• 1
    Step 1
    I followed that tutorial to build the cable
  • 2
    Step 2

    Connect the Roomba RX wire to Arduino pin 0 (RX) and Roomba TX to Arduino pin 1 (TX).

  • 3
    Step 3

    To power the Arduino, you’ll need to convert the 20 volts from Roomba to 5 volts using a 7805 5V voltage regulator (see theses instructions).