#include <Wire.h>
#include "MAX30100_PulseOximeter.h"

#define REPORTING_PERIOD_MS     1000


PulseOximeter pox;

uint32_t tsLastReport = 0;
int Buzzer =4;
int LED = 26;

void onBeatDetected()
{
  Serial.println("Beat!");
}

void setup()
{
  Serial.begin(115200);
   Wire.begin();
    pinMode(Buzzer, OUTPUT);
    pinMode(LED, OUTPUT);
  Serial.print("Initializing pulse oximeter..");

  if (!pox.begin()) {
    Serial.println("FAILED");
    for (;;);
  } else {
    Serial.println("SUCCESS");
  }

  pox.setOnBeatDetectedCallback(onBeatDetected);
}

void loop()
{
  pox.update();
  if (millis() - tsLastReport > REPORTING_PERIOD_MS)
  {
    Serial.print("Heart rate:");
    Serial.print(pox.getHeartRate());
    Serial.print("bpm / O2:");
    Serial.print(pox.getSpO2());
    Serial.println("%");
    if (pox.getSpO2() == 0)
  {
    digitalWrite(Buzzer, LOW);
    digitalWrite(LED, LOW);
  }
  else  if (pox.getSpO2() >= 95)
  {
    digitalWrite(Buzzer, LOW);
    digitalWrite(LED, LOW);

  }
  else if (pox.getSpO2() < 95 && pox.getSpO2() > 0)
  {
    digitalWrite(Buzzer, HIGH);
    digitalWrite(LED, HIGH);
  }
  tsLastReport = millis();
  }
}