#include "BluetoothSerial.h"

BluetoothSerial SerialBT;

void setup() {
  Serial.begin(115200);
  SerialBT.begin("ESP32-BT-SlaveOJS"); // 블루투스 장치 이름 설정
  Serial.println("Bluetooth Started! Pair with ESP32-BT-Slave");
}

void loop() {
  if (Serial.available()) {
    char incoming = Serial.read();
    SerialBT.write(incoming); // 시리얼 데이터를 블루투스로 전송
  }
  if (SerialBT.available()) {
    char incoming = SerialBT.read();
    Serial.write(incoming); // 블루투스 데이터를 시리얼로 출력
  }
}

#include "BluetoothSerial.h"

BluetoothSerial SerialBT;

const int ledPin = 22; // LED가 연결된 핀 번호

void setup() {
  Serial.begin(115200);
  SerialBT.begin("ESP32-BT-LED"); // 블루투스 장치 이름 설정
  Serial.println("Bluetooth Started! Pair with ESP32-BT-LED");

  pinMode(ledPin, OUTPUT); // LED 핀을 출력으로 설정
  digitalWrite(ledPin, LOW); // 초기 상태를 OFF로 설정
}

void loop() {
  if (SerialBT.available()) {
    char incoming = SerialBT.read();
    Serial.write(incoming); // 수신된 데이터를 시리얼 모니터에 출력

    if (incoming == '1') {
      digitalWrite(ledPin, HIGH); // '1'을 수신하면 LED ON
      Serial.println("LED ON");
    } else if (incoming == '0') {
      digitalWrite(ledPin, LOW); // '0'을 수신하면 LED OFF
      Serial.println("LED OFF");
    }
  }
}

#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define RGB_CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
#define NOTYFY_CHARACTERISTIC_UUID "d501d731-f0f9-4121-a7f6-2c0f959f1583"
#define RED_PIN   4
#define GREEN_PIN 15
#define BLUE_PIN  2
BLEServer *pServer; //BLE 서버 객체
BLEService *pService; // BLE 서비스 객체
BLECharacteristic *pRGBCharacteristic = NULL; //BLE 특성 객체
BLECharacteristic* pCharacteristic = NULL; //BLE 특성 객체
int redValue = 0;
int greenValue = 0;
int blueValue = 0;
class MyCallbacks : public BLECharacteristicCallbacks {
  void onWrite(BLECharacteristic *pCharacteristic) {
    String value = pCharacteristic->getValue().c_str(); //특성의 값을 문자열로 읽어옵니다.

    if (value.length() > 0) {
      int delimiterPos1 = value.indexOf(',');
      int delimiterPos2 = value.lastIndexOf(',');

      if (delimiterPos1 != -1 && delimiterPos2 != -1 \
             && delimiterPos2 < value.length() - 1) {
        redValue = value.substring(0, delimiterPos1).toInt();
        greenValue = value.substring(delimiterPos1 + 1, delimiterPos2).toInt();
        blueValue = value.substring(delimiterPos2 + 1).toInt();

        analogWrite(RED_PIN, 255 - redValue);
        analogWrite(GREEN_PIN, 255 - greenValue);
        analogWrite(BLUE_PIN, 255 - blueValue);
      }
    }
  }
};

void setup() {
  BLEDevice::init("RGB LED Control");
  pServer = BLEDevice::createServer();
  pService = pServer->createService(SERVICE_UUID);
  
  pRGBCharacteristic = pService->createCharacteristic(
    RGB_CHARACTERISTIC_UUID,
    BLECharacteristic::PROPERTY_WRITE
  );  
  pRGBCharacteristic->setCallbacks(new MyCallbacks());

  pCharacteristic = pService->createCharacteristic(
                      NOTYFY_CHARACTERISTIC_UUID,
                      BLECharacteristic::PROPERTY_NOTIFY |
                      BLECharacteristic::PROPERTY_INDICATE
                    );
  pCharacteristic->addDescriptor(new BLE2902());

  pService->start();

  BLEAdvertising *pAdvertising = pServer->getAdvertising();
  pAdvertising->start();

  digitalWrite(RED_PIN, HIGH);
  digitalWrite(GREEN_PIN, HIGH);
  digitalWrite(BLUE_PIN, HIGH);
}

void loop() {
  char hexValue[8]; 
  sprintf(hexValue, "#%02X%02X%02X", redValue, greenValue, blueValue);
  pCharacteristic->setValue(hexValue); 
  pCharacteristic->notify(); //Notify를 통해 값을 전달합니다.

  delay(100);  // 알림 간격을 조절할 수 있습니다.
}