Abstract: The invention relates to an electronic device (1) configured for opening/closing a door (P) or similar, from a light signal defining an opening and/or closing code emitted by a movable transmitter having means for emitting said light signal, said electronic device having an electric lock comprising: a lock cylinder (2) with a stator (20) and a rotor (21), as well as an electric actuator (3) configure to modify the state of the electric lock, means for receiving signals configured to detect light pulses comprising a receiving diode (4), a control unit (5) connected to the receiving diode (4) and connected to the electric actuator (3), configured to decode the light pulses detected by said receiving means and to determine a control of the electric actuator (3). According to the invention, the diode (4) is advantageously protected and all of the means (3, 4, 5) are self-supporting with the lock cylinder (2) in order to facilitate the installation of it as a conventional lock cylinder.