As per the ZLL specification, the dimmable light is configured as a ZigBee Router.
The Dimmable light is brought into a ZigBee network through a commissioning process
known as Touchlinking, which is initiated from a remote control. Hence it is expected
that, on startup, the light does not explicitly scan for ZigBee networks in the
vicinity. This is an application controlled behavior and is disabled by setting the
macro APP_SCAN_ON_STARTUP to zero as mentioned in section Configuration of parameters.
The AVR477 Remote Control is used to touchlink the dimmable light. Touchlinking is the process of sending network information to a light to make it join a ZigBee network. The functionality is described in section Remote Control – The AVR477 Touch Remote Control Board.