A method of assigning a plurality of unique identifiers to a plurality of sensors of an array of sensors in signal communication with one another and with a control unit via a predetermined connection, the sensors being connected to each other according to a sequential order starting from the control unit; said method comprising the steps of: - temporarily setting a first identifier in each sensor of the array; - generating a trigger signal on the connection by the control unit; - cyclically repeating the steps of: • receiving said trigger signal by a receiving sensor of the array, said receiving sensor being the sensor closest to the control unit according to the sequential order among the sensors set with the first identifier; • temporarily setting a second identifier in said receiving sensor; • sending on the connection by the control unit a setting signal containing a unique identifier directed to a sensor of the array set with the second identifier; • receiving by the sensor of the array set with the second identifier the setting signal containing the unique identifier and changing the corresponding identifier from the second identifier to the unique identifier; • propagating the trigger signal on the connection by the sensor that has received the setting signal containing the unique identifier. characterized in that said predetermined connection comprises a series communication line and a common communication line, each sensor being configured to receive and block signals carried on the series communication line from the control unit or from a respective sensor consecutive according to the sequential order, the common communication line being configured to simultaneously carry signals between the control unit and all the sensors of the array, the trigger signal being transmitted on said series communication line, the setting signal being transmitted on said common communication line. - temporarily setting a first identifier in each sensor of the array; - generating a trigger signal on the connection by the control unit; - cyclically repeating the steps of: • receiving said trigger signal by a receiving sensor of the array, said receiving sensor being the sensor closest to the control unit according to the sequential order among the sensors set with the first identifier; • temporarily setting a second identifier in said receiving sensor; • sending on the connection by the control unit a setting signal containing a unique identifier directed to a sensor of the array set with the second identifier; • receiving by the sensor of the array set with the second identifier the setting signal containing the unique identifier and changing the corresponding identifier from the second identifier to the unique identifier; • propagating the trigger signal on the connection by the sensor that has received the setting signal containing the unique identifier. characterized in that said predetermined connection comprises a series communication line and a common communication line, each sensor being configured to receive and block signals carried on the series communication line from the control unit or from a respective sensor consecutive according to the sequential order, the common communication line being configured to simultaneously carry signals between the control unit and all the sensors of the array, the trigger signal being transmitted on said series communication line, the setting signal being transmitted on said common communication line. • receiving said trigger signal by a receiving sensor of the array, said receiving sensor being the sensor closest to the control unit according to the sequential order among the sensors set with the first identifier; • temporarily setting a second identifier in said receiving sensor; • sending on the connection by the control unit a setting signal containing a unique identifier directed to a sensor of the array set with the second identifier; • receiving by the sensor of the array set with the second identifier the setting signal containing the unique identifier and changing the corresponding identifier from the second identifier to the unique identifier; • propagating the trigger signal on the connection by the sensor that has received the setting signal containing the unique identifier.