US Patent 9312949 Pairing techniques for a wireless card reader

Methods, systems, and apparatus, for pairing a wireless card reader and a computing device, including: receiving first user input setting the wireless card reader in a pairing mode; sending an indication from the wireless card reader to the computing device that a pairing mode of the wireless card reader is enabled; receiving an indication from the computing device that a pairing mode of the computing device is enabled; receiving, in the wireless card reader, a second user input of a sequence of actuations of a sensor on the wireless card reader; determining, on the wireless card reader, whether the sequence of actuations matches a stored sequence; and in response to determining that the sequence of actuations matches a stored sequence, pairing the wireless card reader with the computing device.