A grain storage monitoring system based on wireless sensor networks

According to the requirement of grain storage, based on the wireless sensor network, design grain storage monitoring system consists of two level network structures, tree-network structure and star-network structure. And design MAC protocol based on it, which realizes reliable communication and low power consumption, at the same time, decreasing complexity of communication protocol. Experiment results show that one-time-wake-up-rate of nodes is 95% and two batteries of AAA 1.5V can drive node 5 years continuously.