//Biblioteca para habilitar a comunicação SERIAL
#include "BluetoothSerial.h"


//---Mapeamento de Hardware---//
#define led 5
#define btn 4


//Verifica se o bluetooth esta habilitado corretamente
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif

//---Variáveis Globais---//
char dado;
bool flagBtn=0;
bool flagLed=0;

//Cria uma instância de BluetoothSerial chamado SerialBT
BluetoothSerial SerialBT;

void setup(){
   Serial.begin(19200);
   SerialBT.begin("UFFS-CC");
   Serial.println("O dispositivo foi iniciado, agora você pode emparelhá-lo com bluetooth!");
   pinMode(led, OUTPUT);
   pinMode(btn, INPUT);  
}


void loop(){
   leBotao();
   leSerial();
   leBluetooth();
   delay(20);
}

//==============================================//
void leSerial() {
  if(Serial.available()) {
     dado=(Serial.read());
     SerialBT.write(Serial.read());
     escreveBluetooth();
  }  
}

//==============================================//
void leBluetooth(){
  if(SerialBT.available()){
     dado=(SerialBT.read());
     Serial.write(SerialBT.read());
     escreveBluetooth();
  } 
}

//==============================================//
void leBotao(){
  if((digitalRead(btn)==LOW)&&(flagBtn==0)){
      flagBtn=1;
      flagLed=!flagLed;
      if(flagLed==0) 
         dado='b';
      if(flagLed==1) 
         dado='B';
      escreveBluetooth();
  }
  if((digitalRead(btn)==HIGH)&&(flagBtn==1)){
    flagBtn=0;
  }
}

//==============================================//
void escreveBluetooth(){
  if(dado=='B'){
     digitalWrite(led,HIGH);
     SerialBT.print("Led ON via botao");
     Serial.println("Led ON via botao");
     SerialBT.print("*LR255*");
  }
  if(dado=='b'){
     digitalWrite(led,LOW);
     SerialBT.print("Led OFF via botao");
     Serial.println("Led OFF via botao");
     SerialBT.print("*LR50*");
  } 
  if(dado=='l'){
     digitalWrite(led,HIGH);
     SerialBT.print("Led ON via bluetooth");
     Serial.println("Led ON via bluetooth");
     SerialBT.print("*LR255*");
  }  
  if(dado=='d'){
     digitalWrite(led,LOW);
     SerialBT.print("Led OFF via bluetooth");
     Serial.println("Led OFF via bluetooth");
     SerialBT.print("*LR50*");
  } 
  if(dado=='L'){
     digitalWrite(led,HIGH);
     SerialBT.print("Led ON via SERIAL");
     Serial.println("Led ON via SERIAL");
     SerialBT.print("*LR255*");
  }
  if(dado=='D'){
     digitalWrite(led,LOW);
     SerialBT.print("Led OFF via SERIAL");
     Serial.println("Led OFF via SERIAL");
     SerialBT.print("*LR50*");
  }     
}