Modul 7 PIR SENSOR

#include <LiquidCrystal_SR_LCD3.h>
const int PIN_LCD_STROBE = 2;
const int PIN_LCD_DATA = 3;
const int PIN_LCD_CLOCK = 4;
LiquidCrystal_SR_LCD3 lcd(PIN_LCD_DATA, PIN_LCD_CLOCK, PIN_LCD_STROBE);

int ledPin = A5;                // choose the pin for the LED
int inputPin = 12;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status
int button=7, push=0, ok=0, on=0, menu=0;
int buzzer=A0;

unsigned long turnoff;

void setup() {
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare sensor as input
  pinMode(button, INPUT);
  pinMode(buzzer, OUTPUT);
  lcd.begin(16,2);
  lcd.home();

  Serial.begin(9600);
}

void loop(){
  Serial.print(" BUTTON : ");
  Serial.println(digitalRead(button));
  while(digitalRead(button)==LOW){
    if(push==0 && ok==0){
      push=1;
    }else if(push==1 && ok==1){
      push=2;
    }else if(push==2 && ok==2){
      push=3;
    }else if(push==3 && ok==3){
      push=1;
    }else if(push==4 && ok==4){
      push=1;
    }
  }
  val = digitalRead(inputPin);  // read input value

  if(push==0){
      lcd.clear();
      ok=0;
  }else if(push==1 || push==2 || push==3){
    ok=1;
    if(push==2){
      ok=2;
    }else if(push==3){
      ok=3;
    }
    lcd.clear();
    lcd.setCursor(0,0);
    if(push==1){
      lcd.print("Menu 1");
    }else if(push==2){
      lcd.print("Menu 2");
    }else if(push==3){
      lcd.print("Menu 3");
    }
    if((turnoff+3000) < millis() && on==1){
      val=LOW;
      on=0;
    }
    if (val == HIGH) {
      lcd.setCursor(0,1);
      lcd.print(" Motion Detected! ");
      if (pirState == LOW && on==0) {
        // we have just turned on
        Serial.println("Motion detected!");
        // We only want to print on the output change, not state
        pirState = HIGH;
        if(on==0){
          turnoff = millis();
        }
        on=1;
        if(push==2){
          lcd.setCursor(8,0);
          lcd.print("buz:ON");
          analogWrite(buzzer, 255);
        }
      }
      if(push==3){
        for(int i=0; i<5; i++){
          digitalWrite(ledPin, HIGH);
          delay(200);
          digitalWrite(ledPin, LOW);
          delay(200);
        }
      }else{
        digitalWrite(ledPin, HIGH);  // turn LED ON
      }
    } else {
      digitalWrite(ledPin, LOW); // turn LED OFF
      lcd.setCursor(0,1);
      lcd.print(" Motion ended! ");
      if (pirState == HIGH){
        // we have just turned of
        Serial.println("Motion ended!");
        // We only want to print on the output change, not state

        pirState = LOW;
        lcd.setCursor(8,0);
        lcd.print("buz:OFF");
        analogWrite(buzzer, 0);
      }
    }
  }else if(push==4){
    ok=4;
  }

  delay(200);
}