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	- Project: "Sensor Display"
	- Source Code NOT compiled for: Arduino Uno
	- Source Code created on: 2024-06-10 18:02:39

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Develop a heart rate and SpO2 monitoring system */
	/* using the MAX30100 sensor. The system should */
	/* initialize the sensor, read data continuously, and */
	/* display the results on a I2C oled display */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include 
#include   // https://github.com/gabriel-milan/Arduino-MAX30100
#include 
#include 

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t SENSOR_MAX30100_INT_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 LIBRARIES CLASS INSTANCES*****/
PulseOximeter pox;  // Create an instance of the PulseOximeter class
Adafruit_SSD1306 display(128, 64, &Wire);  // Create an instance of the OLED display class

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(SENSOR_MAX30100_INT_PIN_D2, INPUT_PULLUP);

    Serial.begin(115200);

    // Initialize the PulseOximeter
    if (!pox.begin()) {
        Serial.println("FAILED: Unable to initialize the PulseOximeter");
        for (;;);  // Halt the program
    } else {
        Serial.println("PulseOximeter initialized successfully");
    }

    // Set the IR LED current
    pox.setIRLedCurrent(MAX30100_LED_CURR_50MA);

    // Initialize the OLED display
    if (!display.begin(SSD1306_I2C_ADDRESS, SENSOR_MAX30100_I2C_PIN_SDA_A4, SENSOR_MAX30100_I2C_PIN_SCL_A5)) {
        Serial.println("SSD1306 allocation failed");
        for (;;);  // Halt the program
    }
    display.display();
    delay(2000);  // Pause for 2 seconds

    // Clear the buffer
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(0, 0);
    display.print("PulseOximeter initialized");
    display.display();
    delay(2000);  // Pause for 2 seconds
}

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

    // Get the heart rate and SpO2 values
    float heartRate = pox.getHeartRate();
    uint8_t spO2 = pox.getSpO2();

    // Print the heart rate and SpO2 values to the Serial Monitor
    Serial.print("Heart rate: ");
    Serial.print(heartRate);
    Serial.print(" bpm / SpO2: ");
    Serial.print(spO2);
    Serial.println(" %");

    // Display the heart rate and SpO2 values on the OLED display
    display.clearDisplay();
    display.setCursor(0, 0);
    display.print("Heart rate: ");
    display.print(heartRate);
    display.print(" bpm");
    display.setCursor(0, 16);
    display.print("SpO2: ");
    display.print(spO2);
    display.print(" %");
    display.display();

    delay(1000);  // Wait for 1 second before the next update
}

/* END CODE */