An elevator system includes a wireless batteryless hall call switch module that transmits a unique wireless code when a person presses a hall call button requesting elevator service. In the preferred embodiment, the cap and capacitor are mounted to one another in a manner that prevents separation without destruction of the capacitor. The first frequency synthesizer is coupled to a transmit chain and to a receive chain of the AFE. When the user is more than a pre-determined distance from the car, as determined by a GPS location measurement that is compared with the stored GPS location, the security system is activated and the car is locked.