#include <Arduino.h>

#define USER_LED 23
#define RELAY_1 32
#define RELAY_2 33
#define RELAY_3 25
#define RELAY_4 26

void setup()
{

  Serial.begin(115200);
  pinMode(USER_LED, OUTPUT);
  pinMode(RELAY_1, OUTPUT);
  pinMode(RELAY_2, OUTPUT);
  pinMode(RELAY_3, OUTPUT);
  pinMode(RELAY_4, OUTPUT);
  pinMode(18, INPUT_PULLDOWN);

  Serial.println("szevasz");
}

void loop()
{

  static bool allapot;

  allapot = !allapot;

  delay(1000);


  unsigned long start = micros();

  digitalWrite(RELAY_1, allapot);

  while (digitalRead(18) != allapot) {}

  unsigned long stop = micros();

  Serial.println(stop - start);


  if (digitalRead(18) == 1) {
    digitalWrite(USER_LED, 1);
  } else {
    digitalWrite(USER_LED, 0);
  }


}