Getting Error EBUSY: resource busy or locked

Question

Trying to run a Nodejs app to test Raspberry 3 B + Gpio Onoff Module but when i am trying to run the app getting this Error

fs.js:114
throw err;

Error: EBUSY: r         


        

Answer 1

var onoff = require('onoff');
var Gpio = onoff.Gpio,
    led = new Gpio(4, 'out'),
    interval;
interval = setInterval(function () {
    var value = (led.readSync() + 1) % 2;
    led.write(value, function () {
        console.log("Changed LED state to: " + value);
    });
}, 2000);
process.on('SIGINT', function () {
    clearInterval(interval);
    led.writeSync(0);
    led.unexport();
    console.log('Bye, bye!');
    process.exit();
});