Built a number of identical units with Here+ and they all work well with Arducopter 3.6.12 and 4.0.3. Bought ten more and they will not calibrate with 4.0.3, all systems needed to be downgraded to 3.6.12 in order to calibrate. Any insights appreciated.
Can you tell more about how are they not calibrated?
Did they stop filling the green bar? never finish even reaching the end of bar? or etc?
Did you calibrate them on the same autopilot?
We have tried them on multiple aircraft with version 4.0.3. Using both Mission Planner and QGroundControl. There are multiple symptoms. In QGroundControl bar goes to full then starts back at beginning. In Mission Planner, bar only gets about 1/3 along and then never reaches the end.
Did you update the ublox chip on Here+?
Yes, but only to revision 1.30
Can you try to update to 1.40 and see if it works?