Unable to read Modbus Values from Huawei Wallbox

1

Installation OpenHab 5.1 on a Raspberry Pi 4

Im using a HUAWEI SUN2000-8KTL-M1 and added a Huawei Wallbox to my system.
It is displayed in the Fusion solar App and it`s working.
I added my Inverter to Openhab reading the values with modbus a year ago.
It works fine.
So I tried to add my wallbox also to Openhab
I got the registers from here https://github.com/evcc-io/evcc/discussions/10262
The value I need is Total Output Power (register 4108)
So I tried to add a Modbus Poller to my system and a data Modbus Reader
But after a view seconds I get an Error

21:02:26.583 [ERROR] [ort.modbus.internal.ModbusManagerImpl] - Last try 3 failed when executing request (ModbusReadRequestBlueprint [slaveId=1, functionCode=READ_MULTIPLE_REGISTERS, start=4108, length=2, maxTries=3]). Aborting. Error was: net.wimpi.modbus.ModbusSlaveException Error Code = 2 [operation ID 8bba1d76-f4bd-4522-a4eb-977b85f66c47]

I don´t know hot to fix ist.

2

Modbus Error 2 means “wrong address or register space”. While register 4108 seems correct, are you connecting to the Inverter or the Wallbox? I’d think you need a new Modbus thing (bridge) to connect to the Wallbox for the Poller and Data things.