led_serial

#define PIN_ID 13

void setup() {
  Serial.begin(9600);
  pinMode(PIN_ID, OUTPUT); 
}

void loop() {
  if (Serial.available() > 0) {

    String command = Serial.readString();

    if (command == "on") {
      digitalWrite(PIN_ID, HIGH);
    }
    
    if (command == "off") {
      digitalWrite(PIN_ID, LOW);
    }
      
  }

}

led_serial_voice_recognition.js

/*
*	
*	led_serial_button
*	by @josejuansanchez
*
*/

var serial;

// Start connection with arduino
ui.addButton("Start", 0, 0, ui.screenWidth, 300).onClick(function() { 
	
    // Connect
    serial = boards.connectSerial(9600, function(connected) {
    	console.log("Connected " + connected);
	});

});


// Led on
ui.addButton("Led on", 0, 300, ui.screenWidth, 400).onClick(function(){
    serial.write("on");
});

// Led off
ui.addButton("Led off", 0, 700, ui.screenWidth, 400).onClick(function(){
    serial.write("off");
});

main.js

/*
*	
*	led_serial_button
*	by @josejuansanchez
*
*/

var serial;

// Start connection with arduino
ui.addButton("Start", 0, 0, ui.screenWidth, 300).onClick(function() { 
	
    // Connect
    serial = boards.connectSerial(9600, function(connected) {
    	console.log("Connected " + connected);
	});

});


// Led on
ui.addButton("Led on", 0, 300, ui.screenWidth, 400).onClick(function(){
    serial.write("on");
});

// Led off
ui.addButton("Led off", 0, 700, ui.screenWidth, 400).onClick(function(){
    serial.write("off");
});

read_from_arduino.js

ui.backgroundColor(255, 255, 255);

var dataLabel = ui.addText("Data: ", 10, 440, ui.screenWidth, ui.screenHeight);

dataLabel.textSize(50);
dataLabel.color("#000000")

var serial; 

// Start connection with arduino
ui.addButton("Connect", 0, 0, ui.screenWidth, 400).onClick(function() { 
	
    serial = boards.connectSerial(9600, function(connected) {
    	console.log("Connected: " + connected);
	});

    // Show arduino data incoming
	serial.onNewData(function(data) {
		dataLabel.setText("Data: "+ data);
		console.log(data);
		//media.textToSpeech("tick"); 
	});

});