Scott Penrose

JohhnyFive Events

Scott Penrose is a perl hacker with an interest in home automation. He has been playing with electronics since he was old enough to burn his fingers with a soldering iron.

Johnny Five Events

Most of the objects emit events. A pin can be used like this:

#!JavaScript
        var out1 = new five.Pin(4);
        out1.on('high', function() {
                console.log('We got a high', this.addr);
        });

Yes this is an output but you still get the events fired. Sometimes...

#!JavaScript
  out1.low(); out1.high();    // Triggers event
  out1.write(0); out1.write(1); // FAILS to trigger event
  board.digitalWrite(4, 0); board.digitalWrite(4, 1); // FAILS to trigger event

This means you have to be clever programmatically for calling the high/low method from a value, e.g. out1[ value ? 'high' : 'low'](); So be very careful.

  • Arduino
  • Javascript
  • Edison
  • RaspberryPi