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Nickolay replied to climr's discussion Possible to disable internal compass?
"Unfortunately no sense at all :-(

Copter v.3.3.3
MP 1.3.37.3

Any other ideas?"
Apr 11, 2016
Nickolay replied to Randy's discussion Optical Flow discussion thread
"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).
Then…"
Feb 4, 2016
Nickolay replied to Randy's discussion Optical Flow discussion thread
"Thanks a lot!
You say that you are using AC3.3.3 RC2. Have you compiled it from the sources or just downloaded through the Mission Planner (as beta version firmware)?"
Feb 3, 2016
Nickolay replied to Dmitry Prokhorov's discussion Solution proposal for PixHawk IMU2-related BAD ACCEL HEALTH
"Yes, I confirm! Easiest and reliable solution! I have tested it (however, with R0603 470 Ohm and R0805 560 Ohm resistors on different pixhawks) and it works perfectly! Thanks again!"
Feb 3, 2016
Nickolay replied to Dmitry Prokhorov's discussion Solution proposal for PixHawk IMU2-related BAD ACCEL HEALTH
"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…"
Feb 3, 2016
Nickolay replied to Randy's discussion Optical Flow discussion thread
"Hi!
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?"
Jan 31, 2016
Nickolay replied to Dmitry Prokhorov's discussion Solution proposal for PixHawk IMU2-related BAD ACCEL HEALTH
"Hi, everyone!
Now the reason of our october crash is clear:
http://diydrones.com/forum/topics/quadrocopter-crashed-in-auto-mode...
Right before the unsuccessfull flight the copter was powered off (after series of the successfull flights) for the…"
Jan 31, 2016
Nickolay replied to Nickolay's discussion Quadrocopter crashed in auto mode (Copter-3.4-dev)
"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…"
Jan 31, 2016
Nickolay replied to Randy's discussion Optical Flow discussion thread
"Hi!
I have the following simple question: is it possibile to fly indoors with px4flow (without gps 3d fix)?"
Dec 12, 2015
Nickolay replied to Dmitry Prokhorov's discussion Solution proposal for PixHawk IMU2-related BAD ACCEL HEALTH
"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…"
Dec 12, 2015
Nickolay replied to Nickolay's discussion Quadrocopter crashed in auto mode (Copter-3.4-dev)
"Finally we have not been able to establish the reason of the crash. So we decided to downgrade to the stable copter-3.3.1 firmware."
Nov 11, 2015
Nickolay replied to Nickolay's discussion Quadrocopter crashed in auto mode (Copter-3.4-dev)
"Yes, I don't see the signs of bad magnetometer too. It seems like some position calculation error.
Have you seen the video?
What do you think about arm-zeroing and jumps of ATT.YAW?"
Nov 1, 2015
Nickolay replied to Nickolay's discussion Quadrocopter crashed in auto mode (Copter-3.4-dev)
"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…"
Nov 1, 2015
Nickolay posted a discussion
Hello! We need help!http://diydrones.com/video/2015-10-22-16-17-25-crashWe noticed the strange problem: right after arming yaw suddenly became zero (see the video). Then we switched to auto mode and crashed. Before that we made several successfull…
Oct 30, 2015