Expander - MCP23017
Using an MCP23017 Expander as a Virtual Board (16 Pin Digital IO). Pins 15-17 are used to set the I2C hardware address. By default, these pins must be connected to ground. See page eight of the data sheet
Breadboard for "Expander - MCP23017"
Fritzing diagram: docs/breadboard/expander-MCP23017.fzz
Run this example from the command line with:
node eg/expander-MCP23017.js
var five = require("johnny-five");
var board = new five.Board();
board.on("ready", function() {
var virtual = new five.Board.Virtual(
new five.Expander("MCP23017")
);
var leds = new five.Leds(
Array.from({ length: 8 }, function(_, i) {
return new five.Led({ pin: i * 2, board: virtual });
})
);
leds.on();
this.repl.inject({
leds: leds
});
});
License
Copyright (c) 2012, 2013, 2014 Rick Waldron waldron.rick@gmail.com Licensed under the MIT license. Copyright (c) 2016 The Johnny-Five Contributors Licensed under the MIT license.