[Bug]: When trying to connect to EMMA with SUN2000-17K-MB0 I get the following errors

[jgate]

Describe the issue

I tryied with Slave 0, 1 and AUTO

First error:
Logger: pymodbus.logging
Source: custom_components/huawei_solar/config_flow.py:204
integration: Huawei Solar (documentation, issues)
First occurred: 07:06:40 (4 occurrences)
Last logged: 10:50:28

Failed to connect [Errno 111] Connect call failed ('192.168.1.101', 502)
Failed to connect [Errno 111] Connect call failed ('192.168.1.101', 6607)

Second error:
Logger: huawei_solar.huawei_solar
Source: /usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py:146
First occurred: 07:05:35 (10 occurrences)
Last logged: 10:50:33

Timeout while waiting for connection. Reconnecting
Traceback (most recent call last):
File "/usr/local/lib/python3.13/asyncio/tasks.py", line 507, in wait_for
return await fut
^^^^^^^^^
File "/usr/local/lib/python3.13/asyncio/locks.py", line 213, in wait
await fut
asyncio.exceptions.CancelledError

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 141, in _communication_lock
await asyncio.wait_for(
...<2 lines>...
)
File "/usr/local/lib/python3.13/asyncio/tasks.py", line 506, in wait_for
async with timeouts.timeout(timeout):
~~~~~~~~~~~~~~~~^^^^^^^^^
File "/usr/local/lib/python3.13/asyncio/timeouts.py", line 116, in aexit
raise TimeoutError from exc_val
TimeoutError

Third error:
Logger: custom_components.huawei_solar.config_flow
Source: custom_components/huawei_solar/config_flow.py:536
integration: Huawei Solar (documentation, issues)
First occurred: 07:06:46 (4 occurrences)
Last logged: 10:50:33

Unexpected exception while connecting via ModbusTCP
Traceback (most recent call last):
File "/usr/local/lib/python3.13/asyncio/tasks.py", line 507, in wait_for
return await fut
^^^^^^^^^
File "/usr/local/lib/python3.13/asyncio/locks.py", line 213, in wait
await fut
asyncio.exceptions.CancelledError

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/config/custom_components/huawei_solar/config_flow.py", line 536, in async_step_setup_network
info = await validate_network_setup(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<4 lines>...
)
^
File "/config/custom_components/huawei_solar/config_flow.py", line 204, in validate_network_setup
bridge = await create_tcp_bridge(
^^^^^^^^^^^^^^^^^^^^^^^^
...<3 lines>...
)
^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/bridge.py", line 659, in create_tcp_bridge
return await _create(await AsyncHuaweiSolar.create(host, port, slave_id), slave_id)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/bridge.py", line 685, in _create
product_info = await HuaweiSolarProductInfo.retrieve_from_device(client, slave_id)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/bridge.py", line 67, in retrieve_from_device
) = await client.get_multiple(
^^^^^^^^^^^^^^^^^^^^^^^^^^
...<8 lines>...
)
^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 292, in get_multiple
response = await self._read_registers(
^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<3 lines>...
)
^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 422, in _read_registers
async with self._communication_lock():
~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.13/contextlib.py", line 214, in aenter
return await anext(self.gen)
^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 141, in _communication_lock
await asyncio.wait_for(
...<2 lines>...
)
File "/usr/local/lib/python3.13/asyncio/tasks.py", line 506, in wait_for
async with timeouts.timeout(timeout):
~~~~~~~~~~~~~~~~^^^^^^^^^
File "/usr/local/lib/python3.13/asyncio/timeouts.py", line 116, in aexit
raise TimeoutError from exc_val
TimeoutError

Last error:
Logger: pymodbus.logging
Source: runner.py:154
First occurred: 07:05:35 (10 occurrences)
Last logged: 10:50:33

Failed to connect [Errno 111] Connect call failed ('192.168.1.101', 502)
Failed to connect [Errno 111] Connect call failed ('192.168.1.101', 6607)

Describe your Huawei Solar Setup

Inverter Type: SUN2000-17K-MB0
Inverter Firmware version: V200R023C10SPC200
sDongle present: Yes
sDongle Type: EMMA-A02
sDongle Connectivitiy: Ethernet
sDongle Firmware: SmartHEMS V100R024C00SPC101
Power meter present: three phase
Optimizers Present: Yes
Battery: LUNA2000-15KW-C0
Battery Firmware version: V100R002C00SPC624
Huawei Solar integration version:

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

I can not turn on debug mode

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)

[wlcrs]

This issue seems to be caused by a connection failure or an unstable connection to the inverter. This integration already has already implemented a lot of logic to automatically recover from connection failures or unstable connections. The three most important ones are:

• automatic reconnects if the connection to the inverter failed;
• each Modbus request is retried for up to 6 times, with increasing waits between each attempt to allow the connection to recover;
• after 3 failed Modbus requests the connection is reset to fix hanging connections.

Please understand that I cannot help you solve your connection failure or unstable connection. Consider an alternative connection method.
If you are convinced that there is no connectivity issue, then I invite you to debug and fix the problem yourself and submit a pull request to the underlying huawei-solar Python library. Your input would be greatly appreciated.

As there is nothing actionable for me to do in this issue, I'm closing it. You are welcome to open a topic in Discussions: Connecting to the inverter to get community support for your problem.