Greenhouse Intelligent Monitoring System based on LoRa

Aiming at the problems of high power consumption, short transmission distance and difficult networking of existing greenhouse monitoring systems, a greenhouse monitoring system based on LoRa was designed. The system uses STM32 as the central processor to transfer the collected data from LoRa terminal to the LoRa concentrator. The concentrator uploads the monitoring data to the monitoring system through 4G network. The terminal is equipped with photovoltaic technology generation circuit to ensure the stable operation of the terminal under unattended conditions; The terminal supports the 3.3V sensor of IIC and RS485 interface, and the collected data will be uploaded to the concentrator after filtering by anti-pulse interference average filter algorithm. To some extent, the system solves the problems of low power consumption, difficult installation and limited networking of agricultural sensors. After testing, the packet loss rate of LoRa communication within 1000 meters is 0, and the effective data upload rate of sensor data upload monitoring platform is 98.28%. The collected data is stable and reliable, which can be applied to the data monitoring of greenhouse.