#include <Wire.h>
#include <LiquidCrystal_I2C.h>

int ledRed = 10;
int ledGreen = 11;
int signal = 2;
int pirState = LOW;
int value = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2);



void setup() {
  // put your setup code here, to run once:
  pinMode(ledRed, OUTPUT);
  pinMode(ledGreen, OUTPUT);
  
  pinMode(signal, INPUT);

  Serial.begin(9600);
  
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Ready");
  delay(700);
  lcd.clear();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Motion detected:");
  lcd.setCursor(3,1);
  lcd.print("FALSE");

}

void loop() {
  // put your main code here, to run repeatedly:
  value = digitalRead(signal);
  if (value == HIGH) {
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledGreen, LOW);
    if (pirState == LOW) {
      Serial.println("Motion detected!");
      lcd.clear();
      lcd.backlight();
      lcd.setCursor(0,0);
      lcd.print("Motion detected:");
      lcd.setCursor(3,1);
      lcd.print("TRUE");
      pirState = HIGH;
    }

  }else {
    digitalWrite(ledRed, LOW);
    digitalWrite(ledGreen, HIGH);
    if (pirState == HIGH) {
      Serial.println("Motion ended");
      lcd.backlight();
      lcd.setCursor(0,0);
      lcd.print("Motion detected:");
      lcd.setCursor(3,1);
      lcd.print("FALSE");
      pirState = LOW;
    }

  }
  
}