Abstract:

To resolve the problem of fixed topology and node scalability in greenhouse monitoring system,the design and implementation methods of greenhouse environmental monitoring system based on ZigBee wireless sensor networks were proposed and constructed based on the ZigBee protocol. Hardware design and software solution are given. The ZigBee coordinator network processing is discussed in detail. PIC18F4620 microcontroller is used to control CC2420 radio transceiver and drives temperature and humidity sensor (SHT11) through the I²C bus. The temperature and humidity are sent to the monitoring platform by the ZigBee network. Test results show that the system has the advantages of fast networking，flexible nodes and low power consamptian. It realizes greenhouse temperature and humidity monitoring effectively in the wireless environment.

Key words: greenhouse monitoring system,  , wireless sensor networks, ZigBee protocol, low power