On my Pixhawk 2.1 with Here 2 GPS. On mission planner I am showing a lock and position is correct but HDOP is 0 and GPS has a flashing blue light
GPS Hardware Version 2.1 software Version 1.3.1971872918
This is normal on CAN.
There is no HDOP message on the can device.
HDOP is not an great way of checking gps. The EKF uses the velocity innovation to determine quality
Is there any way to tell visually if you have a good lock eg Green led like the serial version
EKF will not pass checks till a good lock is achieved
Thanks for clarifying might be good to have in a future release