VOICE CONTROLLED LEDS USING ARDUINO AND BLUETOOTH(HC-05)

Rakshith S

6th Sem BCA, NCMS

Controlling LEDs with voice command seems to be a difficult task, but it’s easy and you can quickly build it. We just need an Arduino UNO to serially communicate with HC-06 Bluetooth module and a smartphone to send voice command to Bluetooth module HC-06. For receiving voice command we are using “Arduino Bluetooth Voice Controller” android app which you can download from play store (link is given below)

Material Required

• Arduino UNO
• HC-06 Bluetooth Module
• LEDs (Red, and Green)
• Resistor 220 ohm (2 nos.)
• Arduino Bluetooth Voice Controller (https://play.google.com/store/apps/details?id=appinventor.ai_nitinpandit_00.Arduino_bluetooth_voice_controller&hl=en_IN)
• Breadboard
• Connecting wires

SOURCE CODE:

#include <SoftwareSerial.h>

String value;

int TxD = 11;

int RxD = 10;

int servoposition;

SoftwareSerial bluetooth(TxD, RxD);

void setup() {

  pinMode(2, OUTPUT);

  pinMode(3, OUTPUT);

  Serial.begin(9600);       // start serial communication at 9600bps

  bluetooth.begin(9600);

}

void loop() {

  Serial.println(value);

 if (bluetooth.available())

   {

    value = bluetooth.readString();

    if (value == "all LED turn on"){

    digitalWrite(2, HIGH);

    digitalWrite(3, HIGH);  

      }

    if (value == "all LED turn off"){

      digitalWrite(2, LOW); 

      digitalWrite(3, LOW);       

      }

    if (value == "turn on Red LED"){

    digitalWrite(2, HIGH); 

      }

    if (value == "turn on green LED"){

      digitalWrite(3, HIGH);       

      }

      

    if (value == "turn off red LED"){

    digitalWrite(2, LOW); 

      }

    if (value == "turn off green LED"){

      digitalWrite(3, LOW);       

      }

 }

}