#define RELAY_PIN 18
#define buttonPin 2 // the number of the pushbutton pin

// variables will change:
// variables for reading the pushbutton status
int buttonStatePrevious = LOW;
int buttonStateCurrent = LOW;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //Serial.println("Hello, ESP32!");
  pinMode(RELAY_PIN, OUTPUT);
   // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
}

void buttonPressed(){
  int buttonPush = LOW;
  buttonPush = digitalRead(buttonPin);

   if (buttonPush == HIGH && buttonStatePrevious == LOW){
        buttonStateCurrent = HIGH;
        buttonStatePrevious = buttonStateCurrent;
       
   }
   else if(buttonPush == HIGH && buttonStatePrevious == HIGH){
            buttonStateCurrent = LOW;
            buttonStatePrevious = buttonStateCurrent;
            
   }
}

void loop() {
  buttonPressed();
  
  
  if( buttonStateCurrent == HIGH){
      digitalWrite(RELAY_PIN, HIGH); // turn on
  
     }else if(buttonStateCurrent == LOW){
      digitalWrite(RELAY_PIN, LOW); // turn off
     

  }
  


}