between a no load value of this current stored when no transponder is in the field of the terminal and the first value is calculated and pieces of information intended for the user are controlled according to said second value application_number US 201214123739 A description the same elements have been designated with the same reference numerals in the different drawings for clarity only those steps and elements which are useful to the understanding of the described embodiments have been shown and will be detailed in particular the origin and the destination of the data transmitted in communications between a transponder and a terminal have not been detailed the described embodiments being compatible with any usual communication fig1 very schematically shows an example of a communication and remote supply system comprising a terminal 1 or read and or write terminal and a transponder 2 generally terminal 1 comprises a series oscillating circuit formed of an inductance l 1 in series with a capacitor c 1 and a resistor r 1 this series oscillating circuit is controlled by a device 11 comprising among others and without this being a limitation an amplifier or antenna coupler and a transmission control and exploitation circuit especially comprising a modulator demodulator and a command and data processing circuit generally a microprocessor device 11 generally communicates with different input output circuits keyboard display element of exchange with.