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

// Define LCD addresses
LiquidCrystal_I2C lcd1(0x27, 16, 2); // Address for the first LCD
LiquidCrystal_I2C lcd2(0x26, 16, 2); // Address for the second LCD

// Define DHT sensor
#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Define Ultrasonic sensor pins
#define TRIG_PIN 12
#define ECHO_PIN 14

// Define PIR sensor pin
#define PIR_PIN 5
char ssid[] = "Wokwi-GUEST";
char pass[] = "";



long int mychannelid =  2653199;A
char mywriteapikey[] ="2ENNGRZJKVTFAQTW";  
//thingspeak initialization

void setup() {
   {
  Serial.begin(115200);

  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  //ultrasonic setup

  dht22.begin();
  //dht setup

  WiFi.mode(WIFI_STA);
  Serial.print("Attempting to connect");
  while(WiFi.status() != WL_CONNECTED)
  {
    WiFi.begin(ssid,pass);
    Serial.print(".");
    delay(5000);
  }
  Serial.println("\nConnected");
  //wifi setup

  ThingSpeak.begin(client);
  //ThingSpeak setup

  Serial.begin(115200);

  // Initialize DHT sensor
  dht.begin();

  // Initialize ultrasonic pins
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  // Initialize PIR sensor
  pinMode(PIR_PIN, INPUT);

  // Initialize LCDs
  lcd1.init();
  lcd1.backlight();
  lcd1.setCursor(0, 0);
  lcd1.print("Ultrasonic:");

  lcd2.init();
  lcd2.backlight();
  lcd2.setCursor(0, 0);
  lcd2.print("Temp/Humid:");
}

void loop() {
  // Read Ultrasonic sensor
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;

  // Display ultrasonic value
  lcd1.setCursor(0, 1);
  lcd1.print("Dist: ");
  lcd1.print(distance);
  lcd1.print(" cm  ");

  // Read DHT22 sensor
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  // Check if readings are valid
  if (isnan(temp) || isnan(hum)) {
    lcd2.setCursor(0, 1);
    lcd2.print("Error reading   ");
  } else {
    // Display DHT22 values
    lcd2.setCursor(0, 1);
    lcd2.print("T: ");
    lcd2.print(temp);
    lcd2.print("C ");
    lcd2.print("H: ");
    lcd2.print(hum);
    lcd2.print("% ");
  }

  delay(1000);
}