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

// PIR Motion Sensor
#define PIR_PIN 13

// DHT22 Temperature Sensor
#define DHTPIN 14
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // Initialize the Serial Monitor
  Serial.begin(115200);

    // Initialize WiFi
  WiFi.mode(WIFI_STA);
  WiFi.begin("Wokwi-GUEST","");  // Connect to WiFi network
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("WiFi connected");

  
  // Initialize the PIR Motion Sensor pin
  pinMode(PIR_PIN, INPUT);

  // Initialize the DHT22 sensor
  dht.begin();

  Serial.println("TESTTTTT");
  
  // Initialize the LCD
  lcd.init();
  //lcd.begin(16, 2);
  lcd.backlight();

  // Display a startup message
  lcd.setCursor(0, 0);
  lcd.print("Motion Temp Mon");
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");
  delay(2000);
  lcd.clear();
}

void loop() {
  // Read the PIR sensor
  int motion = digitalRead(PIR_PIN);

  if (motion == HIGH) {
    // If motion is detected, read the temperature
    float temp = dht.readTemperature();
    
    // Check if any reads failed and exit early (to try again).
    if (isnan(temp)) {
      Serial.println("Failed to read from DHT sensor!");
      lcd.setCursor(0, 0);
      lcd.print("Error reading temp");
      lcd.setCursor(0, 1);
      lcd.print("Check sensor");
      delay(2000); // Wait for 2 seconds before trying again
      return;
    }
    
    // Print the temperature to the Serial Monitor
    Serial.print("Motion detected! Temp: ");
    Serial.print(temp);
    Serial.println(" C");
    
    // Display the temperature on the LCD
    lcd.clear(); // Clear the display before updating
    lcd.setCursor(0, 0);
    lcd.print("Motion detected!");
    lcd.setCursor(0, 1);
    lcd.print("Temp: ");
    lcd.print(temp);
    lcd.print(" C");
  } else {
    // If no motion is detected, clear the second line of the LCD
    lcd.clear(); // Clear the display before updating
    lcd.setCursor(0, 0);
    lcd.print("No motion");
    lcd.setCursor(0, 1);
    lcd.print("               ");
  }

  // Small delay to avoid flickering
  delay(1000);
}