MEROSS Integration Corrupts Configuration (mqtt_domain Nested null), Preventing HA from Saving Changes

[mauromorello]

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Describe the bug The MEROSS integration in Home Assistant introduces an issue where, upon each restart of Home Assistant, a nested null value is appended to the mqtt_domain configuration. This repeated nesting grows over time, eventually rendering Home Assistant unable to save new configurations or add new integrations.

Here the complete line after a CLEAN start:

      {"created_at":"1970-01-01T00:00:00+00:00","data":{"http_api_endpoint":"https://iot.meross.com","stored_credentials":{"domain":"https://iot.meross.com","issued_on":"2023-10-21T16:04:43.870637","key":"e9ac6fb794f283f320e5c7c95129003c","mqtt_domain":[null],"token":"----------------","user_email":"--------------------","user_id":"---------"}},"disabled_by":null,"discovery_keys":{},"domain":"meross_cloud","entry_id":"----------------","minor_version":1,"modified_at":"2025-01-26T05:53:04.230066+00:00","options":{"custom_user_agent":"MerossHA/1.2.8","lan_transport_mode":"conf_opt_lan_mqtt_only"},"pref_disable_new_entities":false,"pref_disable_polling":false,"source":"user","title":"https://iot.meross.com","unique_id":"https://iot.meross.com","version":1},

Here after one restart of HA:

      {"created_at":"1970-01-01T00:00:00+00:00","data":{"http_api_endpoint":"https://iot.meross.com","stored_credentials":{"domain":"https://iot.meross.com","issued_on":"2023-10-21T16:04:43.870637","key":"----------","mqtt_domain":[[null]],"token":"----------","user_email":"----","user_id":"-----"}},"disabled_by":null,"discovery_keys":{},"domain":"meross_cloud","entry_id":"564457861b458c90c1aa4e35a9a7ec96","minor_version":1,"modified_at":"2025-01-26T06:26:02.270774+00:00","options":{"custom_user_agent":"MerossHA/1.2.8","lan_transport_mode":"conf_opt_lan_mqtt_only"},"pref_disable_new_entities":false,"pref_disable_polling":false,"source":"user","title":"https://iot.meross.com","unique_id":"https://iot.meross.com","version":1},

Steps to Reproduce With Meross integration installed:

Restart Home Assistant multiple times.

Inspect the internal configuration storage (.storage/core.config_entries).

Observe that the mqtt_domain entry progressively nests null values like this:

"mqtt_domain": [[null]]

After multiple restarts, the nesting increases:

"mqtt_domain": [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[null]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]

Eventually, this corruption prevents Home Assistant from saving any new configurations or integrations, leading to errors.

Your environment HomeAssistant version: 2025.1.4 Hassio Version (if applicable): 14.1 Hardware environment: HA over PROXMOX VM(16G ram) over HP t630 (32G ram)

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[mauromorello]

possible fix in /homeassistant/custom_components/meross_cloud/init.py

            # Override the new credentials and store them into HA entry
            self._cached_creds = self._client.cloud_credentials
            self.hass.config_entries.async_update_entry(
                entry=self._entry,
                data={
                    CONF_HTTP_ENDPOINT: self._cached_creds.domain,
                    CONF_STORED_CREDS: {
                        "token": self._cached_creds.token,
                        "key": self._cached_creds.key,
                        "user_id": self._cached_creds.user_id,
                        "user_email": self._cached_creds.user_email,
                        "issued_on": self._cached_creds.issued_on.isoformat(),
                        "domain": self._cached_creds.domain,
                         "mqtt_domain": [self._cached_creds.mqtt_domain] if isinstance(self._cached_creds.mqtt_domain, str) else [None]
                    },
                },
            )

[shi-vy]

Nice solution, it seems to work in my own tests, and my integrations are saving once again!

PR here

[MrOcin]

Thanks so mutch! This tipp fixed, what makes me crazy since months!!

[nao-pon]

I was experiencing this issue the last few days as well, affecting various integrations and it was bothering me, but this solution saved me! Thanks! 👍

[jHamshaw]

Still not fixed (apart form hotfix above) in main integration? Authentication takes an age on HA restart fails, then authenticates after one or more manual reloads.....

[dsvirdiau]

I can confirm the above change works for me. I was going crazy setting up Tuya and Tesla Custom Integrations every time HA restarted. Thank you @mauromorello 👍

[gabriele-latino]

Same issue and same resolution for me, I hope the fix will be released soon. In my case it broke also Tuya and Tado integrations.

[Jack77777777]

I was struggeling for weeks no with this issue. Tried complete new install with restore, esited several files…. This fix saved my life.

Thank you

[jrondo]

Another fix that worked for me is below:

Edit .storage/core.config_entries

find the meross config and delete the mqtt part like below: "mqtt_domain":[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[["mqtt-eu-4.meross.com"]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]],

then save and restart HA.

[dw1562]

I've been battling this issue for a few weeks now and it has been driving me crazy! I only stumbled across this thread today. I want to give it a try tomorrow and I am hopeful it will fix my problem.

The text shown a few comments above that goes into init.py .... do I just copy/paste that to the end of the init.py file?

UPDATE: I tried the first way and it didn't work. It stopped the integration from loading at all. I then tried the way suggested one post above and that worked fine. I've had 3 niggling issues and making this change fixed them all!

[albertogeniola]

Updating to v1.3.9+ solves the issue.