How to connect pulsesensor and gsm shield

Using Arduino Programming Questions
1

Good morning.

I'm new in this forum and i have a question. I have to do project pulsesensor with GSM shield on Arduino Uno. When someone haven't pulse it should send SMS. I connected it from phisical site and now i have a trouble with a code.
Already i found this:

#define PROCESSING_VISUALIZER 1
#define SERIAL_PLOTTER 2

// Variables
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.

// SET THE SERIAL OUTPUT TYPE TO YOUR NEEDS
// PROCESSING_VISUALIZER works with Pulse Sensor Processing Visualizer
// GitHub - WorldFamousElectronics/PulseSensor_Amped_Processing_Visualizer: Processing code for pulse wave visualization
// SERIAL_PLOTTER outputs sensor data for viewing with the Arduino Serial Plotter
// run the Serial Plotter at 115200 baud: Tools/Serial Plotter or Command+L
static int outputType = SERIAL_PLOTTER;

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
// IF YOU ARE POWERING The Pulse Sensor AT VOLTAGE LESS THAN THE BOARD VOLTAGE,
// UN-COMMENT THE NEXT LINE AND APPLY THAT VOLTAGE TO THE A-REF PIN
// analogReference(EXTERNAL);
}

// 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
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
}

ledFadeToBeat(); // Makes the LED Fade Effect Happen
delay(20); // take a break
}

void ledFadeToBeat(){
fadeRate -= 15; // set LED fade value
fadeRate = constrain(fadeRate,0,255); // keep LED fade value from going into negative numbers!
analogWrite(fadePin,fadeRate); // fade LED
}

Source and full code: GitHub - WorldFamousElectronics/PulseSensor_Amped_Arduino: PulseSensor Arduino code for BPM and Processing-Visualizer

And now how to send sms if someone haven't pulse? I have to do this until 10 pm. Please help me

PS. Sorry for my english

2

And now how to send sms if someone haven't pulse?

What defines, based on that code, "no pulse"? It would mean that the Arduino was running for some period of time without seeing a pulse (that is, without QS being true), wouldn't it?

What period of time is reasonable to define "no pulse"?

Where are the functions serialOutput() and serialOutputWhenBeatHappens()?

3

//////////
///////// All Serial Handling Code,
///////// It's Changeable with the 'outputType' variable
///////// It's declared at start of code.
/////////

void serialOutput(){ // Decide How To Output Serial.
switch(outputType){
case PROCESSING_VISUALIZER:
sendDataToSerial('S', Signal); // goes to sendDataToSerial function
break;
case SERIAL_PLOTTER: // open the Arduino Serial Plotter to visualize these data
// Serial.print(BPM);
//Serial.print(",");
//Serial.print(IBI);
//Serial.print(",");
Serial.println(Signal);
break;
default:
break;
}

}

// Decides How To OutPut BPM and IBI Data
void serialOutputWhenBeatHappens(){
switch(outputType){
case PROCESSING_VISUALIZER: // find it here GitHub - WorldFamousElectronics/PulseSensor_Amped_Processing_Visualizer: Processing code for pulse wave visualization
sendDataToSerial('B',BPM); // send heart rate with a 'B' prefix
sendDataToSerial('Q',IBI); // send time between beats with a 'Q' prefix
break;

default:
break;
}
}

// Sends Data to Pulse Sensor Processing App, Native Mac App, or Third-party Serial Readers.
void sendDataToSerial(char symbol, int data ){
Serial.print(symbol);
Serial.println(data);
}

Next part:

volatile int rate[10]; // array to hold last ten IBI values
volatile unsigned long sampleCounter = 0; // used to determine pulse timing
volatile unsigned long lastBeatTime = 0; // used to find IBI
volatile int P =512; // used to find peak in pulse wave, seeded
volatile int T = 512; // used to find trough in pulse wave, seeded
volatile int thresh = 530; // used to find instant moment of heart beat, seeded
volatile int amp = 0; // used to hold amplitude of pulse waveform, seeded
volatile boolean firstBeat = true; // used to seed rate array so we startup with reasonable BPM
volatile boolean secondBeat = false; // used to seed rate array so we startup with reasonable BPM

void interruptSetup(){ // CHECK OUT THE Timer_Interrupt_Notes TAB FOR MORE ON INTERRUPTS
// Initializes Timer2 to throw an interrupt every 2mS.
TCCR2A = 0x02; // DISABLE PWM ON DIGITAL PINS 3 AND 11, AND GO INTO CTC MODE
TCCR2B = 0x06; // DON'T FORCE COMPARE, 256 PRESCALER
OCR2A = 0X7C; // SET THE TOP OF THE COUNT TO 124 FOR 500Hz SAMPLE RATE
TIMSK2 = 0x02; // ENABLE INTERRUPT ON MATCH BETWEEN TIMER2 AND OCR2A
sei(); // MAKE SURE GLOBAL INTERRUPTS ARE ENABLED
}

// THIS IS THE TIMER 2 INTERRUPT SERVICE ROUTINE.
// Timer 2 makes sure that we take a reading every 2 miliseconds
ISR(TIMER2_COMPA_vect){ // triggered when Timer2 counts to 124
cli(); // disable interrupts while we do this
Signal = analogRead(pulsePin); // read the Pulse Sensor
sampleCounter += 2; // keep track of the time in mS with this variable
int N = sampleCounter - lastBeatTime; // monitor the time since the last beat to avoid noise

// find the peak and trough of the pulse wave
if(Signal < thresh && N > (IBI/5)*3){ // avoid dichrotic noise by waiting 3/5 of last IBI
if (Signal < T){ // T is the trough
T = Signal; // keep track of lowest point in pulse wave
}
}

if(Signal > thresh && Signal > P){ // thresh condition helps avoid noise
P = Signal; // P is the peak
} // keep track of highest point in pulse wave

// NOW IT'S TIME TO LOOK FOR THE HEART BEAT
// signal surges up in value every time there is a pulse
if (N > 250){ // avoid high frequency noise
if ( (Signal > thresh) && (Pulse == false) && (N > (IBI/5)*3) ){
Pulse = true; // set the Pulse flag when we think there is a pulse
digitalWrite(blinkPin,HIGH); // turn on pin 13 LED
IBI = sampleCounter - lastBeatTime; // measure time between beats in mS
lastBeatTime = sampleCounter; // keep track of time for next pulse

if(secondBeat){ // if this is the second beat, if secondBeat == TRUE
secondBeat = false; // clear secondBeat flag
for(int i=0; i<=9; i++){ // seed the running total to get a realisitic BPM at startup
rate = IBI;

  • }*
  • }*
  • if(firstBeat){ // if it's the first time we found a beat, if firstBeat == TRUE*
  • firstBeat = false; // clear firstBeat flag*
  • secondBeat = true; // set the second beat flag*
  • sei(); // enable interrupts again*
  • return; // IBI value is unreliable so discard it*
  • }*
  • // keep a running total of the last 10 IBI values*
  • word runningTotal = 0; // clear the runningTotal variable*
  • for(int i=0; i<=8; i++){ // shift data in the rate array*
    _ rate = rate[i+1]; // and drop the oldest IBI value_
    _ runningTotal += rate*; // add up the 9 oldest IBI values*
    * }
     rate[9] = IBI; // add the latest IBI to the rate array*
    * runningTotal += rate[9]; // add the latest IBI to runningTotal*
    * runningTotal /= 10; // average the last 10 IBI values*
    * BPM = 60000/runningTotal; // how many beats can fit into a minute? that's BPM!
     QS = true; // set Quantified Self flag*
    * // QS FLAG IS NOT CLEARED INSIDE THIS ISR*
    * }
     }
     if (Signal < thresh && Pulse == true){ // when the values are going down, the beat is over*
    * digitalWrite(blinkPin,LOW); // turn off pin 13 LED*
    * Pulse = false; // reset the Pulse flag so we can do it again*
    * amp = P - T; // get amplitude of the pulse wave*
    * thresh = amp/2 + T; // set thresh at 50% of the amplitude*
    * P = thresh; // reset these for next time*
    * T = thresh;
     }
     if (N > 2500){ // if 2.5 seconds go by without a beat*
    * thresh = 530; // set thresh default*
    * P = 512; // set P default*
    * T = 512; // set T default*
    * lastBeatTime = sampleCounter; // bring the lastBeatTime up to date*
    * firstBeat = true; // set these to avoid noise*
    * secondBeat = false; // when we get the heartbeat back*
    * }
     sei(); // enable interrupts when youre done!
    }// end isr*
    Arduino should send sms after 5 sec without seeing a pulse_
4

Arduino should send sms after 5 sec without seeing a pulse

So, where do you record when a pulse happens?

Where do you compare now to then, and decide that the person died?

What good will it do to send a text message to a dead person?

5

It will send message to family that something bad happens. It's like a heart pulse alarm system for older people

6

Hello,
can i know the details of the libraries included:-
#define PROCESSING_VISUALIZER 1
&
#define SERIAL_PLOTTER 2

and what are these number "1" & "2" ?

7

hi Ebi09

I also work on the same project.I have found a easy way to do it!

you can insert the sms sent code on the serialOutputWhenBeatHappens function like this:

void serialOutput(){   // Decide How To Output Serial.
  switch(outputType){
    case PROCESSING_VISUALIZER:
      sendDataToSerial('S', Signal);     // goes to sendDataToSerial function
      break;
    case SERIAL_PLOTTER:  // open the Arduino Serial Plotter to visualize these data
   Serial.print("BPM ");
    Serial.print(BPM);
      Serial.print(",");
       Serial.print("IBI ");
    Serial.print(IBI);
      Serial.print(",");
       Serial.print("signal ");
    Serial.println(Signal);

    
   if( BPM>50 and BPM<100){ //verifie the right value of BPM for sent sms.it just an example
    sprintf(msg, "%d_%d_%d", BPM,IBI,Signal); //take the value of BPM,IBI,SIgnal and store into
   
      if (!fona.sendSMS("phonenumber", msg)) { //check if it's ready to sent an sms and sent it
          
          Serial.println(F("Failed"));
          
           
        } else {
          Serial.println(F("Sent!"));
         
       
        }
    
   }
   
   BPM=0; //reset the BPM value to recalculate the BPM before trying to sent it again or not
        
      break;
    default:
      break;
  }