@iiot2k/gpiox/examples/blink_gpio.js

Input/Output on any gpio library

/*
 * example blinks gpio output 
 *
 * run:
 * > node blink_gpio.js
 *
 */


"use strict";

const gpiox = require("../gpiox");

const PIN_INPUT = 21;
const PIN_OUTPUT = 20;

const BLINK_1 = 500; // ms
const BLINK_2 = 1500; // ms

const DEBOUNCE_US = 1000; // us

console.log("*** blink gpio node.js example ***");
console.log("stop program with Ctrl+C");

// init gpio
gpiox.init_gpio(PIN_INPUT, gpiox.GPIO_MODE_INPUT_PULLUP, DEBOUNCE_US);
gpiox.init_gpio(PIN_OUTPUT, gpiox.GPIO_MODE_OUTPUT, 0);

// depends on input blink output
if (gpiox.get_gpio(PIN_INPUT))
    gpiox.blink_gpio(PIN_OUTPUT, BLINK_1);
else
    gpiox.blink_gpio(PIN_OUTPUT, BLINK_2);

// prevent stop program
var id_intv = setInterval(function() {}, 100);

process.on('SIGINT', () => {
    clearInterval(id_intv);
    console.log(" -> program stopped");
    process.exit();
});