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

//Biblioteca
//https://github.com/nkolban/ESP32_BLE_Arduino.git

String valor;
String pot_s;
int pot_i;
int led = 2; 
int pot=35;


#define SERVICE_UUID        "da7c1fa0-27c2-46ec-989f-0181e6b32f13"
#define CHARACTERISTIC_UUID "93b50cbe-ce56-4ac4-8d2f-433c37df1581"

class MyCallbacks: public BLECharacteristicCallbacks {
    void onWrite(BLECharacteristic *pCharacteristic) {
      std::string value = pCharacteristic->getValue();
     
    if (value.length() > 0) {
        valor = "";
        for (int i = 0; i < value.length(); i++){
          // Serial.print(value[i]); 
          valor = valor + value[i];
        }

        Serial.println("*********");
        Serial.print("valor = ");
        Serial.println(valor); 
        if(valor == "pot") {            
          pCharacteristic->setValue(pot_s.c_str()); 
          }
        if(valor == "L") {
            digitalWrite(led, HIGH);
          pCharacteristic->setValue("Ligado"); 
          }          
        if(valor == "D") {
            digitalWrite(led, LOW);
          pCharacteristic->setValue("Desligado"); 
          }  
        if(valor == "ligar") {
            digitalWrite(led, HIGH);
           pCharacteristic->setValue("Ligado Texto");
          }
        if(valor == "desligar") {
          digitalWrite(led, LOW);
           pCharacteristic->setValue("Desligado Texto");
          }        
      }
    }
};

void setup() {
  Serial.begin(115200);
  pinMode(led, OUTPUT);
  BLEDevice::init("Aluno xxx"); //<-------- Mudar para seu nome
  BLEServer *pServer = BLEDevice::createServer();
  BLEService *pService = pServer->createService(SERVICE_UUID);
  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
                                         CHARACTERISTIC_UUID,
                                         BLECharacteristic::PROPERTY_READ |
                                         BLECharacteristic::PROPERTY_WRITE
                                       );

  pCharacteristic->setCallbacks(new MyCallbacks());
  pCharacteristic->setValue("Iniciado.");
  pService->start();

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

void loop() {
  delay(1000);
  pot_i=analogRead(pot);
  pot_s = (String) pot_i;    
 }