Hey, I wondered if anyone can confirm if its possible to connect my JBD BMS (JBD-AP21S002) to my LV6548 via can or RS485 to communicate info? I found quiet a few posts looking at the subject and followed a few links as well as a MPP pdf stating communication protocol.
So far ive made a custom rj45 connector and two pin jst plug to my bms. Ive tried PIN 3 RS485N and PIN 5 RS485P in combination with battery type pylon, lib and lic to no avail (fault 61).
On some posts it notes to have a ground connected to pin 8; however my rs485 header has no ground (unless going via the bluetooth dongle header).
I also found this:-
But the combos are endless!
I also found this paid option:-
but if i can avoid the purchase with a simple cable that would be great!
So far ive made a custom rj45 connector and two pin jst plug to my bms. Ive tried PIN 3 RS485N and PIN 5 RS485P in combination with battery type pylon, lib and lic to no avail (fault 61).
On some posts it notes to have a ground connected to pin 8; however my rs485 header has no ground (unless going via the bluetooth dongle header).
I also found this:-
BMS Communication Cables with Solar Inverters & Voltacon Lithium Ion Li-2021 2.4kWh and US2000 Pylontech - Voltacon Solar Blog
Table 1 , contains the pin layout for the most used solar off grid inverters. The Battery port RS485 (RJ45 port) is located on the lithium ion battery Li-2021. Only 2 pin are required for the BMS communication protocol PinNumber Battery RS485 BatteryCAN DEYE Victron Voltronic GOODWE Growatt 1 […]
voltaconsolar.com
But the combos are endless!
I also found this paid option:-
Hardware interface - now for sale · Uksa007 esphome-jk-bms-can · Discussion #16
Hi, This has all the hardware needed to communicate with BMS and Inverter over CAN bus. Hand built on a PCB and soldered to the ESP32, bulletproof design for production use. Don't use modules and D...
github.com
but if i can avoid the purchase with a simple cable that would be great!