctly until those bugs get solved. Apply pressure on Emlid, maybe then they will merge the fixes, and it will start to work like advertised.