do you have the safety switch connected or enabled?
where is it. sorry but i am the new one in this cubepilot. i do not know what is the safety switch
PixHawk4
does not have it.
And there is a plane - and not copter
the cube does have it, its part of the GPS module normally
on the GPS it is connected HolyBro and no any safety switch connected
When you succeeded, was the SG90 in a state of being externally supplied with 5V voltage?
5V not enough, Used external battery with 7,4V


