comma serial

The comma serial gets you access to a low level serial console on your comma three, while providing a stable 12V to power the device.

The serial is available on the comma shop.


  • Connect all three cables to the serial

  • Connect the USB A to your computer

  • Connect the USB-C to the OBD-C port on your comma three


sudo screen /dev/ttyUSB0 115200

or use to run the previous command in a loop.

The username and password are both comma.