Expander - PCF8574

Using an PCF8574 Expander as a Virtual Board (WaveShare 8 Pin Digital IO)

Breadboard for "Expander - PCF8574"

Fritzing diagram: expander-PCF8574.fzz

 

Run this example from the command line with:

node eg/expander-PCF8574.js

const { Board, Expander, Leds } = require("johnny-five");
const board = new Board();

board.on("ready", () => {
  const virtual = new Board.Virtual(
    new Expander("PCF8574")
  );

  const leds = new Leds(
    Array.from(Array(8), (_, pin) =>
      ({ pin, board: virtual })
    )
  );

  leds.blink(500);

  board.repl.inject({
    leds
  });
});

 

Component Classes in this example: