The invention is intended to be used in the technological field of communication and the update of data between electronic equipment (1, 2) capable of inter-communicating using wireless links. The invention relates more particularly to a process and a system to automatically configure and update the data saved in a radio frequency identifier (3). The process and the system enable the update of the data recorded in a radio frequency identifier of a first equipment item (1) equipped with a display screen (5) by displaying on screen a visual code (7) bearing update data of the radio frequency identifier. The visual code is then read using a second equipment item (2) provided with a visual code read device (4) having radio frequency identifier read-write interface. Then, the decoding of the visual code and the conversion and transmission of the update data to the radio frequency identifier by means of the read-write interface are performed.