Invalid Header

[sragneau]

Hi,

I have an 10E version of the BMS SEPLOS V2 but i can't receive any data from RS485 bus. I bought this boad : and I checked baudrates and it's 19200 like i need when i connect my laptop to the BMS and no problem when i do that.

I used pin D1 and D2 to solder TX, RX connector.

I downloaded debug logs, i don't know if there is something i can do now. logs_seplos_logs (1).txt

[syssi]

How did you connect the ESP to the BMS? Which RS485 module do you use?

[sragneau]

The first port called canbus is connected to my victron cerbox gx, i connect the esp with the next port called RS485A.

[syssi]

You cannot talk directly to the BMS (AFAIK). You have to translate the UART-TTL signal of the ESP into an RS485 signal using a converter module which looks like this: https://raw.githubusercontent.com/syssi/esphome-jnge-mppt-controller/main/images/circuit.jpg

[sragneau]

Ok my links wasn't written into my first post, but i already use this board to convert uart-ttl :

to this esp

[syssi]

Perfect! If you disconnect the BMS from the RS485 module. Does the TX LED blink periodically while the RX LED stays off?

[sragneau]

The tx esp ligth blink every 10s. RX led stay off

I took pictures of my connection

[syssi]

Could you provide your YAML configuration too?

[sragneau]

Yes this my yaml seplos.txt

[sragneau]

It may be that communication between my Cerbo GX and the Victron protocol cannot be used simultaneously with RS485 communication. Do you incorporate the Pylontech protocol in your software?