#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
#include <BLE2902.h>

// Define the UUIDs for service and characteristic
#define SERVICE_UUID        "6E400001-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_RX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E" 
#define CHARACTERISTIC_UUID_TX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E" 

// Declare the characteristic globally
BLECharacteristic *pCharacteristic;

void setup() {
  Serial.begin(115200);

  // Create the BLE Device
  BLEDevice::init("FizziQ"); // Set your BLE device name

  // Create the BLE Server
  BLEServer *pServer = BLEDevice::createServer();

  // Create the BLE Service
  BLEService *pService = pServer->createService(SERVICE_UUID);

//   Create a BLE Characteristic
  pCharacteristic = pService->createCharacteristic(
                    CHARACTERISTIC_UUID_TX,
                    BLECharacteristic::PROPERTY_WRITE |
                     BLECharacteristic::PROPERTY_NOTIFY
                  );

  pCharacteristic->addDescriptor(new BLE2902()); 

 // BLECharacteristic * pRxCharacteristic = pService->createCharacteristic(
 //                      CHARACTERISTIC_UUID_TX,
 //                     BLECharacteristic::PROPERTY_WRITE
 //                   );

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

  // Start advertising
  pServer->getAdvertising()->start();
  Serial.println("Waiting for a client connection...");
}

void loop() {
  // Send the temperature value every 5 seconds
  pCharacteristic->setValue("temperature : 20");
  pCharacteristic->notify(); // Send notification if connected
  delay(2000);
  pCharacteristic->setValue("temperature : 21");
  pCharacteristic->notify(); // Send notification if connected
  delay(2000);
}