**BLE Broadcast** rev_01

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    - Project: **BLE Broadcast**
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-03-28 03:07:53

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Implement a Bluetooth Low Energy (BLE) */
    /* communication system using NimBLEDevice to connect */
    /* and control connected components remotely. Ensure */
    /* seamless data transfer and device management for */
    /* enhanced user experience. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <NimBLEDevice.h>   //https://github.com/h2zero/NimBLE-Arduino
#include <DHT.h>    //https://github.com/adafruit/DHT-sensor-library

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

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t myDHT22_DHT22_DOUT_PIN_D4     = 4;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create a DHT object
DHT dht(myDHT22_DHT22_DOUT_PIN_D4, DHT22); // Assuming DHT22 sensor

// BLE server instance
NimBLEServer* pServer = nullptr;
NimBLECharacteristic* pCharacteristic = nullptr;

// Variable to hold the sensor data
float temperature;
float humidity;

// Callback for BLE connection
class MyServerCallbacks : public NimBLEServerCallbacks {
    void onConnect(NimBLEServer* pServer) {
        // Code to execute when a client connects
    }

    void onDisconnect(NimBLEServer* pServer) {
        // Code to execute when a client disconnects
    }
};

void setup(void)
{
    // Initialize Serial for debugging
    Serial.begin(115200);

    // Initialize DHT sensor
    dht.begin();

    // Initialize BLE
    NimBLEDevice::init("ESP32_BLE_Device"); // Set the BLE device name
    pServer = NimBLEDevice::createServer(); // Create the BLE Server
    pServer->setCallbacks(new MyServerCallbacks()); // Set server callbacks

    // Create a BLE Characteristic
    pCharacteristic = pServer->createCharacteristic(
        "Temperature_Humidity",
        NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::NOTIFY
    );

    // Start the server
    pServer->startAdvertising(); // Start advertising
    Serial.println("BLE Device is advertising...");
}

void loop(void)
{
    // Read temperature and humidity
    humidity = dht.readHumidity();
    temperature = dht.readTemperature();

    // Check if any reads failed and exit early (to try again).
    if (isnan(humidity) || isnan(temperature)) {
        Serial.println("Failed to read from DHT sensor!");
        return;
    }

    // Create a string to hold the sensor data
    String data = "Temp: " + String(temperature) + " C, Humidity: " + String(humidity) + " %";

    // Update the characteristic value
    pCharacteristic->setValue(data.c_str());
    pCharacteristic->notify(); // Notify clients of the new value

    // Print the values to the Serial Monitor
    Serial.println(data);

    // Wait a bit before the next loop
    delay(2000); // Adjust the delay as needed
}

/* END CODE */