A system for remotely measuring the characteristics of water passing through a plumbing control device (PCD) includes a sensor configured to measure characteristics of the water to obtain measured data. The sensor is also linked to a microcontroller of the PCD. An antenna board is linked, and configured to transmit power, to both the microcontroller and the sensor. The antenna board is configured to receive power transmitted from a mobile device and, in turn, transmit power to the microcontroller and the sensor. When power is not being transmitted from the antenna board, the microcontroller and the sensor may be powered off.