[Bug]: unable to connect to EMMA power meter

[XalaTheShepard]

Describe the issue

Dear all,

Since today I have an EMMA meter installed with my solar panels, home battery and car charger.
This EMMA meter is connected with a UTP cable, so I thought I should use the network approach.
When trying to add the integration to HA, I complete the IP address, but get the error message "unable to connect".
Currently I am on HA Core 2025.1.3 .
Might the HA Core version be the issue (see other issue) or am I missing something?

Thanks for helping me out.

Kind regards,

Robin

Describe your Huawei Solar Setup

Inverter Type: SUN2000-6KTL-M1
Inverter Firmware version: V100R001C00SPC162
sDongle present: No
Power meter present: three phase
Optimizers Present: Yes /
Battery: LUNA2000-S1 xxkWh
Battery Firmware version: To be activated still
Huawei Solar integration version: 1.4.1

How do you connect to the inverter?

Via the SDongle, wired connection

Upload your Diagnostics File

Drag & Drop your Diagnostics File here.

Upload your relevant debug logs

No logs

Please confirm the following:

• I'm running the latest release of Home Assistant.
• I'm running the latest release of this integration.
• I did not find an existing issue describing this problem.
• I did upload the diagnostics-file that I could retrieve from the 'Devices & Services Page'
• I did upload the relevant debug logs (via 'Enable Debug Logging'-feature or by manually configuring HA logging)

[XalaTheShepard]

To add to the questions:

There might be an issue related (not completely sure)
No diagnostics from the devices available as it can not be installed
No logs available for the same reason

[trianarchy]

Hi Robin,

Check this, that's how it worked for me:
#884 (comment)

Best regards

Andy

[XalaTheShepard]

Dear Andy, maybe a stupid question, but how do I enter the EMMA setup? Many thanks for the information. Kind regards, Robin

[trianarchy]

Hi Robin,
connect to EMMA with the FusionSolar App: https://support.huawei.com/enterprise/en/doc/EDOC1100165054/92544271/device-commissioning-emma

[RedVision81]

Hey,
tried to setup the EMMA Connection today too, but get the same error "Failed to connect"
Also tried older Versions but still not able to connect.

Core 2025.1.4
Supervisor 2024.12.3
Operating System 14.2
EMMA Version: V100R024C10SPC100

Modbus in Emma is on, TLS disabled, and Client IP is HA IP

also removed it from HACS and re-installed again, no luck so far :-(

also often geht the error when trying to add the integration:

Fehler
Der Konfigurationsfluss konnte nicht geladen werden: {"message":"Invalid handler specified"}

Protokolldetails (FEHLER)
Logger: homeassistant.config_entries
Quelle: config_entries.py:3314
Erstmals aufgetreten: 13:49:42 (1 Vorkommnisse)
Zuletzt protokolliert: 13:49:42

Error occurred loading flow for integration huawei_solar: No module named 'pymodbus.pdu.register_message

Rolling back to Version 1.5.0b2:

i got this error in Logs while trying to connect:

Protokolldetails (FEHLER)
Logger: huawei_solar.huawei_solar
Quelle: /usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py:185
Erstmals aufgetreten: 13:58:55 (8 Vorkommnisse)
Zuletzt protokolliert: 13:58:59

Aborting client creation due to error
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 178, in create
client = AsyncHuaweiSolarModbusTcpClient(host, port, timeout)
File "/usr/local/lib/python3.13/site-packages/huawei_solar/modbus.py", line 65, in init
super().init(host, port=port, timeout=timeout, reconnect_delay=RECONNECT_DELAY)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/modbus.py", line 28, in init
super().init(*args, **kwargs, trace_connect=self._trace_connect) # forward all unused arguments
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: AsyncModbusTcpClient.init() got an unexpected keyword argument 'trace_connect'

Updated to Version 1.5.3 again:

Protokolldetails (FEHLER)
Logger: huawei_solar.huawei_solar
Quelle: /usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py:185
Erstmals aufgetreten: 14:04:38 (3 Vorkommnisse)
Zuletzt protokolliert: 14:04:43

Aborting client creation due to error
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 178, in create
client = AsyncHuaweiSolarModbusTcpClient(host, port, timeout)
File "/usr/local/lib/python3.13/site-packages/huawei_solar/modbus.py", line 65, in init
super().init(host, port=port, timeout=timeout, reconnect_delay=RECONNECT_DELAY)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/modbus.py", line 28, in init
super().init(*args, **kwargs, trace_connect=self._trace_connect) # forward all unused arguments
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: AsyncModbusTcpClient.init() got an unexpected keyword argument 'trace_connect'

[trianarchy]

For me it only works with Huawei Solar Version 1.5.0a1

[RedVision81]

With the new 1.5.4 I was able to connect... Yeah... 👍