Instructional video belowHow to read & write Modbus Data via MQTTRobustel explains which function codes can be supported with the Robustel Modbus APP, such as:
- 01 Coil status (0x) – Read & Write
- 02 Input status (1x) – Read only
- 03 Holding status (3x) – Reading & Writing
- 04 Input Registers (4x) – Read only