/***********************************************
 *
 * Aussenlampe
 * Fingers Welt 2018
 *
 ************************************************/

const int PIRPin = 2;         // Eingang vom PIR-Senspr
#define Lichtschelle    600
#define ZeitZaehlerMax  200

int PIRState = 0;         
int buttonStateAlt = 1;
int LightValue = 0;
char LichtistAN = 0;
int ZeitZaehler = 0;
 
void setup() 
 {
  pinMode(PIRPin, INPUT);
  Serial.begin(9600);
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);
  
  for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 1) 
       { 
        analogWrite (3, fadeValue);
        delay (5);
       } 

delay (2000);
       
       for (int fadeValue = 255 ; fadeValue > 0; fadeValue -= 1) 
         { 
          analogWrite (3, fadeValue);
          delay (5);
         } 
      analogWrite (3, 0);
  
 }

void loop () 
  {
    // Gib mir mal nackte Zahlen
    PIRState = digitalRead (PIRPin);
    LightValue = analogRead (A0);

    if (PIRState) digitalWrite(LED_BUILTIN, HIGH); else digitalWrite(LED_BUILTIN, LOW);

    // Wadde ebn....
    delay (250);

   // Müssn wir wat tun?
   if ( (PIRState == HIGH) && (LightValue < Lichtschelle) && (!(LichtistAN)) )
    {
      // Reiss die Lampe an
      LichtistAN = 1;
      ZeitZaehler = ZeitZaehlerMax;
      
      delay (200);
      for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 1) 
       { 
        analogWrite (3, fadeValue);
        delay (3);
       } 
    }  

   // Ist Lampe angesagt?
   if (LichtistAN)
    {
       ZeitZaehler--;
       if (ZeitZaehler == 0)
        {
         for (int fadeValue = 255 ; fadeValue >0; fadeValue -= 1) 
         { 
          analogWrite (3, fadeValue);
          delay (3);
         } 
           analogWrite (3, 0);  
           LichtistAN = 0;
        }

        // Nachtriggern bei Bewegung
        if (PIRState == HIGH) ZeitZaehler = ZeitZaehlerMax;
        
    } // Von if (LichtistAN)
      
    //----------------------- 
    // Laufende Debugausgabe
    //-----------------------
    Serial.print("PIR:");
    if (PIRState) Serial.print("1 "); else Serial.print("0");
    Serial.print(" Licht:");
    Serial.print (LightValue);
    Serial.print(" Zeit:");
    Serial.print (ZeitZaehler);
    Serial.print(" Lampe:");
    if (LichtistAN) Serial.print ("1 "); else Serial.print ("0 ");
    Serial.println (" ");

 }