If you don&#x27;t have the cable, an arduino uno also works as a usb to serial adapter.<p><a href="https:&#x2F;&#x2F;www.arduino.cc&#x2F;en&#x2F;Tutorial&#x2F;ArduinoToBreadboard" rel="nofollow">https:&#x2F;&#x2F;www.arduino.cc&#x2F;en&#x2F;Tutorial&#x2F;ArduinoToBreadboard</a><p>To make 3.3V out of 5V you can use a voltage regulator.