The home switch has three positions, however only the top toggle position will turn RTL on.
(Bottom/Middle Toggle Position)
This is the normal switch position and does not initiate an RTL command.
(Top Toggle Position)
This manually initiates the RTL function. In RTL, PX4 will command ALTA Pro to climb to the set minimum altitude and then guide the unit’s position to the home point.
Once RTL has been initialized it will continue to return to home unless the Home Switch is returned to RTL Off.