This paper presents the design and deployment of wireless sensor network for campus monitoring. With the help of Passive Infrared (PIR) sensor, temperature sensor, humidity sensor and thermisters, an effective utilization of energy resources has been implemented in rooms of Sharda University, Greater Noida, India. The security of campus against intruders moving in laboratories, class rooms, staffrooms or washrooms etc. after working hours and fire alarm are also provided by this system. The low power microcontroller is used for analysis of output of sensors and providing proper control using ZigBee protocol to achieve low power and low cost. Approximately 45% power has been saved due to implementation of this wireless sensor module in classrooms and faculty cabins. The cost is