The present invention provides a method of discovering a remotely-located control device in a wireless control system having a plurality of control devices. Each of the control devices of the control system has a unique serial number. A query message is first transmitted to the plurality of control devices. An acknowledgement message is transmitted from the first control device in response to the query message. The acknowledgement message is transmitted in a random transmission slot and contains a random data byte. The first control device is identified by the random transmission slot and the random data byte. The serial number of the first control device is requested, and transmitted from the first control device. At this time, the control device is operable to be assigned a unique device address.