RFCOM Humidity & Temperature sensor board is a low-cost, easy-to-use, highly accurate, pre-programmed sensor device. This sensor board is ideal for environmental sensing and data logging for building automation or air-conditioning control system. When customer plug in on-board PMOD interface, by pre-programmed on-board Renesas RL78/G12, as default you’ll have every 2-seconds relative humidity readings and very accurate temperature readings. There are only four pins One for Vcc, one for GND, and two data lines for UART communication. This humidity & temperature is directly plug & play with RFCOM PLC Baseboard Board.