Add seplos stacked batteries attributes

[ouinouin]

Checklist

• I have filled out the template to the best of my ability.
• I have understood that this integration is only about battery management systems with Bluetooth Low Energy support.
• This only contains 1 feature request (if you have multiple feature requests, open one feature request for each feature request).
• This issue is not a duplicate of any previous feature requests.

Please describe the enhancement you would like to have.

Hi, first of all thanks for your implementation of the seplos BLE protocol.
I ows 2 set of 48V LIFEPO4 batteries equipped with seplos 3.0 BMS rev 11.
while stacking multiple seplos bms and connecting the bms with RJ45 cable, they do something clever , only the first battery is reporting through BLE , and its reproting all theinfos from all other racks, so for examples intead of having 16 attributes for the cells voltage, i have 32 attributes for the cell voltage hidden behind the deltaV sensor.
but on the official application, we can also see , the voltage for both units , the SOC for bith units etc etc.
i see this is working for the temperatures and for the cells voltages (i see 8 temperatures (4 per rack). it would be nice to see at least as attributes all individual values, specially for voltage and SOC.

my set of 2 racks is available to test if you re interrested, i m not a coder but can fiddle around if necessary

Additional context

No response

[patman15]

Hi! I think I can add the data per pack as attributes quite easily. Will give it a try and add a branch for you to test. Ok for you? Just need a calm evening.

[ouinouin]

Hi, @patman15
happy to give a try , the calm evening is also a prerequisite here :-) .

[patman15]

@ouinouin pushed an update to the linked branch, can you check and provide me a debug log? Thanks!