sorry, in my original topic i do not categorize it , so i post it again in bluerov2 and ardusub, this problem as below:
i have installed ardusub on px4, during my first start, the qground let me to calibrate compass sensor, i following the instruction to rotate the rov at random direction, but it come out tether information and the compass calibrate stop and process bar does not going on , i do not know what’s matter with this, anybody can give some advice will be apprecicated, thanks a lot.