Voice Based Light Toggle With Android App In Arduino Mega 2560

Introduction

• In this article, I will explain the voice-based light ON/OFF with the Android app In Arduino Mega 2560.
• It can be fully controlled by voice.
• It can be controlled by the app.

Parts Of Lists

• Arduino Mega2560
• Bluetooth
• LEDs- 05
• Hook-Up Wires
• Bread Board

Connection

 

Step 1: Connection from Bluetooth To Arduino Mega 2560

 

Bluetooth	Board
Vcc	5v
Gnd	Gnd
Tx	Rx
Rx	Tx

 

Step 2: Connection for the LEDs

 

Leds	Postive side	Negative side
Led1	12	Gnd
Led2	13	Gnd
Led3	14	Gnd
Led4	15	Gnd
Led5	16	Gnd

 

Programming

//Coded By: Angelo Casimiro (4/27/14)
//Voice Activated Arduino (Bluetooth + Android)
//Feel free to modify it but remember to give credit
String voice;
int
led1 = 12, //Connect LED 1 To Pin #2
    led2 = 13, //Connect LED 2 To Pin #3
    led3 = 14, //Connect LED 3 To Pin #4
    led4 = 15, //Connect LED 4 To Pin #5
    led5 = 16; //Connect LED 5 To Pin #6
//--------------------------Call A Function-------------------------------//
void allon()
{
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led5, HIGH);
}
void alloff()
{
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    digitalWrite(led5, LOW);
}
void setup()
{
    Serial.begin(9600);
    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
    pinMode(led3, OUTPUT);
    pinMode(led4, OUTPUT);
    pinMode(led5, OUTPUT);
}
void loop()
{
        while (Serial.available()) { //Check if there is an available byte to read
            delay(10); //Delay added to make thing stable
            char c = Serial.read(); //Conduct a serial read
            if (c == '#')
            {
                break;
            } //Exit the loop when the # is detected after the word
            voice += c; //Shorthand for voice = voice + c
        }
        if (voice.length() > 0)
        {
            Serial.println(voice);
            //----------Control Multiple Pins/ LEDs----------//
            if (voice == "*all on")
            {
                allon();
            } //Turn Off All Pins (Call Function)
            else if (voice == "*all off")
            {
                alloff();
            } //Turn On  All Pins (Call Function)

            //----------Turn On One-By-One----------//
            else if (voice == "*TV on")
            {
                digitalWrite(led1, HIGH);
            } else if (voice == "*fan on")
            {
                digitalWrite(led2, HIGH);
            } else if (voice == "*computer on")
            {
                digitalWrite(led3, HIGH);
            } else if (voice == "*bedroom lights on")
            {
                digitalWrite(led4, HIGH);
            } else if (voice == "*bathroom lights on")
            {
                digitalWrite(led5, HIGH);
            }
            //----------Turn Off One-By-One----------//
            else if (voice == "*TV off")
            {
                digitalWrite(led1, LOW);
            } else if (voice == "*fan off")
            {
                digitalWrite(led2, LOW);
            } else if (voice == "*computer off")
            {
                digitalWrite(led3, LOW);
            } else if (voice == "*bedroom lights off")
            {
                digitalWrite(led4, LOW);
            } else if (voice == "*bathroom lights off")
            {
                digitalWrite(led5, LOW);
            }
            voice = "";
        }
    } //Reset the variable after initiating

Explanation

• We can control the LEDs by the voice, through the Android app
• If we want to turn ON the light, we set the voice as the "Light ON"
• If we want to turn OFF the light, we set the voice as the "Light OFF"
• We can also set the voice for "All on" and "All Off".
• They can work on a one-by-one process.
• We want to download the app from the play store.

Output