Stress Detection rev_25

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    - Project: Stress Detection
    - Source Code compiled for: Arduino Nano
    - Source Code created on: 2023-12-20 01:56:21

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* if distance is lower than 50cm, so measure heart */
    /* rate and if this is above 100bpm, so print on */
    /* serial monitor "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_D3 = 3;
const uint8_t sensor_MAX30100_INT_PIN_D4 = 4;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t frontSensor_HC_SR04_Trigger_PIN_D2 = 2;

/***** DEFINITION OF I2C PINS *****/
const uint8_t sensor_MAX30100_I2C_PIN_SDA_A4 = A4;
const uint8_t sensor_MAX30100_I2C_PIN_SCL_A5 = A5;

/****** DEFINITION OF LIBRARY CLASS INSTANCES*****/
Ultrasonic frontSensor(frontSensor_HC_SR04_Trigger_PIN_D2, frontSensor_HC_SR04_Echo_PIN_D3);
PulseOximeter pulseOximeter;

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

  pinMode(frontSensor_HC_SR04_Echo_PIN_D3, INPUT);
  pinMode(sensor_MAX30100_INT_PIN_D4, INPUT_PULLUP);

  pinMode(frontSensor_HC_SR04_Trigger_PIN_D2, OUTPUT);

  // Initialize the MAX30100 Pulse Oximeter
  if (!pulseOximeter.begin()) {
    Serial.println("Failed to initialize MAX30100!");
    while (1);
  }
  else {
    Serial.println("MAX30100 initialized successfully!");
  }
}

void loop(void)
{
  // put your main code here, to run repeatedly:

  // Measure the distance using the ultrasonic sensor
  unsigned int distance = frontSensor.read();

  // Check if the distance is lower than 50cm
  if (distance < 50) {
    // Measure the heart rate using the MAX30100 Pulse Oximeter
    pulseOximeter.update();
    float heartRate = pulseOximeter.getHeartRate();

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

  // Delay for a short period before repeating the loop
  delay(1000);
}