Design of wireless sensor network node for carbon monoxide monitoring

Aim at protecting environment, a design proposal of Wireless Sensor Network (WSN) node for remote monitoring Carbon Monoxide is presented. The monitoring node uses a low-power SOC microprocessor C8051F930 who acts as a controller, utilizes Carbon Monoxide metal oxide (MOX) semiconductor sensor whose detective principle is that MOX semiconductor has redox reactions with CO and its resistance varies with gas concentration when it is heated, perceiving local CO concentration, conditioning the collected CO signals from the sensor, converting and processing datas, etc. The datas can be transmitted to Sink by high-performance wireless radio frequency chip Si4432 which supports for communication protocol IEEE 802.15.4, and Sink uses GPRS to send them remotely to the mobile network, realizing remote monitoring CO.