Flexible baud rate: The baud rate can be set by the user. The common protocol supports automatic data upload, and the upload rate can be set by the user as well. Dual protocol compatibility: Standard MODBUS protocol and a builtin common protocol are integrated. Users can choose the communication protocol that fits their system. Robust industrial hardware: Uses industrialgrade chips and a precision SHT20 temperature and humidity sensor for reliable performance. The RS485 hardware interface includes protection, and the protocol layer is compatible with the standard industrial ModbusRTU protocol. Integrated protocol options: This product combines MODBUS protocol and the common protocol in one device. Users can select the communication protocol; the common protocol includes an automatic upload function. RS485 communication: Industrialgrade RS485 interface with protection for stable, longdistance communication in harsh environments. Key attributes at a glance: Industrialgrade design; reliability SHT20 temperature and humidity sensor; RS485 communication; compatibility with ModbusRTU; two protocol options with userselectable settings. Use scenarios: Industrial automation: integrate with PLCs and SCADA systems over ModbusRTU to monitor environmental conditions and equipment status. Building management and HVAC: connect sensors via RS485 to central building management systems using the MODBUS or common protocol. Remote data logging: enable automatic data upload through the common protocol to a central server or data logger, with userdefined upload timing.