Omega2 GPIO

Control Onion Omega2 GPIO pins from Node (fast-gpio wrapper).

Installing all the things

Dependencies

Firstly upgrade the firmware (as fast-gpio was knackered in the first few generations) then the other dependencies:

oupgrade
opkg update
opkg install nodejs
opkg install npm

Add this module to your project

npm install --save o2-gpio

Usage

'use strict';
const Omega2Gpio = require('omega2-gpio'),
  gpio = new Omega2Gpio();

gpio.tests()
.then(() => {
    // Output pins (digital)
    let outputA = gpio.pin(11);
    let outputB = gpio.pin({
      pin: 12,
      debugging: true
    });

    // Set value [0, 1, true, false]
    outputA.set(1);
    outputB.set(true);

    // Get value
    console.log(outputA.get());
    console.log(outputB.get());

    // Input pins (digital)
    let inputA = gpio.pin({
      pin: 10,
      mode: 'input'
    });

    // Read value synchronously
    console.log('Value: ' + inputA.get());

    // Read value asynchronously
    inputA.getPromised().then(value => {
      console.log('Value: ' + value);
    });

    // Simple blink (say, if you have an LED connected to gpio pin 11)
    let ledPin = gpio.pin(11),
      blink = true;
    let blinkInterval = setInterval(() => {
      console.log((blink ? '^_^' : '-_-') + '\n');
      ledPin.set(blink);
      blink = !blink;
    }, 500);

    // Stop blinking after a while
    setTimeout(() => {
      clearInterval(blinkInterval);

      // PWM output
      ledPin.pwm({
        frequency: 5, // hz
        duty: 75 // percentage (0 -> 100)
      });
    }, 4000);
}