Device for detecting (4) the intention of locking or unlocking an opening of a motor vehicle by a user, this device (4) being integrated in a handle (1), comprising: • an inductive sensor which includes an LC circuit resonant (9) consisting of at least one coil (7) and a main capacitor (C1, C2); • a handle target (8); • a microcontroller (6) provided with means for measuring (13) the resonance frequency (FRM) of the resonant LC circuit (9); • a device for adjusting the value of the total capacity (Ctotal) of the resonant LC circuit (9), this adjustment device providing at least two different values of total capacity for the resonant LC circuit (9).
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