Patent ID: 8661176

Claim:
A bidirectional wireless transmission system for serial format data signals between a “master” first electronic device and a “slave” second electronic device, the serial format data signals being exchanged at short range via a bidirectional electromagnetic coupling means outputting a pulse on each rising or falling front in said serial format data signals, wherein the “slave” second electronic device is an energy meter including a microcontroller having a serial input port, in that in order to transmit data signals from the “master” electronic device to the “slave” energy meter, the pulses output by the electromagnetic coupling means are positive pulses delivered to said serial input port, and in that the microcontroller is programmed to: generate an interrupt for each pulse received on said input port; synchronize itself on the first received pulse; and act at the serial data transmission speed to generate a succession of bits, a value of each generated bit being: equal to a value of a preceding bit if no interrupt has been received in the meanwhile; and equal to an inverse of the value of the preceding bit if an interrupt has been received in the meanwhile.