#include <BLEDevice.h>
#include <BLEServer.h>

// Define the service UUID
#define SERVICE_UUID "4fafc201-1fb5-459e-8fcc-c5c9c331914b"

// Define the characteristic UUID
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"

void setup() {
    // Create a BLE server
    BLEServer *pServer = BLEDevice::createServer();

    // Create a BLE service
    BLEService *pService = pServer->createService(SERVICE_UUID);

    // Create a BLE characteristic
    BLECharacteristic *pCharacteristic = pService->createCharacteristic(
            CHARACTERISTIC_UUID, BLECharacteristic::PROPERTY_READ);

    // Set the characteristic value
    pCharacteristic->setValue("Hello, Bluetooth!");

    // Start the service
    pService->start();

    // Start advertising the service
    pServer->getAdvertising()->start();
}

void loop() {
    // Nothing to do here
}