Daly BMS "Failed setup, will retry: device communication timed out" since v1.7.0

[flibble2000]

Checklist

• I have tried the latest version of BMS_BLE-HA.
• I have enabled debug logging for my installation.
• This issue only contains 1 issue (if you have multiple issues, open one issue for each issue).
• This issue is not a duplicate issue of any previous issue.
• I have filled out the issue template to the best of my ability.

Provide the type of BMS you used:

Daly BMS

Describe the issue

Hi,

Thank you for the integration, it has been incredibly useful.

Since v1.7 I am unable to connect to my Dalys BMS. Rolling back to v1.6.4 fixes the problem.

I am using the BT proxy on ESPHome 2024.10.3 and BT signal strength is -48db. The same BT proxy is used for 2 Victron devices, I've disabled the Victron integration, but it's not helped.

Personally, I'm not bothered as I'll continue with v1.6.4. But hopefully this'll help for future builds if it's a fault.

Reproduction steps

1. Upgrade to any version v1.7.0 onwards
2. 
3.
...

Debug logs

esphome.log
home-assistant_bms_ble_2024-11-17T09-13-35.360Z.log

[patman15]

@flibble2000 thanks for raising this and providing a log! I suspect it has (again) to do with a previous request to add the MOS temperature value which is not present on all BMS of this type. Could you please try the modified code on the branch (see column on the right "Development") by following the instructions for manual installation? If you could provide a log again that would be awesome!

[flibble2000]

Nice one! Thanks, give me a day or two and I'll report back.

[flibble2000]

Hi,

That has fixed it, logs attached.

home-assistant_bms_ble_2024-11-18T11-06-34.729Z.log

[patman15]

Great, thanks for the feedback! I'm sorry for the regression, but there seem to be 3 types of Daly BMS

1. with MOS temperature sensor
2. without but responding to the request
3. without and not responding to the request

On request, I added the sensor and now you unfortunately found the 3rd type. I will fix it with the next release in a clean way. Thanks for being patient and reporting the issue! Without having such a battery there is no chance to figure that out in advance since specifications are practically non-existent.

[flibble2000]

Not a problem, I'm glad I could assist. Thank you for all you hard work.