1. Industrial 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 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 use of industrial- and high-precision SHT20 temperature and humidity sensors reliability, high precision and interchangeability of the product. Using RS485 hardware interface (with thunder protection design),the protocol layer is compatible 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: or or .baidu. or s or 1rejNLesXAIByQpqCoTdoTA, extraction code: yuy5 Working voltage: DC4-30V (the highest should not 33V) Maximum power: 0.2W Working temperature: temperature -20and60, humidity 0 percent RH-100 percent RH Control accuracy: temperature 0.3(25), humidity 3 percent RH(25) Output interface: RS485 communication (standard MODBUS protocol and custom common protocol), see protocol for details Device address: 1-247 can be set, the default is 1 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 are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.