Bluetooth Temperature rev_07

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    - Project: Bluetooth Temperature
    - Source Code NOT compiled for: Arduino Nano ESP32
    - Source Code created on: 2024-10-02 21:08:33

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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 <Adafruit_SSD1306.h>   //https://github.com/stblassitude/Adafruit_SSD1306_Wemos_OLED.git
#include <U8g2_for_Adafruit_GFX.h>  //https://github.com/olikraus/U8g2_for_Adafruit_GFX
#include <DHT.h>    //https://github.com/adafruit/DHT-sensor-library
#include <BluetoothSerial.h> // Include BluetoothSerial library

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t temp_DS18B20_DQ_PIN_D8 = 8;
const uint8_t temperatureSensor_DHT22_DOUT_PIN_D9 = 9;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t display_LCD1602_RS_PIN_D2 = 2;
const uint8_t display_LCD1602_E_PIN_D3 = 3;
const uint8_t display_LCD1602_D4_PIN_D4 = 4;
const uint8_t display_LCD1602_D5_PIN_D5 = 5;
const uint8_t display_LCD1602_D6_PIN_D6 = 6;
const uint8_t display_LCD1602_D7_PIN_D7 = 7;

/***** DEFINITION OF I2C PINS *****/
const uint8_t myOledDisplay_SSD1306OledDisplay_I2C_PIN_SDA_A4 = A4;
const uint8_t myOledDisplay_SSD1306OledDisplay_I2C_PIN_SCL_A5 = A5;
const uint8_t myOledDisplay_SSD1306OledDisplay_I2C_SLAVE_ADDRESS = 60;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Initialize the LiquidCrystal object with the defined pins
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);
DS18B20 ds(temp_DS18B20_DQ_PIN_D8); // Initialize DS18B20 object with the defined pin

// Initialize the Adafruit SSD1306 object with the I2C address
Adafruit_SSD1306 display(myOledDisplay_SSD1306OledDisplay_I2C_SLAVE_ADDRESS, myOledDisplay_SSD1306OledDisplay_I2C_PIN_SDA_A4, myOledDisplay_SSD1306OledDisplay_I2C_PIN_SCL_A5);

// Initialize the U8g2_for_Adafruit_GFX object with the display object
U8G2_FOR_ADAFRUIT_GFX u8g2_for_adafruit_gfx;

// Initialize the DHT object with the defined pin and type
#define DHTTYPE DHT22
DHT dht(temperatureSensor_DHT22_DOUT_PIN_D9, DHTTYPE); // Initialize DHT object

// Initialize Bluetooth Serial
BluetoothSerial SerialBT;

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(temp_DS18B20_DQ_PIN_D8, INPUT);
    pinMode(temperatureSensor_DHT22_DOUT_PIN_D9, INPUT_PULLUP);

    pinMode(display_LCD1602_RS_PIN_D2, OUTPUT);
    pinMode(display_LCD1602_E_PIN_D3, OUTPUT);
    pinMode(display_LCD1602_D4_PIN_D4, OUTPUT);
    pinMode(display_LCD1602_D5_PIN_D5, OUTPUT);
    pinMode(display_LCD1602_D6_PIN_D6, OUTPUT);
    pinMode(display_LCD1602_D7_PIN_D7, OUTPUT);

    // Initialize the LCD
    lcd.begin(16, 2); // Set up the LCD's number of columns and rows
    lcd.print("Hello, World!"); // Print a message to the LCD

    // Initialize the OLED display
    display.begin(SSD1306_SWITCHCAPVCC, myOledDisplay_SSD1306OledDisplay_I2C_SLAVE_ADDRESS);
    display.clearDisplay(); // Clear the display buffer

    // Initialize U8g2_for_Adafruit_GFX with the display object
    u8g2_for_adafruit_gfx.begin(display);

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

    // Initialize Bluetooth
    SerialBT.begin("ESP32_Device"); // Name of the Bluetooth device
}

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

    // Read temperature and send it via Bluetooth
    float temperature = dht.readTemperature();
    if (!isnan(temperature)) {
        SerialBT.println("Temperature: " + String(temperature) + " °C");
        lcd.setCursor(0, 0);
        lcd.print("Temp: ");
        lcd.print(temperature);
        lcd.print(" C");
    } else {
        lcd.setCursor(0, 0);
        lcd.print("Temp: Err");
    }
    delay(2000); // Delay for 2 seconds before the next reading
}

void updateOutputs()
{
    // Update the output states based on the raw data
    digitalWrite(display_LCD1602_RS_PIN_D2, LOW); // Example value
    digitalWrite(display_LCD1602_E_PIN_D3, LOW); // Example value
    digitalWrite(display_LCD1602_D4_PIN_D4, LOW); // Example value
    digitalWrite(display_LCD1602_D5_PIN_D5, LOW); // Example value
    digitalWrite(display_LCD1602_D6_PIN_D6, LOW); // Example value
    digitalWrite(display_LCD1602_D7_PIN_D7, LOW); // Example value
}

/* END CODE */