Systems, methods, and devices for assigning addresses to a plurality of functional modules carried by a movable object are provided. In one aspect, a method can comprise: (a) transmitting an activation signal from a control module to a functional module of the plurality of functional modules via a first communication interface, thereby activating the functional module for addressing, wherein the plurality of functional modules are each configured to control a component of the movable object; (b) transmitting an addressing signal comprising an address from the control module to each functional module of the plurality of functional modules via a second communication interface different from the first communication interface, thereby causing the address to be assigned to the activated functional module of step (a); and (c) repeating steps (a) and (b) for each functional module, thereby assigning an address to each functional module.