Help me, speed with hc-sr04

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4

Post your complete code (for post #3). I suspect thast you pulled this from the internet somewhere and did not copy evevrything; ultrasonicRead() is probably a function that contains this part of your code

  digitalWrite(TRIG, HIGH); 		// generacion del pulso a enviar
  delay(1);				            // al pin conectado al trigger
  digitalWrite(TRIG, LOW);	     	// del sensor
  
  DURACION = pulseIn(ECO, HIGH);	// con funcion pulseIn se espera un pulso
  	
  DISTANCIA = DURACION / 58.2;		// distancia medida en centimetros

Rewriting it for your scenario will probably be

uint32_t ultrasonicRead()
{
  digitalWrite(TRIG, HIGH); 		// generacion del pulso a enviar
  delay(1);				            // al pin conectado al trigger
  digitalWrite(TRIG, LOW);	     	// del sensor
  
  uint32_t duration = pulseIn(ECO, HIGH);	// con funcion pulseIn se espera un pulso
  	
  return (duration / 58.2);		// distancia medida en centimetros
}

Code not tested nor compiled.

Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project :wink: See About the IDE 1.x category.