/*
 * This ESP32 code is created by esp32io.com
 *
 * This ESP32 code is released in the public domain
 *
 * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-button-toggle-relay
 */

#define BUTTON_PIN 27  // ESP32 pin GIOP22 connected to button's pin
#define RELAY_PIN  26  // ESP32 pin GIOP27 connected to relay's pin
#define BUZZER_PIN  5  // ESP32 pin GIOP27 connected to relay's pin

int last_button_state = HIGH;
int last_relay_state = LOW;

void setup() {
  Serial.begin(9600);                // initialize serial
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(RELAY_PIN, OUTPUT);        // set ESP32 pin to output mode
  pinMode(BUZZER_PIN, OUTPUT);        // set ESP32 pin to output mode
}

void loop() {
  int button_state = digitalRead(BUTTON_PIN); 
  int relay_state = digitalRead(RELAY_PIN);

  last_relay_state = relay_state;

  if (button_state != last_button_state) {

    last_button_state = button_state;
    
  if (last_button_state == LOW) {
    Serial.println("The button is pressed");
    // control relay arccoding to the toggled state
    digitalWrite(RELAY_PIN, !relay_state);

  delay(5000);

  }

  Serial.println("Desligando relé");

    // control relay arccoding to the toggled state
    digitalWrite(RELAY_PIN, LOW);

    button_state = digitalRead(BUTTON_PIN); 

if (button_state == LOW) {

     Serial.println("Permaneceu ligado demais");

     myTone(BUZZER_PIN);

  }

  if (last_button_state == HIGH) {

     Serial.println("Desligando buzzer");

     myNoTone(BUZZER_PIN);


  }

}


}

void myTone( int pin)
{
  ledcAttachPin(pin, 0);             // pin, channel
  ledcWriteNote(0, NOTE_F, 4);    // channel, frequency, octave
}

void myNoTone( int pin)
{
  ledcDetachPin(pin);
}