/* 
   function:    Buzzer 
   text:        liga um Buzzer
   program:     ESP32_Buzzer.ino
   date:        nov 2024
   author:      João Machado
   board:       
   IDE:         Arduino 2.3.3
   choose:      dev
   note:        buzzer needs a driver bjt
*/  

void setup() {
  pinMode(23, OUTPUT);        //pin 23 as output pin	
  }
  

void loop(){
  tone(23, 440, 100); 
  //play tone com freq = 440 Hz durante 100ms;
}