Method for communicating information by infrared rays between a transmitter and a receiver in a home-automation network

A method for communicating information by infrared radiation between a control command transmitter for a motorized product for closure, privacy or solar protection in a building and a control command receiver, the method comprising the transmission of a series of communication frames, wherein each frame in the series includes:

• a preamble signal comprising one or more pulses of a first type, the pulses of the first type having a first duration;
• and
• a data signal, the data being translated into the form of pulses of a second type, the pulses of the second type having a second duration which is different than the first duration;
• wherein the preamble signal and the data signal are modulated at the same frequency,
• wherein the control command receiver includes a first circuit for reception, processing the preamble signal, and waking up, upon reception of a preamble signal, a second circuit for receiving and processing the data signal,
• wherein the data signal is separated from the preamble signal by a signal-free period which has a duration that is greater than twice the maximum duration separating two successive pulses of the second type and greater than twice the duration of processing of the preamble signal up to the waking of the second circuit, and
• wherein each communication frame sent by the transmitter is adapted to control a first type of receiver and a second type of receiver, the first type of receiver configured to receive signals at a first frequency, the second type of receiver configured to receive signals at a second frequency.