function connectToAwsIot() {
    var options = {
        host: awsIotConfig.endpoint,
        port: 8883,
        protocol: 'mqtt',
        cert: atob(awsIotConfig.clientCertificate),
        key: atob(awsIotConfig.privateKey),
        ca: atob(awsIotConfig.caCertificate)
    }

    console.log('Connecting to AWS IoT...');

    require('tls').connect(options, function (res) {
        console.log('TLS handshake successful');
        mqtt.connect(res);
    });

    mqtt.on('connect', function () {
        console.log('MQTT connection successful');
        digitalWrite(pinLedGreen, false);

        console.log('Subscribing to ' + awsIotConfig.responseTopic);
        mqtt.subscribe(awsIotConfig.responseTopic);

        setPinModes();
        setupWatches();
    });

    mqtt.on('publish', function (pub) {
        console.log('Received message on ' + pub.topic + ': ' + pub.message);
    });

    mqtt.on('disconnected', function () {
        digitalWrite("B13", true);
        console.log('Disconnected from AWS IoT');
    });

    mqtt.on('error', function (err) {
        console.log('Error during AWS IoT connection: ' + err);
    });
}