Huawei Dtsu666

[Mariela Laflam]

asthere is no answer yet I can at least partially answer that for you.

I am currently reading a DTSU666-H 250A with current transformers (I think there is no difference communication wise to the model without tranformers) via a modbus RTU to TCP converter.

I may add though, that I switched from home assistant to another home automation some time ago.

But as I am using a generic modbus tcp slave where I defined the registers myself I am confident HomeAssistant will work just as well for you.

Having two power meters in the bus will be no problem, as you can simply daisy-chain the meters and connect the bus to the modbus RTU/TCP converter.

Please keep in mind that you will need to setup the members on the bus correctly. For at least one of the meters you have to adjust the modbus address. Thats a quite simple process and well documented in the Quick guide you can download from the huawei website (DTSU666-H 100 A and 250 A Smart Power Sensor User Manual - Huawei). Please be also aware that you will need a seperate Modbus TCP slave for each member on the bus and set the same member-ID as you set on the meters.

Would anyone have had any luck trying to use this with a Huawei DTSU-666H that is connected to a Huawei Smart Logger 3000A (COM3 Address 11) via RS485, so the SmartLogger that makes it available via Modbus TCP.

Tried logical just in case the integration (or pymodbus) is attempting defaulting to only checking COM1 and hence would be trying to connect to COM 1 Address 11 (on the Smart Logger my inverters are daisy chained off COM 1), whilst the DTSU-666H is attached via COM3 Address 11.

hi, i have tinkered already for few hours, and would like to ask for the help.

i have setup all setting in waveshare with DTSU-666 and then trying to connect it in home assistant and it shows error Unknown. I see in vircom, that connection for few seconds has been established but then error. What can be a problem?

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