Zigbee greenhouse management system solution

chrispeng December 29, 2021 Food safety

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1. Project background

By arranging temperature, humidity, light, soil moisture, carbon dioxide and other sensors in the agricultural greenhouse, the environment in the shed is detected, so as to automatically control the temperature, humidity, and light in the shed. The sensor adopts wireless radio frequency technology, which can transmit data to the computer remotely. The computer analyzes and calculates the data transmitted by the wireless sensor, and in turn automatically controls the relevant actuators (such as opening the ceiling for lighting, opening the vent to release carbon dioxide or oxygen, Control the opening or closing of the watering valve, etc.) to provide a more suitable growth environment for the crops in the shed.

Through more detailed and dynamic monitoring methods, we can manage crops, better perceive the environment of crops, achieve a “smart” state, and improve resource utilization and productivity levels.

　2. System description

Hardware architecture:
This system uses ZIGBEE wireless radio frequency technology.
The wireless sensor tag is an active tag, using the microwave band 2.4GHZ. Can realize long-distance (0~1000 meters) transmission to the reader;
The reader is also connected to the computer, and there are many ways to connect the reader to the computer. There are: RS232/485 (485 can be equipped with MODBUS bus or CAN bus, etc.), TCP/IP, GPRS, EVDO, CDMA2000, etc.
The PC adjusts or converts the received information into a digital signal that can be recognized by the computer, stores and analyzes it.
The PC controls the PLC programmable controller at the same time, and transmits the instructions to the PLC, and the PLC controls the execution unit. Think of units such as solenoid valves, motors, etc.

Figure 1 System network topology diagram