1. Industrial grade product, high SHT20 temperature and humidity sensor, RS485 communication; 2. Standard MODBUS protocol and common protocol are integrated, users can communication protocol by themselves; 3. The baud rate can be set by yourself; The common protocol has an automatic upload function, and the upload rate can be set by yourself 4. The of industrial-grade and high- imported SHT20 temperature and humidity sensors reliability, high and interchangeability of the product. Using RS485 hardware interface (with thunder protection design),the protocol layer is with the standard industrial Modbus-Rtu protocol. This product integrates MODBUS protocol and common protocol. Users can communication protocol by themselves. Common protocol has automatic upload function. 5. Data download link https://.baidu./s/1rejNLesXAIByQpqCoTdoTA, extraction code: yuy5 Working voltage: DC4-30V (the highest should not exceed 33V) Maximum : 0.2W Working temperature: temperature -20+60, humidity 0%RH-100%RH Control accuracy: temperature 0.3(25), humidity 3%RH(25) Output interface: RS485 communication (standard MODBUS protocol and custom common protocol), see protocol description for details Device address: 1-247 can be set, the default is 1 Baud rate: default 9600 (users can set by themselves), 8-bit data, 1-bit stop, no parity size: 60x30x18mm Material:ABS colour:Black Package Contents: 1 x Temperature Humidity Sensor Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.