"Proximity Detection" rev_01

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    - Project: "Proximity Detection"
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2025-04-25 23:29:35

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Utilizes an HC-SR04 ultrasonic sensor to sense */
    /* pedestrian proximity, generating a signal for */
    /* system activation. Aims for precise detection and */
    /* reliable performance in smart traffic management */
    /* systems. the traffic light will turn red */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <Ultrasonic.h> //https://github.com/ErickSimoes/Ultrasonic

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t pedestriansensor_HC-SR04_Echo_PIN_D3      = 3;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t pedestriansensor_HC-SR04_Trigger_PIN_D2       = 2;
const uint8_t myLED_LED_PIN_D4      = 4;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool    pedestriansensor_HC-SR04_Trigger_PIN_D2_rawData     = 0;
bool    myLED_LED_PIN_D4_rawData        = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float   pedestriansensor_HC-SR04_Trigger_PIN_D2_phyData     = 0.0;
float   myLED_LED_PIN_D4_phyData        = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create an instance of the Ultrasonic class
Ultrasonic ultrasonic(pedestriansensor_HC-SR04_Trigger_PIN_D2, pedestriansensor_HC-SR04_Echo_PIN_D3);

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

    pinMode(pedestriansensor_HC-SR04_Echo_PIN_D3, INPUT);
    pinMode(pedestriansensor_HC-SR04_Trigger_PIN_D2, OUTPUT);
    pinMode(myLED_LED_PIN_D4, OUTPUT);
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    checkProximity(); // Check for pedestrian proximity
    updateOutputs(); // Refresh output data
}

void checkProximity()
{
    // Read distance from the ultrasonic sensor
    pedestriansensor_HC-SR04_Trigger_PIN_D2_phyData = ultrasonic.read();

    // Check if the distance is below a certain threshold (e.g., 50 cm)
    if (pedestriansensor_HC-SR04_Trigger_PIN_D2_phyData < 50) {
        myLED_LED_PIN_D4_rawData = HIGH; // Turn on the LED (traffic light turns red)
    } else {
        myLED_LED_PIN_D4_rawData = LOW; // Turn off the LED
    }
}

void updateOutputs()
{
    digitalWrite(pedestriansensor_HC-SR04_Trigger_PIN_D2, pedestriansensor_HC-SR04_Trigger_PIN_D2_rawData);
    digitalWrite(myLED_LED_PIN_D4, myLED_LED_PIN_D4_rawData);
}

/* END CODE */