#define BT   35
#define LED   5
 
void IRAM_ATTR TESTE()
{
  // Toggle The LED
  digitalWrite(LED, !digitalRead(LED));
}
 
void setup()
{
  pinMode(LED, OUTPUT);
  pinMode(BT, INPUT);
  attachInterrupt(BT, TESTE, RISING);
}
 
void loop()
{
  // Do Nothing...
}