Thank you, Leila
Yesterday set_trim(-8, 4), I got stability. Today drift backward,
set_trim(-8, 25), I got stability.
Evert time I fly my drone, I have to set trim. Troublesome!

I can not stabilize my CoDrone Mini hovering.
I have tried to press and hold the RESET button, confirmed the LED on the drone flashed.
On the python program I have changed the variables ' drone.set_trim() ' many times.
Do you have any ideas?