Galileo-io
Galileo-io is a Firmata-compatibility IO class for writing node programs that run on and interact with the Intel Galileo.
Getting Started
See Intel Galileo setup. Galileo-io scripts are run on the Galileo board itself, via its "full Linux" installation.
Installation
npm install galileo-io
Usage
This module can be used an IO plugin for Johnny-Five.
Blink an Led
The "Hello World" of microcontroller programming:
var Galileo = require("galileo-io");
var board = new Galileo();
board.on("ready", function() {
var byte = 0;
this.pinMode(9, this.MODES.OUTPUT);
setInterval(function() {
board.digitalWrite(9, (byte ^= 1));
}, 500);
});Johnny-Five IO Plugin
Galileo-IO is the default IO layer for Johnny-Five programs that are run on an Intel Galileo board.
API
digitalWrite(pin, 1|0)
Sets the pin to 1 or 0, which either connects it to 5V (the maximum voltage of the system) or to GND (ground).
Example:
// This will turn on the pin
board.digitalWrite(9, 1);analogWrite(pin, value)
Sets the pin to a value between 0 and 255, where 0 is the same as LOW and 255 is the same as HIGH. This is sort of like sending a voltage between 0 and 5V, but since this is a digital system, it uses a mechanism called Pulse Width Modulation, or PWM. You could use analogWrite to dim an LED, as an example.
Example:
// Crank an LED to full brightness
board.analogWrite(9, 255);servoWrite(pin, value) This is an alias to analogWrite
digitalRead(pin, handler) Setup a continuous read handler for specific digital pin.
This will read the digital value of a pin, which can be read as either HIGH or LOW. If you were to connect the pin to 5V, it would read HIGH (1); if you connect it to GND, it would read LOW (0). Anywhere in between, it’ll probably read whichever one it’s closer to, but it gets dicey in the middle.
Example:
// Log all the readings for 9
board.digitalRead(9, function(data) {
console.log(data);
});analogRead(pin, handler) Setup a continuous read handler for specific analog pin.
This will read the analog value of a pin, which is a value from 0 to 4095, where 0 is LOW (GND) and 4095 is HIGH (5V). All of the analog pins (A0 to A5) can handle this. analogRead is great for reading data from sensors.
Example:
// Log all the readings for A1
board.analogRead("A1", function(data) {
console.log(data);
});License
See LICENSE file.