Barometer error when takeoff

PX4 Autopilot Multicopter 🛸
1

Hello all
I am using a 250 drone with 1806 motor, 3s battery.
I found a problem of taking off.
The attached is the log of a flight.

bmp280.png1556×1052 79.7 KB

pos_sp are position_setpoints(in meter), tof-avg(in mm) is a tof sensor to detect height, which is pretty precise.
So every time I send the takeoff command, the barometer would have a deep drop and then go back to normal. The same pattern happens when landing.
I wonder if it is related to battery management system, due to the huge current while taking off.
Or any other possible reasons?
Thank you.

2

can u attach bit more info like which firmware version you are flying and which hardware you are using?

3

I guess there actually is a higher pressure due to the thrust/ground effect. If you want to exclude battery stuff, try without props.

4

I am using snapdragon flight and 1.6.0 Release, with my own motor and other hardware.

5

Yes, I did it again without any prop.
The pressure remains correct during takeoff.
Actually, it keeps stable while hovering.