client.onConnectionLost = onConnectionLost;

​

let messageSent = "";

let keyboardChannel= "/1234"  

​

function setup() {

  createCanvas(200, 200);

​

  client.connect({

    onSuccess: onConnect,

    userName: "mlSchool",

    password: "380eda76b9b1d2df",

    useSSL: true,

  });

​

  textAlign(CENTER);

}

​

function draw() {

  background(220);

  text("sending messages to "+keyboardChannel, width / 2, 20);

  text(messageSent, width / 2, height / 2);

}

​

​

function keyPressed() {

  sendMessage( "a");

}

​

function onConnect() {

  // Once a connection has been made, send a message.

  console.log("connected to mosquitto");

  setInterval(sendRandomMsg, 10);

}

​

function onConnectionLost(responseObject) {

  if (responseObject.errorCode !== 0) {

    console.log("onConnectionLost:" + responseObject.errorMessage);

  }

}

​

function sendMessage( m) {

  messageSent=m;

  console.log("sending: "+ m);

​

  let message = new Paho.MQTT.Message(m);

  message.destinationName = keyboardChannel;

  client.send(message);

}

​

function sendRandomMsg() {

  let r = floor(random(0, 10));

  switch (r) {

    case 0:

      sendMessage( "UP");

      break;

    case 1:

      sendMessage( "DOWN");

      break;

    case 2:

      sendMessage( "RIGHT");

      break;

    case 3:

      sendMessage( "LEFT");

      break;

    case 4:

      sendMessage( "ENTER");

      break;

    case 5:

      sendMessage( "SPACE");

      break;

    case 6:

    case 7:

    case 8:

    case 9:

      let c = String.fromCharCode(random(33, 127));

      sendMessage(c);

      break;

  }

​

​

}