#include "BluetoothSerial.h"
BluetoothSerial SerialBT;
#define ledR 22
#define ledA 19
#define ledV 15
char letra;

void setup ()
{
  Serial.begin(9600);
  SerialBT.begin("ESP32");
  pinMode(ledR, OUTPUT);
  pinMode(ledA, OUTPUT);
  pinMode(ledV, OUTPUT);
}
void loop()
{
  if (SerialBT.available())
  {
    letra = SerialBT.read();
    if (letra=='A')
    {
     digitalWrite(ledR , HIGH);
     digitalWrite(ledA , LOW);
     digitalWrite(ledV , LOW);
     Serial.write('a');
    }
    if (letra=='B')
    {
     digitalWrite(ledA , HIGH);
     digitalWrite(ledR , LOW);
     digitalWrite(ledV , LOW);
     Serial.write('b');
    }
     if (letra=='C')
    {
     digitalWrite(ledV , HIGH);
     digitalWrite(ledR , LOW);
     digitalWrite(ledA , LOW);
     Serial.write('c');
    }
  }
}