The rainfall monitoring unit launched by Weichuan Technology is mainly used to measure rainfall data, converting rainfall into digital information output in the form of switch quantities. The selected rainfall sensor has the characteristics of reliable and stable data collection. The device adopts LoRa modulation and demodulation technology, which has the characteristics of long-distance low power consumption, supports LoRaWAN standard protocol, and can quickly connect with third-party platforms. Widely used in meteorological stations, hydrological stations, agriculture and forestry, national defense, field monitoring stations and other scenarios.