Controlling the HDMI 2.1 KVM via serial console

Hardware
1

Has anyone been able to successfully control the KVM via the RJ11 console port? I’ve tried an assortment of RJ11 to RS232 adapters/cables and even created a special cable based on the spec but I can’t communicate with the device. It’s unclear to me if the commands I’m inputting are incorrect but at best I’ve been able to get garbage data back from the KVM. Using pyserial I’ve been issuing commands like:

  • ser = serial.Serial(port='/dev/ttyUSB0', baudrate=19200, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS)
  • ser.write(b'V = 2\r\n')
  • ser.write(b'V=2\r\n')
2

Have you seen this area of the manual?

Serial commands_HDMI2.1 KVM

3

Yeah I did but I can’t for the life of me send any sort of command successfully. I abandoned this though and had better success with the keypad input.