Abstract: A method for wireless communication between a controller and a group of user devices, each user device having a respective identification number (RFID), comprising: assigning a sequence number (PID) to each user device; transmitting the PID from the controller to each user device; and, in response to a message broadcast from the controller to the group of user devices, receiving a response from each user device in sequence, wherein each response includes the respective PID of the user device, and wherein each user device determines when to transmit its response by comparing its PID with the PID of each transmitted response. The method supports group identification, middle stream devices, multifunction user devices (e.g., remote control, wireless mouse, motion detector), and remote programming of user devices and middle stream devices. Also, a matching method is provided for comparing a sample item to a reference item using the controller and user devices.