Temperature Bluetooth rev_29

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    - Project: Temperature Bluetooth
    - Source Code NOT compiled for: Arduino Nano ESP32
    - Source Code created on: 2024-10-03 11:25:57

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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>    // LiquidCrystal library for controlling LCDs
#include <DS18B20.h>          // Library for DS18B20 temperature sensor
#include <DHT.h>              // Library for DHT temperature and humidity sensors
#include <BluetoothSerial.h>  // Library for Bluetooth communication

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs();
void readTemperatureAndSend(); // Function to read temperature and send via Bluetooth

/***** 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 LIBRARIES CLASS INSTANCES*****/
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 tempSensor(temp_DS18B20_DQ_PIN_D8);
DHT dht(temperatureSensor_DHT22_DOUT_PIN_D9, DHT22); // Assuming DHT22 sensor
BluetoothSerial bluetoothSerial; // Bluetooth Serial object

void setup(void)
{
    // Initialize the LCD
    lcd.begin(16, 2); // Set up the LCD's number of columns and rows
    lcd.print("Initializing...");

    // Initialize the temperature sensors
    tempSensor.begin();
    dht.begin();

    // Initialize Bluetooth
    bluetoothSerial.begin("ESP32_Bluetooth"); // Name of the Bluetooth device

    // Set pin modes
    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);
}

void loop(void)
{
    // Update outputs and read temperature
    updateOutputs();
    readTemperatureAndSend(); // Read temperature and send it via Bluetooth
    delay(2000); // Delay for readability
}

void updateOutputs()
{
    // Update the LCD display with a message
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("BLE Data:");
    // Here you would typically display received BLE data
}

void readTemperatureAndSend()
{
    // Read temperature from DS18B20
    float temperature = tempSensor.GetTemperature<float>();
    // Read humidity from DHT22
    float humidity = dht.readHumidity();

    // Display temperature and humidity on the LCD
    lcd.setCursor(0, 1);
    lcd.print("Temp: ");
    lcd.print(temperature);
    lcd.print("C");

    // Send temperature and humidity via Bluetooth
    bluetoothSerial.print("Temperature: ");
    bluetoothSerial.print(temperature);
    bluetoothSerial.print("C, Humidity: ");
    bluetoothSerial.print(humidity);
    bluetoothSerial.println("%");
}