Abstract: The method of determining the position of the shaft of a direct current motor including an armature powered via brushes and a bar commutator and designed to drive a roller blind includes the following phases: detecting and counting the commutations that occur between the brushes and the commutator bars to determine the position of the motor shaft when the commutation count is valid, and measuring the back electromotive force of the motor to determine the position of the motor shaft when the commutation count is not valid.

Abstract: The invention relates to a method for interpretation of a radio-electrical command for equipment in which the command is interpreted as a function of the emission zone. This is achieved whereby the electromagnetic characteristics of the field generated by the radio-electrical command in the vicinity of a device for reception of radio-electrical commands are determined. The characteristics are compared to determine if the point of the radio-electrical command is located in a near-field or in a far-field zone. A command is then carried out as a function of the command received and as a function of the emission zone of the command. This permits the same command to have two meanings for the equipment.