The hello world of the arduino world, blinking the led.
Blink the led connected to port 13 on the Arduino UNO board. The blinking will synchronize with the printing of a dot on stdout.
Depending on your set-up, you will need to change the path to the
USB board. If you have problems, try changing the first argument
True in the call to
withArduino, which will hopefully print
a useful diagnostic message.