Energy Monitoring with B+G E-Tech WS100-1943 Energy Meter via ModBus RTU via Waveshare RS485 TO WIFI/ETH

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Hi everyone,

just wanted to share a short configuration to get my energy monitor of my car into HASS, as I struggled a bit with the combination (Had to split the post because of some restrictions, all media in the comments below):

Energy Meter: B+G E-Tech WS100-1943 Energy Meter

All Parameters standard
baudrate: 9600
bytesize: 8
stopbits: 1
parity: none

can all be found here: [LINK1] https://stromzähler.eu/media/ee/97/41/1704818760/WS100-19xx_1123_DE.pdf

To hook this up into my LAN I configured the RS485 TO WIFI/ETH as follows:

Converter: Waveshare RS485 TO WIFI/ETH

Documentation can be found here: [LINK2] https://files.waveshare.com/upload/6/61/RS485-TO-WIFI-ETH-User-Manual-EN.pdf

Working Mode to Transparent [IMAGE1]
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Uart Settings set to the default from the energy meter: [IMAGE2]

Ethernet settings had to be changed to hook it up to my switch [IMAGE3]

Network A Settings remained mainly unchanged [IMAGE4]

Home Assistant Configuration:

configuration.yaml

modbus: !include modbus.yaml

modbus.yaml

- name: modbus-garage
  type: rtuovertcp
  host: [IP address of the RS485 TO WIFI/ETH]
  port: 8899
  sensors:
    - name: "BGE-Active Power CUPRA"
      device_address: 1
      address: 260
      unit_of_measurement: W
      data_type: int32
      input_type: input
      unique_id: "BGE-260"
      state_class: measurement
    - name: "BGE-Total Fwd CUPRA"
      device_address: 1
      address: 270
      unit_of_measurement: kWh
      data_type: int32
      input_type: input
      unique_id: "BGE-270"
      state_class: total
      precision: 2
      scale: 0.01

Big shoutout to the post of m9aertner here [LINK3]

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[IMAGE2]
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[LINK3]

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[IMAGE3]
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[IMAGE4]
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Thanks for the shoutout. I now used your post here to read out my GoodWe GW10KN-ET / Pylontech H3 “Battery State of Charge” (SOC) via Waveshare / Modbus Register 37007.

For some reason, this measurement does not show up with all my other GoodWe readings (using the GitHub - mletenay/home-assistant-goodwe-inverter: Experimental version of Home Assistant integration for Goodwe solar inverters integration; probably because the battery power cables are currently disconnected, only the CAN connection is in place?)

In any case, here’s my modbus config snippet:

- name: waveshare1
  type: tcp
  host: 192.168.1.208
  port: 502
  sensors:
    - name: "Battery SOC"
      device_address: 247
      address: 37007
      unit_of_measurement: '%'
      data_type: int16
      input_type: holding
      unique_id: "WAV1-37007"
      state_class: measurement
      precision: 0