Design of street light pole controller based on WSN

In order to monitoring and control street lighting, the lighting pole controller was designed and implemented based on wireless sensor network. The controllers were installed at each lighting pole. The hardware of controller integrates a AVR microcontroller, a radio modem, double lamp control units and current detecting units. The lamp control units control primary and secondary lamp on or off according to receiving command from RTU. The current detecting units measure the power line current to determine the lamp status which reporting to the center. A routing strategy based on the sequence controller address was proposed. According to the power substation powering scope, the lighting controller was divided many clusters. The controller forwards the packet to RTU according to the packet head information, sending controller address and its own address. All forwarding controllers waits a random interval and listen other controller transmission to avoid that multiple copies of a same packet is sent. The proposed routing for street lighting system is simple and not need to maintain complex path discovery algorithms.