afedorov:
I am building a drone. I want the drone to don't move if joystick is released. At the start up I make multiple measures of the steady state and use it as zero value.What is the deadband programmed?
It's de-sensitisation. So you just have to write code that processes the values from the joystick. Make the joystick unresponsive if the joystick values lie in some suitable range around the 512 region..... such as... make the joystick not do anything (eg. output zero values) if the actual joystick values fall in the range from say 508 to 516, or whatever range you want.
Before you work on the drone, probably better off starting with using your joystick to control an RC car to begin with.