Pace Battery Management System
This addon comes with absolutely no guarantees whatsoever. Use at own risk.
Feel free to fork and expand!
When viewed into the RJ11 socket, tab to the bottom, pins are (in my device) ordered:
1:NC 2:GND 3:BMS_Tx 4:BMS_Rx 5:GND 6:NC
Either a direct serial interface from your hardware, a USB to serial, or a network connected TCP server device will work. Note the voltage levels are normal RS232 (and not TTL / 5V or something else).