Section 25

RS485 Modbus RTU / DS18B20 Bus Sensor Applications

⏱️ Estimated Duration: 20 mins

Master the configuration of Modbus RTU protocol (as master) and data read/write operations.

📚 Learning Points

RS485 Modbus RTU Basics: What RS485 and Modbus protocols are, master-slave working mode
As RS485 Master: Performance and configuration interface of IOTAutoMate as a master
Modbus Data Reading: Configure slave address, function code (e.g., read holding register 03H), start address, and number of registers
Modbus Data Writing: Configure function code (e.g., write single register 06H) to achieve control of devices such as frequency converters
Bus Sensor Application: Wiring and data reading of DS18B20 single-bus temperature sensors (if 485 function is not selected)
Bus Data as a Condition: Utilizing temperature, humidity, and ammeter data read by Modbus as conditions for automation control

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Content in Progress

Detailed content for this section is currently being written. Please stay tuned. You can browse other completed sections or check out the MQTT Protocol Documentation .