Connecting Pulse Sensor With Android App Using Arduino Mega 2560

Introduction

• In this article, I will explain about connecting the Pulse Sensor with Android App with Arduino Mega2560.
• It can be used to give the correct information in the mobile App.

Parts of lists

• Arduino Mega 2560
• Pulse Sensor
• Bluetooth
• Hook Up wires
• Bread Boards 

Pulse Sensor

• It can be used to check the pulse of the body.
• It can be user friendly and can be used by students, artists and developers.
• It can be called the plug-play.
     
   Figure 1 : Pulse Sensor

Connection

Step 1 Connection from Pulse Sensor to Arduino Mega 2560

• They can commonly have three pins.
• The first pin can be connected to the gnd pin of the Arduino Mega 2560.
• The second pin can be connected to the vcc of the 5v of ArduinoMega 2560.
• The third can be connected to the vin of the Analog pin of the Ao of Arduino Mega 2560.

Step 2 Connection From Bluetooth to the Arduino Mega 2560

• Connect the vcc pin to the 5v of the Arduino Mega 2560.
• Connect the gnd pin to the gnd of the Arduino Mega 2560.
• Connect the Tx pin to the RX.
• Connect the RX pin to the TX.

Programming

int pulsePin = 0; // Pulse Sensor purple wire connected to analog pin 0
int blinkPin = 13; // pin to blink led at each beat
int fadePin = 5; // pin to do fancy classy fading blink at each beat
int fadeRate = 0; // used to fade LED on with PWM on fadePin

// Volatile Variables, used in the interrupt service routine!
volatile int BPM; // int that holds raw Analog in 0. updated every 2mS
volatile int Signal; // holds the incoming raw data
volatile int IBI = 600; // int that holds the time interval between beats! Must be seeded!
volatile boolean Pulse = false; // "True" when User's live heartbeat is detected. "False" when not a "live beat".
volatile boolean QS = false; // becomes true when Arduoino finds a beat.

// Regards Serial OutPut  -- Set This Up to your needs
static boolean serialVisual = true; // Set to 'false' by Default.  Re-set to 'true' to see Arduino Serial Monitor ASCII Visual Pulse


void setup()
{
    pinMode(blinkPin, OUTPUT); // pin that will blink to your heartbeat!
    pinMode(fadePin, OUTPUT); // pin that will fade to your heartbeat!
    Serial.begin(115200); // we agree to talk fast!
    interruptSetup(); // sets up to read Pulse Sensor signal every 2mS
    //   analogReference(EXTERNAL);
    Genotronex.begin(9600);
    Genotronex.println("Bluetooth On please press 1 or 0 blink LED ..");
    pinMode(ledpin, OUTPUT);
}


//  Where the Magic Happens
void loop()
{

    serialOutput();

    if (QS == true)
    { //  A Heartbeat Was Found
        // BPM and IBI have been Determined
        // Quantified Self "QS" true when arduino finds a heartbeat
        digitalWrite(blinkPin, HIGH); // Blink LED, we got a beat.
        fadeRate = 255; // Makes the LED Fade Effect Happen
        // Set 'fadeRate' Variable to 255 to fade LED with pulse
        serialOutputWhenBeatHappens(); // A Beat Happened, Output that to serial.
        QS = false; // reset the Quantified Self flag for next time
    } else
    {

        digitalWrite(blinkPin, LOW); // There is not beat, turn off pin 13 LED
    }

    ledFadeToBeat(); // Makes the LED Fade Effect Happen
    if (Genotronex.available())
    {
        BluetoothData = Genotronex.read();
        if (BluetoothData == '1')
        {
            // if number 1 pressed ....
            digitalWrite(ledpin, 1);
            Genotronex.println("LED  On D12 ON ! ");
        }
        if (BluetoothData == '0')
        {
            // if number 0 pressed ....
            digitalWrite(ledpin, 0);
            Genotronex.println("LED  On D12 Off ! ");
        }
    }
    delay(20); //  take a break
}

Explanation

• In this article, I clearly explained about the Pulse Sensor
• It can be clearly explained in the Bluetooth app.
• When the pulse is low, it cannot blink led
• When the pulse is high, it can blink led.