In order to facilitate managers to collect timely and accurate data on users'electricity consumption and im-prove work efficiency,this paper designs a wireless meter reading system based on embedded and NB-IoT IoT technolo-gy,which can collect and monitor users'electricity consumption in real time.The system uses a low-power STM32 series microcontroller as the main control chip,and uses the Modbus-RTU communication protocol with RS485 interface to collect electrical energy information.It uses RFID wireless radio frequency identification technology for Mifare card identification and reads user information.Based on BC35-G communication module combined with UART serial port and AT command to es-tablish the connection between the main control chip and Huawei cloud platform,the collected data is uploaded to Huawei cloud platform using MQTT communication protocol transmitted by 4G network,which improves the real-time and reliability of data transmission and provides a solution to realise timely and accurate collection of users'power consumption data.
维普
万方数据