func setUpMQTT() {
    let clientID = "CocoaMQTT-" + String(ProcessInfo().processIdentifier)
    mqtt = CocoaMQTT(clientID: clientID, host: "846.846.98.71", port: 8883)
    mqtt.username = "test"
    mqtt.password = "public"
    mqtt.willMessage = CocoaMQTTWill(topic: "/will", message: "dieout")
    mqtt.keepAlive = 60
    mqtt.connect()
    mqtt.delegate = self
}