You have the pulse sensor, you have the code, you have a pulse, I assume, so why not test it instead of asking us?
Unfortunately i don't have the sensor yet. I just couldn't make sense of things in my head quite yet.
Here's a link to the product website https://pulsesensor.com/
I couldn't find a data sheet but here's a schematic (hope that helps) Schematic
Here's an example sketch from the PulseSensor Library. It does mention the Threshold as you mentioned.
int PulseSensorPurplePin = 0; // Pulse Sensor PURPLE WIRE connected to ANALOG PIN 0
int LED13 = 13; // The on-board Arduion LED
int Signal; // holds the incoming raw data. Signal value can range from 0-1024
int Threshold = 550; // Determine which Signal to "count as a beat", and which to ingore.
// The SetUp Function:
void setup() {
pinMode(LED13,OUTPUT); // pin that will blink to your heartbeat!
Serial.begin(9600); // Set's up Serial Communication at certain speed.
}
// The Main Loop Function
void loop() {
Signal = analogRead(PulseSensorPurplePin); // Read the PulseSensor's value.
// Assign this value to the "Signal" variable.
Serial.println(Signal); // Send the Signal value to Serial Plotter.
if(Signal > Threshold){ // If the signal is above "550", then "turn-on" Arduino's on-Board LED.
digitalWrite(LED13,HIGH);
} else {
digitalWrite(LED13,LOW); // Else, the sigal must be below "550", so "turn-off" this LED.
}
delay(10);
}