Ensure entity_id is lowercase for all slaves

[kcoffau]

Refactor entity_id assignment to ensure lowercase format for all cases. Required for HA 2026.2.0

Breaking change

HA 2026.2.0 requires all entities to be lowercase. Some entities from Victron contain capitals, such as L1, L2 etc.
We now convert these to lower case.

Has been tested to not impact existing integrations, automations, graphs etc.

Old Entity ID: sensor.victron_system_consumption_L1
New Entity ID: sensor.victron_system_consumption_l1

Proposed change

Update sensor.py to include ".lower()" at the end of the Sensor naming convention on line 161 and 164. Suggested update by @ondrom111 on case #407.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes Add-on doesn't work with HA 2026.2.0 - grid-related entities are unavailable #406 Fix: InvalidEntityID due to uppercase letters in entity_id #407
• This PR is related to issue: HA 2026.2.0 breaks entities with capitals in code.
• Link to documentation pull request: Fix: InvalidEntityID due to uppercase letters in entity_id #407

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• The code has been formatted using Ruff (ruff format custom_components/victron)

[kcoffau]

Can add labels, sorry.

[kcoffau]

Also fixes #405

[mr-p666]

Tested in my environment.
Works again! (y)

[mr-p666]

Looks reasonable. ;-)

[mr-p666]

And as @ondrom111 already mentioned, these files also need to be updated.

binary_sensor.patch
button.patch
number.patch
select.patch
switch.patch

[pos-ei-don]

Isbthere a Fork wäre the Patches are applied? So i can Update without manually changing Files? I am remote currentpy and changing Files in the cell Phone ist no fun

[kcoffau]

And as @ondrom111 already mentioned, these files also need to be updated.

binary_sensor.patch button.patch number.patch select.patch switch.patch

Did you make these changes, or you want me to add another PR?

[andreas-bulling]

@sfstar would be great if you could accept the pull request and publish a new version so that we don't have to manually edit files. Thanks!

[kcoffau]

The remaining files have been updated with lowercase. Ive included #400 as well in this (typo)

[pos-ei-don]

Can you create a Release in your Fork, so i can use IT untlil sfstar creatrs a New Release?

[kcoffau]

Can you create a Release in your Fork, so i can use IT untlil sfstar creatrs a New Release?

Ive created one but im unsure it will work as you usually need to do a heap of stuff to make HACS acknowledge it as a new integration, which takes weeks. But if you can get it to work, then coolio!

[pos-ei-don]

Ive created one but im unsure it will work as you usually need to do a heap of stuff to make HACS acknowledge it as a new integration, which takes weeks. But if you can get it to work, then coolio!

Thank you, but you are right, it did not work.. i wonder why, because i did this before......

[sfstar]

Thanks for submitting this PR. Will review and release it this afternoon

[sfstar]

LGTM, will test migration of historical data and provide migration function and then release this on 0.7.x release (also containing new registers).

[andreas-bulling]

@sfstar that'd be great. Looking forward to 0.7!