Unknown BMS in Cerrnns/Bemory Lifepo4 battery and how to get data for HomeAssistant from the battery

[Vermond1]

I have in addition to 2 seplos ver. 2.0 batteries 3 other unknown brand bms'sen (100 Ah batteries) , also with RS485 port. This bms I read out with the Seplos Yaml, to see what is reported.
Attached a logfile, obtained by the Seplos Yaml and a picture from the used software.

• Question: what is the way to “translate” the information in the logfile into useful numbers for HomeAssistant?

logs_cerrnns1-bms_logs_uitgebreid (1).txt

[syssi]

Could you provide a better screenshot? How do you retrieve the measurements at the moment? It looks like a HTML file from your harddisk.

[Vermond1]

They are in parallel this moment, baudrate software = 9600.
I have a new logfile, through the Seplos-Yaml, with Hex?information(TXT file)
logs_cerrnns1-bms_logs.txt

[syssi]

Could you use this YAML configuration to dump the traffic to the log? The RX pin of the RS485 converter must be attached to GPIO4: https://github.com/syssi/esphome-seplos-bms/blob/main/tests/esp8266-uart-sniffer.yaml

[Vermond1]

logs_cerrnns1-bms_run (1).txt
Is this the right file?

[syssi]

This is the traffic in ASCII. >>> indicates requests of the Windows application. <<< is the dedicated response from the BMS:

>>> ~22004A510000FDA1
<<< ~22004A00604654325F47202020202020445230312020202020203136533130304A4330330200030101EFCA

>>> ~22004AB0600A000103FF02FB6C
<<< ~22004A0040EEB0000103FF714A44324D30323133303931322033202020202020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00C047

>>> ~22004A42E00200FD2A
<<< ~22004A00E0C600259B14B8100CF40CF10CF40CF30CF50CF30CF30CF30CF40CF40CF50CF30CF30CF20CF40CF100B400B400B40400BE00BE00BE00B4FEBE00000064012710259B00C8000000020000000000230000000000000000000000000000000000000000000000D3D7

>>> ~22004A42E00200FD2A
<<< ~22004A00E0C600259A14B8100CF20CF20CF40CF30CF50CF30CF40CF30CF40CF40CF50CF30CF40CF30CF40CF100B400BE00BE0400BE00BE00BE00BEFEBE00000064012710259A00C8000000020000000000230000000000000000000000000000000000000000000000D3A4

>>> ~22004A42E00200FD2A
<<< ~22004A00E0C600259A14B8100CF20CF20CF40CF30CF40CF40CF30CF40CF30CF50CF40CF30CF30CF30CF30CF200BE00B400B40400BE00BE00BE00B4FEC500000064012710259A00C8000000020000000000230000000000000000000000000000000000000000000000D3D7

>>> ~22004A510000FDA1
<<< ~22004A00604654325F47202020202020445230312020202020203136533130304A4330330200030101EFCA

>>> ~22004AB0600A000103FF02FB6C
<<< ~22004A0040EEB0000103FF714A44324D30323133303931322033202020202020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00C047

>>> ~22004A42E00200FD2A
<<< ~22004A00E0C600259A14B8100CF20CF20CF40CF40CF40CF40CF30CF40CF30CF40CF50CF40CF30CF30CF30CF100B400B400B40400BE00BE00BE00B4FEC500000064012710259A00C8000000020000000000230000000000000000000000000000000000000000000000D3E7

>>> ~22004A42E00200FD2A
<<< ~22004A00E0C600259A14B8100CF20CF20CF40CF30CF40CF40CF30CF40CF40CF50CF50CF30CF40CF30CF30CF100B400BE00BE0400BE00BE00BE00BEFEC500000064012710259A00C8000000020000000000230000000000000000000000000000000000000000000000D3B3

>>> ~22004A42E00200FD2A
<<< ~22004A00E0C600259A14B8100CF30CF10CF50CF30CF50CF30CF40CF30CF40CF30CF60CF30CF40CF30CF40CF000B400B400B40400BE00BE00BE00B4FEBE00000064012710259A00C8000000020000000000230000000000000000000000000000000000000000000000D3D7

>>> ~22004A510000FDA1
<<< ~22004A00604654325F47202020202020445230312020202020203136533130304A4330330200030101EFCA

The protocol looks very similar to the protocol of the Seplos BMS.

[Vermond1]

I experimented a bit further: after reading through the Bojianq discussion, I set the protocol version to 0x22 in the Bojanq_example.yaml. This setting gives values in the Yaml log. In HomeAssistant it now also displays values, just not the right values in the right place.
Chatgpt then tried to explain a lot to me, but this is where my knowledge of the matter really stops.
In addition the logfile:
logs_cerrnns1-bms_run (4).txt