Using the rs485 bus

[paulwilke]

Hey and thanks for this great starting point. Could you please point me to the right config I have to do so I can access the RS485?

I figured something along the lines should work:

uart:
  id: uart_bus
  tx_pin: GPIO17  
  rx_pin: GPIO18  
  baud_rate: 115200

modbus:
  id: modbus1
  uart_id: uart_bus

modbus_controller:
- id: modbus_device
  address: 0x1   ## address of the Modbus slave device on the bus
  modbus_id: modbus1
  setup_priority: -10

sensor:
  - platform: modbus_controller
    modbus_controller_id: modbus_device
    id: temp_sensor_1
    name: "Temperature Sensor 1"
    unit_of_measurement: "°C"
    address: 0x0001  
    register_type: read  
    value_type: U_WORD  

  - platform: modbus_controller
    modbus_controller_id: modbus_device
    id: temp_sensor_2
    name: "Temperature Sensor 2"
    unit_of_measurement: "°C"
    address: 0x0002  
    register_type: read  
    value_type: U_WORD ```

[Jacksonjl]

Did you get this working for RS485?

[paulwilke]

yes I got it working. ` uart: tx_pin: GPIO17 rx_pin: GPIO18 baud_rate: 9600 id: uart_bus

modbus: id: modbus1 uart_id: uart_bus

modbus_controller:

• id: modbus_device address: 0x01 # Set to the Modbus address you confirmed works modbus_id: modbus1 setup_priority: -10 update_interval: 15s # Adjust the polling interval as needed

• platform: modbus_controller modbus_controller_id: modbus_device id: fridge_exterior_temp name: "Temperature around Fridge" unit_of_measurement: "°C" device_class: temperature address: 0x0002 # Register address for CH3 register_type: holding # Ensure the correct register type value_type: U_WORD filters:

  • lambda: return x / 10.0; `