DTS353 with Modbus support

Configuration
1

I use a DTS353 kWh device with Modbus support. I had a lot of problems getting the device to work with home assistant, so I wanted to share my settings.

I use a https://www.victronenergy.com/accessories/rs485-to-usb-interface without termination.
Connection:
orange -> A -> 21
yellow -> B -> 20

Configuration.yaml:
modbus:
  name: hub1
  type: serial
  method: rtu
  port: /dev/ttyUSB1
  baudrate: 9600
  stopbits: 1
  bytesize: 8
  parity: E
  timeout: 1

sensor:
  - platform: modbus
    scan_interval: 60        # not critical, is enough for me
    registers:
    - name: energy_auto
      hub: hub1
      unit_of_measurement: kWh
      slave: 1
      count: 2
      register: 256
      precision: 1
      data_type: float
    - name: power_auto
      hub: hub1
      unit_of_measurement: kW
      slave: 1
      count: 2
      register: 28
      precision: 1
      data_type: float
1 Like
2

I would love to do the same! Could you maybe take a picture of the wiring?

3

Unfortunately I don’t have the setup running anymore. i moved to an Easee EV charger and I don’t use the modbus anymore. Good luck.