Hello. To connect Pylontech (CONSOLE) to laptop you need : a ) USB to RS232 (female) convertor FTDI chip and b ) one cable RS232 (male) to RJ45 with pinout : 232 Tx pin 3 to RJ45 pin 3 ; 232 Rx pin 2 to RJ45 pin 6 ; 232 GND pin 5 to RJ45 pin 8. All the best.