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The system design architecture of wireless sensor terminal is introduced in detail. The wireless sensor terminal is composed of M263 Series NuMicro MCU, bme680 sensor of Bosch and Lora wireless communication module. This paper comprehensively considers the functions of each module, communication reliability, power consumption and power saving, and expounds the design points and principles in detail. As the main control software, MCU is responsible for realizing the functions of driving and business processing, As an environmental sensor, bme680 can collect temperature, humidity, air pressure and other information. The communication protocol of Lora wireless communication module adopts the micro power wireless network communication protocol of the Internet of things for power transmission and transformation equipment of the State Grid. Bme680 is responsible for collecting environment information to MCU. MCU and wireless communication module interact with each other through serial port. The wireless communication module transmits data to and receives information from the sink node through wireless mode, so as to realize intelligent management of power equipment operation. Based on the realization of service functions, this paper focuses on the design of MCU software and wireless communication module, as well as the power consumption and power saving of sensor terminals.
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