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	- Project: Sensor Monitoring
	- Source Code compiled for: Arduino Uno
	- Source Code created on: 2023-12-20 01:15:25

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* if distance is less than 20cm so read heart rate. */
	/* If heart rate is above 100bpm so print on serial */
	/* "HUMAN STRESSED". */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Arduino.h>
#include <Wire.h>
#include <Ultrasonic.h>
#include <MAX30100_PulseOximeter.h>

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t frontSensor_HC_SR04_Echo_PIN_D4 = 4;
const uint8_t sensor_MAX30100_INT_PIN_D5 = 5;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t alarm_ActiveBuzzer_output_PIN_D2 = 2;
const uint8_t frontSensor_HC_SR04_Trigger_PIN_D3 = 3;

/***** DEFINITION OF I2C PINS *****/
const uint8_t sensor_MAX30100_I2C_PIN_SDA_A4 = A4;
const uint8_t sensor_MAX30100_I2C_PIN_SCL_A5 = A5;
const uint8_t sensor_MAX30100_I2C_SLAVE_ADDRESS = 0x57; // Replace with the correct slave address

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
Ultrasonic ultrasonic(frontSensor_HC_SR04_Trigger_PIN_D3, frontSensor_HC_SR04_Echo_PIN_D4);
PulseOximeter pulseOximeter;

void setup(void)
{
  // put your setup code here, to run once:

  pinMode(frontSensor_HC_SR04_Echo_PIN_D4, INPUT);
  pinMode(sensor_MAX30100_INT_PIN_D5, INPUT_PULLUP);

  pinMode(alarm_ActiveBuzzer_output_PIN_D2, OUTPUT);
  pinMode(frontSensor_HC_SR04_Trigger_PIN_D3, OUTPUT);

  // Initialize the MAX30100 sensor
  Wire.begin();
  pulseOximeter.begin();
}

void loop(void)
{
  // put your main code here, to run repeatedly:
  
  // Read the distance from the ultrasonic sensor
  unsigned int distance = ultrasonic.read();

  // Check if the distance is less than 20cm
  if (distance < 20) {
    // Read the heart rate from the MAX30100 sensor
    pulseOximeter.update();
    float heartRate = pulseOximeter.getHeartRate();

    // Check if the heart rate is above 100bpm
    if (heartRate > 100) {
      Serial.println("HUMAN STRESSED");
    }
  }
}