Authentication and information system for reusable surgical instruments

A method of communicating data over a bus, the method comprising: authenticating a surgical component using a microchip (1030) communicatively coupled via a single wire bus (1010) to a microprocessor (1020) capable of demultiplexing lines transmission and reception using a ground wire (1012) from the microchip (1030); and controlling a receive mode and a transmission mode through the single-wire bus, wherein to transmit through the single-wire bus (1010), the ground wire (1012) is disconnected and the microprocessor (1020 ) selects the transmission mode, and to receive via the single wire bus (1010), the ground wire (1012) is turned on and the microprocessor (1020) selects the receive mode.