//bool Forrige flanke;
int ledState=HIGH;     // the current state of LED
int lastButtonState;    // the previous state of button
int currentButtonState; // the current state of button
//
const int BUTTON_PIN = 3; // Arduino pin connected to button's pin
const int LED_PIN    = 4; // Arduino pin connected to LED's pin
//************************************************************
// Initiering og setup, kjører 1 gang ved programstart
void setup()
{
  pinMode(4, OUTPUT);//Ladesjekk
  pinMode(2, OUTPUT);//startrele
  pinMode(7, INPUT);//Oljetrykk
  pinMode(3, INPUT);//ladelys
  pinMode(5, INPUT);//Startknapp
  //
//Serial.begin(9600);
//currentButtonState = digitalRead(BUTTON_PIN);
}
//************************************************************



//************************************************************
// Hovedprogramloop, kjører i ring uendelig
void loop()
{
/*
  if ( digitalRead(5) == true ) //Trykket på START-knappen ?
  {
    //START-knappen er inne
    if ( digitalRead(7) )//Lavt oljetrykk ?
    {
      //Slå på starteren:
      digitalWrite(2, HIGH);
    }

  }
  //START-knappen er ute:
  digitalWrite(2, LOW);
*/

  //if ( digitalRead(3) == HIGH ) digitalWrite(4, HIGH);
  //if ( digitalRead(3) == LOW ) digitalWrite(4, LOW);

  lastButtonState    = currentButtonState;      // save the last state
  currentButtonState = digitalRead(BUTTON_PIN); // read new state

//
  if(   (lastButtonState != currentButtonState)  && (currentButtonState==HIGH)  )  ledState = !ledState;
  
  digitalWrite(LED_PIN, ledState); 

}
//************************************************************









/*
  Vanligste datatyper:
  Byte:   8bits, kan lagre 0 - 255
  Short:  16 bits, kan lagre -32,768 - 32,767
  Int:    32 bits, kan lagre -2,147,483,648 - 2,147,483,647
  Bool:   True eller False (Sann eller Usann)
*/