Pulse sensor + GSM call

Hello,

im having trouble with the pulse sensor with the sim800l gsm.
The propose is to call xxxxx number if the bpm <100, the value is just for tests.
The modules work alone fine, but when i put the two together i cant make it work.
A little help? thx.
Srry bad english.

Code:

#include <SoftwareSerial.h>

#define SIM800_TX_PIN 10

#define SIM800_RX_PIN 11

SoftwareSerial serialSIM800(SIM800_TX_PIN, SIM800_RX_PIN);

int pulsePin = 0;
// 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

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 = 525; // used to find instant moment of heart beat, seeded
volatile int amp = 100; // 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

char buffer[16];

void setup()
{
Serial.begin(115200);
while (!Serial);

serialSIM800.begin(4800);

interruptSetup();
}

void loop(){

serialOutput();

if (QS == true) // A Heartbeat Was Found
{

serialOutputWhenBeatHappens(); // A Beat Happened, Output that to serial.
QS = false; // reset the Quantified Self flag for next time
}

delay(20); // take a break
}

void interruptSetup()
{
// 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
}

void serialOutput()
{ // Decide How To Output Serial.
if (serialVisual == true)
{
arduinoSerialMonitorVisual(’-’, Signal); // goes to function that makes Serial Monitor Visualizer
}
else
{
sendDataToSerial(‘S’, Signal); // goes to sendDataToSerial function
}
}

void serialOutputWhenBeatHappens()
{
serialVisual == true; // Code to Make the Serial Monitor Visualizer Work

Serial.print("BPM: ");
Serial.println(BPM);

if( BPM<100){ //verifie the right value of BPM for sent sms.it just an example
//take the value of BPM
Serial.print(“TEST”);
//Set format to ASCII
serialSIM800.write(“AT+CMGF=1 \r\n”);
delay(100);

//Send new call command and message number
serialSIM800.write(“ATDxxxnumberherexxxx; \r\n”); <<
delay(10000);

}}

void arduinoSerialMonitorVisual(char symbol, int data )
{
const int sensorMin = 0; // sensor minimum, discovered through experiment
const int sensorMax = 1024; // sensor maximum, discovered through experiment
int sensorReading = data; // map the sensor range to a range of 12 options:
int range = map(sensorReading, sensorMin, sensorMax, 0, 11);
// do something different depending on the
// range value:

}

void sendDataToSerial(char symbol, int data )
{
Serial.print(symbol);
Serial.println(data);
}

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

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*_

* 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 = 512; // 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!*
}

Update The call worked, i just changed the ATD xxxxx to ATDL xxxxxx. Still dunno why this worked.