"Hi, Randy! Thanks for your work! A few days ago we have tested optflow functionality and found it perfect!
Before that we had some unsuccessful tries with Copter-3.3.1 and Copter-3.4-dev compiled manually from github (arming fail: need 3d fix).
"Oleg, but you must understand that this solution can not be used together with the hardware solution proposed by Dmitriy. Such a huge capacitance allows to keep sensors power supplied all the time even between battery replacement. But there is a…"
Did you manage to arm without GPS-module on the board? For example, can you totally disconnect the GPS-module and arm the copter with px4flow+lidar or you still need the 3dfix in the home position?"
"Hi! I think we have found the real cause of the crash. Andre was right pointing on the problem with IMU2 with wrong accel data (rather, the complete lack of data). ARMING_CHECK was totally disabled, that is why we didn't get BAD ACCEL HEALTH on the…"
"Thanks much, Dmitriy! Your solutions work fine! Deystvitel'no pomoglo! ;-)
It looks as if I replaced the capacitor with the resistor :) but don't worry, the capacitor is on its place.
So, now the "bad accel health" issue is almost gone. And it's…"
"Andre, thanks for your reply!
You are right! The IMU2 accel data is absent, I didn't notice that, thanks! It's very strange... I watched the previous flights, there are no problems with IMU2 accel. We have already had problems with this pixhawk, not…"