**BLE Server** rev_02

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    - Project: **BLE Server**
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-03-28 03:13:13

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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. */
/****** SYSTEM REQUIREMENT 2 *****/
    /* Write a Code for esp32-C3 in arduino IDE that */
    /* always is on deep sleep. Increment a value every 3 */
    /* seconds and transmit the value by bluetooth using */
    /* Nimble library and the same data will transmitted */
    /* by espnow every 9 seconds. */
/****** 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;
const uint8_t myDHT11_DHT11_DOUT_PIN_D13 = 13;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// BLE variables
NimBLEServer* pServer = nullptr;
NimBLECharacteristic* pCharacteristic = nullptr;
uint32_t valueToSend = 0; // Value to be incremented and sent

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

    // Initialize BLE
    NimBLEDevice::init("ESP32-C3");

    // Create BLE Server
    pServer = NimBLEDevice::createServer();
    pCharacteristic = pServer->createCharacteristic(
        "12345678-1234-5678-1234-56789abcdef0", // UUID
        NIMBLE_PROPERTY::NOTIFY | NIMBLE_PROPERTY::READ
    );

    // Set pin modes
    pinMode(myDHT22_DHT22_DOUT_PIN_D4, INPUT_PULLUP);
    pinMode(myDHT11_DHT11_DOUT_PIN_D13, INPUT_PULLUP);

    // Start advertising
    pServer->getAdvertising()->start();
    Serial.println("BLE Server is advertising");
}

/****** LOOP FUNCTION *****/
void loop(void)
{
    // Increment the value every 3 seconds
    delay(3000);
    valueToSend++;
    Serial.print("Value to send: ");
    Serial.println(valueToSend);

    // Update the characteristic with the new value
    pCharacteristic->setValue(valueToSend);
    pCharacteristic->notify();

    // Deep sleep for 9 seconds
    Serial.println("Going to deep sleep for 9 seconds");
    esp_sleep_enable_timer_wakeup(9000000); // 9 seconds in microseconds
    esp_deep_sleep_start();
}

/* END CODE */