Error with local Rexel EasyConnect v2

[adrienneo19]

Description:

I'm trying to add my Rexel Energeasy Connect 2 gateway using the Overkiz Local API integration.

The cloud integration works without any issue (same account, same gateway), but the Local API setup always fails.

Environment
Home Assistant: HAOS 2026.7
Overkiz integration
Gateway: Rexel Energeasy Connect 2
Local API enabled
Local API token generated from the Energeasy Connect app
Gateway reachable at:
gateway-1212-7647-9199.local:8443
192.168.1.194:8443
Steps to reproduce
Add the Overkiz integration.
Select Local API.
Configure the gateway using the hostname or IP address.
Complete the setup.
Expected behavior

The gateway should be added successfully using the Local API.

Actual behavior

The config entry fails during setup with the following exception:

KeyError: 'auth_implementation'

Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/overkiz/init.py", line 107, in async_setup_entry
client = await create_rexel_client(hass, entry)
File "/usr/src/homeassistant/homeassistant/components/overkiz/init.py", line 350, in create_rexel_client
await config_entry_oauth2_flow.async_get_config_entry_implementation(
File "/usr/src/homeassistant/homeassistant/helpers/config_entry_oauth2_flow.py", line 661
implementation = implementations.get(config_entry.data["auth_implementation"])

KeyError: 'auth_implementation'
Additional information
The Cloud API works correctly with the same account.
The issue only occurs with the Local API.
I removed and recreated the integration several times and restarted Home Assistant.
The error happens with both the .local hostname and the gateway IP address.

It looks like the Local API setup is trying to access an OAuth field (auth_implementation) that does not exist in the config entry, suggesting the Rexel Local API flow may incorrectly reuse part of the cloud authentication setup.

[iMicknl]

@adrienneo19 how did you find this repository? As this is an issue in Home Assistant, it should be reported at https://github.com/home-assistant/core/issues.

[iMicknl]

I could reproduce your issue by the way, and a fix is ready via home-assistant/core#175409. Hopefully it will ship on time for the next minor update.

[adrienneo19]

Sorry for posting in the wrong place, but thanks a lot anyway. I was able to do it by selecting “Somfy Local” instead of “EasyConnect.” Does that make a difference?

[iMicknl]

I was wondering how you found this repository, since it's not very well known. Perhaps we're linking to it in the wrong place somewhere.

Somfy Local will also work, but if Rexel-specific changes are added in the future, it might stop working. The only cosmetic difference is that choosing Rexel shows "Rexel" as the manufacturer for devices with no manufacturer set. By the way, once you update to 2026.7.1, you can use the Rexel Local API again.