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	- Project: **Sensor Monitor**
	- Source Code NOT compiled for: Arduino Nano ESP32
	- Source Code created on: 2024-10-03 14:19:16

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Initialize internal Bluetooth device as master, */
	/* receive BLE data, and show it on a 16x2 LCD using */
	/* LiquidCrystal library for Arduino. */
/****** SYSTEM REQUIREMENT 2 *****/
	/* read temperature and send it via bluetooth. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <LiquidCrystal.h>   // https://github.com/arduino-libraries/LiquidCrystal
#include <DS18B20.h>         // https://github.com/matmunk/DS18B20
#include <DHT.h>             // https://github.com/adafruit/DHT-sensor-library
#include <BluetoothSerial.h> // Include Bluetooth library

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t temp_DS18B20_DQ_PIN_D8 = 8; // DS18B20 data pin
const uint8_t temperatureSensor_DHT22_DOUT_PIN_D9 = 9; // DHT22 data pin

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t display_LCD1602_RS_PIN_D2 = 2; // LCD RS pin
const uint8_t display_LCD1602_E_PIN_D3 = 3; // LCD Enable pin
const uint8_t display_LCD1602_D4_PIN_D4 = 4; // LCD D4 pin
const uint8_t display_LCD1602_D5_PIN_D5 = 5; // LCD D5 pin
const uint8_t display_LCD1602_D6_PIN_D6 = 6; // LCD D6 pin
const uint8_t display_LCD1602_D7_PIN_D7 = 7; // LCD D7 pin

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
bool display_LCD1602_RS_PIN_D2_rawData = 0;
bool display_LCD1602_E_PIN_D3_rawData = 0;
bool display_LCD1602_D4_PIN_D4_rawData = 0;
bool display_LCD1602_D5_PIN_D5_rawData = 0;
bool display_LCD1602_D6_PIN_D6_rawData = 0;
bool display_LCD1602_D7_PIN_D7_rawData = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
float display_LCD1602_RS_PIN_D2_phyData = 0.0;
float display_LCD1602_E_PIN_D3_phyData = 0.0;
float display_LCD1602_D4_PIN_D4_phyData = 0.0;
float display_LCD1602_D5_PIN_D5_phyData = 0.0;
float display_LCD1602_D6_PIN_D6_phyData = 0.0;
float display_LCD1602_D7_PIN_D7_phyData = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Initialize the LiquidCrystal object
LiquidCrystal lcd(display_LCD1602_RS_PIN_D2, display_LCD1602_E_PIN_D3,
                  display_LCD1602_D4_PIN_D4, display_LCD1602_D5_PIN_D5,
                  display_LCD1602_D6_PIN_D6, display_LCD1602_D7_PIN_D7);

// Initialize the DHT sensor
DHT dht(temperatureSensor_DHT22_DOUT_PIN_D9, DHT22);

// Initialize Bluetooth Serial
BluetoothSerial SerialBT;

void setup(void)
{
    // Initialize the LCD
    lcd.begin(16, 2);
    lcd.clear();

    // Initialize the DHT sensor
    dht.begin();

    // Initialize Bluetooth
    SerialBT.begin("ESP32_Bluetooth"); // Bluetooth device name

    // Set pin modes
    pinMode(temp_DS18B20_DQ_PIN_D8, INPUT);
}

void loop(void)
{
    // Update outputs
    updateOutputs();

    // Read temperature and send via Bluetooth
    readTemperatureAndSend();

    delay(2000); // Delay for stability
}

void updateOutputs()
{
    // Update LCD display with raw data
    lcd.setCursor(0, 0);
    lcd.print("LCD Data:");
    lcd.setCursor(0, 1);
    lcd.print("Temperature: ");
}

void readTemperatureAndSend()
{
    // Read temperature from DHT sensor
    float temperature = dht.readTemperature(); // Read temperature as Celsius

    // Check if the reading is valid
    if (isnan(temperature)) {
        lcd.print("Err");
        SerialBT.println("Failed to read temperature");
    } else {
        lcd.print(temperature);
        SerialBT.print("Temperature: ");
        SerialBT.println(temperature);
    }
}

/* END CODE */