Device pairing is the mechanism through which an ANT slave device gains knowledge of the complete channel ID of a particular transmitter it intends to communicate with. ANT channel search allows an ANT slave device to search for, and acquire an appropriate transmitting master device according to set search criteria.
If the slave knows the entire channel ID of it master, it means the master and slave are pre-paired, the slave will search and communicate with the master device that shares its exact channel ID.
In many practical applications, the slave may not initially have knowledge of the master’s exact channel ID, or it might be desirable to allow connections to more than one device. For example, the slave may know what device type it wishes to connect to, but not the actual device number or transmission type. In this case, the slave can pair to any ANT master device matching the desired device type by placing a wild card (0) in the device number and transmission type fields. Once communication is established, the slave can obtain the full channel ID of the master and save the information for future communications.