DALY BMS (k-type) support for ESPHOME ?

[kirillch2000]

Unfortunately I couldn't find where else to write, so I'm writing to a similar project.

Please make DALY BMS (k-type) support for ESPHOME. Home assistant has a working project (https://github.com/patman15/BMS_BLE-HA) - but it's only for HA, and I'd like to use it together with OpenHab.

[syssi]

Do you have a working setup? So your BMS is accessible via BLE and you could provide some testing?

[syssi]

@kirillch2000 I've prepared a first draft. Do you like to give it a try?

[kirillch2000]

Thank you very much for responding to my request so quickly!

I tried your component - the result is as follows. All 3 of my DALY BMS (2 new - k-type and 1 old - last year's model) - work perfectly and give all the parameters! So this draft should be considered working!

output example:
Name State Actions
daly-bms-ble average cell voltage 3.2399 V
daly-bms-ble capacity remaining 35.1 Ah
daly-bms-ble cell count 16
daly-bms-ble cell voltage 1 3.242 V
daly-bms-ble cell voltage 10 3.239 V
daly-bms-ble cell voltage 11 3.234 V
daly-bms-ble cell voltage 12 3.241 V
daly-bms-ble cell voltage 13 3.235 V
daly-bms-ble cell voltage 14 3.241 V
daly-bms-ble cell voltage 15 3.238 V
daly-bms-ble cell voltage 16 3.240 V
daly-bms-ble cell voltage 2 3.244 V
daly-bms-ble cell voltage 3 3.237 V
daly-bms-ble cell voltage 4 3.245 V
daly-bms-ble cell voltage 5 3.239 V
daly-bms-ble cell voltage 6 3.242 V
daly-bms-ble cell voltage 7 3.241 V
daly-bms-ble cell voltage 8 3.247 V
daly-bms-ble cell voltage 9 3.234 V
daly-bms-ble charging OFF
daly-bms-ble charging OFF
daly-bms-ble charging cycles 52
daly-bms-ble charging power 310 W
daly-bms-ble current -6.70 A
daly-bms-ble delta cell voltage 0.0013 V
daly-bms-ble discharging OFF
daly-bms-ble discharging OFF
daly-bms-ble discharging power 0 W
daly-bms-ble enable bluetooth connection ON
daly-bms-ble error bitmask NA
daly-bms-ble errors
daly-bms-ble factory reset ☐
daly-bms-ble max cell voltage 3.247 V
daly-bms-ble max voltage cell 8
daly-bms-ble min cell voltage 3.234 V
daly-bms-ble min voltage cell 9
daly-bms-ble power 310 W
daly-bms-ble reset charging cycles ☐
daly-bms-ble retrieve settings ☐
daly-bms-ble state of charge 34 %
daly-bms-ble temperature 1 10.0 °C
daly-bms-ble temperature 2 10.0 °C
daly-bms-ble temperature 3 11.0 °C
daly-bms-ble temperature 4 11.0 °C
daly-bms-ble temperature 5 NA
daly-bms-ble temperature 6 NA
daly-bms-ble temperature 7 NA
daly-bms-ble temperature 8 NA
daly-bms-ble temperature sensors 4
daly-bms-ble total voltage 51.80 V

[syssi]

Could you provide some more details about your DALY BMS models/versions? I would like to mention the devices as supported at the README. Could you tell me the BLE name of each device?

[kirillch2000]

Hi. Yes, of course.
These are 2 new Daly Smart BMS K-Series 100A
https://www.dalybms.com/48v-lifepo4-bms-daly-k-series-smart-bms-3s-to-24s-40a-60a-100a-product/
The older one is probably A-series (looking at the manufacturer's website, I have not seen this mentioned anywhere else, in ESPHOME DOC this model is simply called DALY BMS (for UART)).
BLE names are those that are visible as their names? then - DL-xxxxxxxxxxxxxxxx (mac address) and Dxxxxxxxxxxxxxxxx
Contact me, I can scan their profiles and anything else if needed - I have this equipment at home.

[syssi]

Did DALY change the protocol over time or does your old DALY BMS support boths protocol (the one with the 0xA5 preamble and the 0xD2 preamble)?

[kirillch2000]

HI !
Unfortunately, I have not studied the details of the old version protocol. It was important for me to connect new (k-type) versions.
If there is such a need - can you make a trial version of the driver for logging and studying this issue and I can run it on a separate ESP32 with a connection to this BMS

[syssi]

It's not so important. The mystery will be solved some day.

I've another request: I've implemented some switches and buttons:

button:
  - platform: daly_bms_ble
    retrieve_settings:
      name: "${name} retrieve settings"
    restart:
      name: "${name} restart"
    shutdown:
      name: "${name} shutdown"
    factory_reset:
      name: "${name} factory reset"
    reset_current:
      name: "${name} reset current"

# ...

switch:
  - platform: daly_bms_ble
    charging:
      name: "${name} charging"
    discharging:
      name: "${name} discharging"

Could you test these (excluding the factory reset and reset current button)?

[kirillch2000]

Ok, I'll test these buttons tomorrow.

[syssi]

Did you find some time to test the controls?

[felipecrs]

Not sure if you are aware, but there is a PR on ESPHome adding support for Daly H/K/M/S:

• Daly H/K/M/S-Series BMS integration esphome/esphome-docs#4296

[syssi]

Thanks for the hint! I wasn't aware of the PR. A lucky detail: The PR is focused on uart communication. This project is mostly about BLE communication.

[syssi]

Interesting.. some registers are different: https://github.com/esphome/esphome/pull/7524/files#diff-7100260b820cb090bf4ad0f7d9d9b7fc105a49a0a5b4efd6287a3e70c474b33fR37-R48

[kirillch2000]

It's not so important. The mystery will be solved some day.

I've another request: I've implemented some switches and buttons:

button:
  - platform: daly_bms_ble
    retrieve_settings:
      name: "${name} retrieve settings"
    restart:
      name: "${name} restart"

............................

Could you test these (excluding the factory reset and reset current button)?

Sorry for the delay - I was on vacation. I added these buttons - I certainly didn't do a factory reset :) - everything else looks like it's working - "BMS retrieve settings" I still don't understand how it works - there are no statistics updates, and the data is only received by the component interval (update_interval)