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	- Project: "Stress Detection"
	- Source Code compiled for: Arduino Uno
	- Source Code created on: 2024-01-18 22:35:39

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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 
#include 

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

/***** 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 = 87;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool alarm_ActiveBuzzer_output_PIN_D2_rawData = 0;
bool frontSensor_HC_SR04_Trigger_PIN_D3_rawData = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float alarm_ActiveBuzzer_output_PIN_D2_phyData = 0.0;
float frontSensor_HC_SR04_Trigger_PIN_D3_phyData = 0.0;

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

void setup()
{
    // 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);
}

void loop()
{
    // put your main code here, to run repeatedly:
    updateOutputs(); // Refresh output data

    // Reading ultrasonic sensor distance
    int distance = ultrasonic.read();

    // Check if distance is less than 20cm
    if (distance < 20)
    {
        // Read heart rate (assuming it's stored in a variable named 'heartRate')
        int heartRate = readHeartRate(); // Replace with the actual code to read heart rate

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

void updateOutputs()
{
    digitalWrite(alarm_ActiveBuzzer_output_PIN_D2, alarm_ActiveBuzzer_output_PIN_D2_rawData);
    digitalWrite(frontSensor_HC_SR04_Trigger_PIN_D3, frontSensor_HC_SR04_Trigger_PIN_D3_rawData);
}

int readHeartRate()
{
    // Replace with the actual code to read the heart rate
    // Example: int heartRate = analogRead(A0);
    int heartRate = analogRead(A0); // Replace with the actual code to read heart rate
    return heartRate;
}