#include "DHT.h" 
#define DHTPIN 4 // DHT22 connected to D4 
#define DHTTYPE DHT22 // DHT22 sensor type 
DHT dht(DHTPIN, DHTTYPE); 
int ldrPin = A0; // LDR connected to A0 
int bulbPin = 2; // Bulb (LED) connected to D2 
int fanPin = 5; // Fan (LED/Motor) connected to D5 
int lightThreshold = 500; // Adjust based on Wokwi simulaƟon
float tempThreshold = 30.0; // Fan ON if temperature > 30°C 
void setup() { 
 Serial.begin(9600); 
 dht.begin(); 
 pinMode(bulbPin, OUTPUT); 
 pinMode(fanPin, OUTPUT); 
} 
void loop() { 
 // Read LDR value 
 int ldrValue = analogRead(ldrPin); 
 Serial.print("LDR Value: ");
 Serial.println(ldrValue); 
 // Control bulb based on sunlight 
 if (ldrValue < lightThreshold) { 
 digitalWrite(bulbPin, HIGH); // Dark → Bulb ON 
 } else { 
 digitalWrite(bulbPin, LOW); // Bright → Bulb OFF 
 } 
 // Read temperature 
 float temp = dht.readTemperature(); 
 Serial.print("Temperature: "); 
 Serial.println(temp); 
 // Control fan based on temperature 
 if (temp > tempThreshold) { 
 digitalWrite(fanPin, HIGH); // Fan ON 
 } else { 
 digitalWrite(fanPin, LOW); // Fan OFF 
 } 
 delay(2000); // wait 2 seconds before next reading