Hello All,
I’m working on the connection to my ComfoAir 350 (RJ45 Port with RS232). I started with an USB to RJ45 cable with Ftdi-Chip. Well, as a result the USB plug get very hot and the ComfoAir stoped working. After unplugging the RJ45 it was fine again. I have checkt cable and port:
RJ45 Port:
Pin 1: 12V
Pin 2: RS232 RX ComfoAir
Pin 3: RS232 TX ComfoAir
Pin 4: RA7 / PIC18 (function unknown)
Pin 5: RB2 / PIC18 (function unknown)
Pin 6: RA6 / PIC18 (function unknown)
Pin 7: RB1 / PIC18 (function unknown)
Pin 8: GND
FTDI Cable:
Pin 1: RTS
Pin 2: DTR
Pin 3: TXD
Pin 4: GND
Pin 5: GND
Pin 6: RXD
Pin 7: DSR
Pin 8: CTS
Looks like it doen’t match and the 12V cause the plug to geht hot.
I have found an other USB Stick. It’s USB to TTL with a CP2102 chip and this pinout:
Pin 1: 3,3V
Pin 2: TXD
Pin 3: RXD
Pin 4: GND
Pin 5: +5V
Is that someting i can work with, or do I need other hardware?
Bye,
Christian