A wireless position transducer for a valve in a process control system converts a motion or a position of an actuator of the valve into a wireless signal including a value indicative of the position of the actuator. The transducer causes the wireless signal to be transmitted over a wireless communication channel to a valve controller, such as by using a wireless HART protocol. The wireless communication channel is an exclusive connection between the transducer and the controller, and the transducer is powered by a local rechargeable energy storage device. The controller controls the valve based on the value included in the wireless signal. The transducer may also cause the wireless signal to be transmitted to a control host of the process control system.