| Summary: | In order to achieve dynamic and accurate measurement of multiple parameter information in farmland environment and improve the level of agricultural production, a weather monitoring station suitable for farmland environment is designed. Firstly, data acquisition hardware circuit based on Modbus protocol and data upload 4G gateway node circuit are designed. Secondly, the DMA controller is applied to the idle interrupt mode of the serial port to achieve efficient reception of Modbus data acquisition. Finally, the data is transmitted by the gateway node through the EDP protocol to the IoT cloud platform for analysis, evaluation and processing. The single site of the farmland meteorological monitoring station supports the real-time acquisition of 32-channel sensors, which solves the problem that the single node acquisition parameters are single and the acquisition cycle is long in the past deployment of farmland wireless sensor network nodes, and meets the needs of accurate agricultural farmland environment monitoring.
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