getLastBeatTime() about pulsesensorplayground

[biomurph]

@preksha02
I need more information to troubleshoot your problem.
What is your target hardware?
Show me your code, so I can see how you are implementing the function.

[preksha02]

#define USE_ARDUINO_INTERRUPTS true // Set-up low-level interrupts for most acurate BPM math.
#include <PulseSensorPlayground.h> // Includes the PulseSensorPlayground Library.

// Variables
const int PulseWire = A0; // PulseSensor PURPLE WIRE connected to ANALOG PIN 0
const int LED13 = 13; // The on-board Arduino LED, close to PIN 13.
int Threshold = 517 ; // Determine which Signal to "count as a beat" and which to ignore.
// Use the "Gettting Started Project" to fine-tune Threshold Value beyond default setting.
// Otherwise leave the default "550" value.

PulseSensorPlayground pulseSensor; // Creates an instance of the PulseSensorPlayground object called "pulseSensor"

int period = 1000;
unsigned long time_now = 0;
void setup() {

Serial.begin(9600); // For Serial Monitor

// Configure the PulseSensor object, by assigning our variables to it.
pulseSensor.analogInput(PulseWire);
pulseSensor.blinkOnPulse(LED13); //auto-magically blink Arduino's LED with heartbeat.
pulseSensor.setThreshold(Threshold);

// Double-check the "pulseSensor" object was created and "began" seeing a signal.
if (pulseSensor.begin()) {
Serial.println("We created a pulseSensor Object !"); //This prints one time at Arduino power-up, or on Arduino reset.
}
}

int i=0;
int a[700];
float beat=0.00;

void loop() {
time_now= millis();
int myBPM = pulseSensor.getBeatsPerMinute(); // Calls function on our pulseSensor object that returns BPM as an "int".
// "myBPM" hold this BPM value now.

if (pulseSensor.sawStartOfBeat()) { // Constantly test to see if "a beat happened".
Serial.println("A HeartBeat Happened ! "); // If test is "true", print a message "a heartbeat happened".
Serial.print("BPM: "); // Print phrase "BPM: "
Serial.println(myBPM); // Print the value inside of myBPM.
int Signal= analogRead(PulseWire);
Serial.println(Signal);
beat= (float)60.00/myBPM;
Serial.print("beat");
Serial.println(beat);
a[i]=Signal;
i++;
if (pulseSensor.sawNewSample()==true)
{
Serial.println("yes");
}
else
{
Serial.println("no");
}
int lastestBeatSample= pulseSensor.getLatestSample();
Serial.println(lastestBeatSample);
//long LB = pulseSensor.getLastBeatTime();
}
if (i==20)

{

Serial.println("hello");
for(i=0; i<20; i++)
{
Serial.println(a[i]);
}
// exit(0);

}

delay(20); // considered best practice in a simple sketch.

}

sir, i want to analyse the the single heart beat generated in serial plotter and want to study further about it thats why i want to use member function getLastBeatTime().
here in this code i use different different member functions , just to check how it is used.

[biomurph]

@preksha02
I still don't quite know what your issue is.
The getLastBeatTime function works for me.
One thing that I see is that you are creating an array int a[700]
700! that's a very large array. You may be using up too much memory and getting instability that way.

[preksha02]

my issue is when i apply pulseSensor.getLastBeatTime() , it shows an error- 'class PulseSensorPlayground' has no member named 'getLastBeatTime'.
IDK may be the library i downloaded doesnt work properly. BUt its not supporting in my program.
i used such a big array to store the values of of analogRead to perform some operations on it.

[biomurph]

I can compile your code against an Arduino UNO and I don't get any errors. Just a warning that memory is low due to the 700 member array.
Can you post the errors you are getting?