/*
  Wokwi | questions
  hello!!! please need help
  authentic — 2/19/2026 10:25 AM
*/

//SMART GREEN HOUSE
// white light for the Illumination
//yellow for fan light
// blue for pump
#include <DHT.h>

#define DHTPIN 32
#define DHTTYPE DHT22

#define PUMP_PIN 26
#define FAN_PIN 25

#define SOIL_PIN 35
#define LIGHT_PIN 34
#define LIGHT_ACTUATOR 33


DHT dht(DHTPIN, DHTTYPE);

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

  pinMode(PUMP_PIN, OUTPUT);
  pinMode(FAN_PIN, OUTPUT);
  pinMode(LIGHT_ACTUATOR, OUTPUT);


  Serial.println("Smart Greenhouse System Starting...");
}

void loop() {

  // 🌡️ Read DHT22
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // 🌱 Read Soil Moisture (Potentiometer)
  int soilValue = analogRead(SOIL_PIN);

  // ☀️ Read Light Sensor
  int lightValue = 4096 - analogRead(LIGHT_PIN); // makes bright higher values

  Serial.println("-------------");
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  Serial.print("Soil Value: ");
  Serial.println(soilValue);

  Serial.print("Light Value: ");
  Serial.println(lightValue);

  // 💧 PUMP CONTROL (Soil Moisture)
  if (soilValue > 2500) {   // DRY SOIL
    digitalWrite(PUMP_PIN, HIGH);
    Serial.println("Pump ON (Dry Soil)");
  }
  else if (soilValue < 1800) { // WET SOIL
    digitalWrite(PUMP_PIN, LOW);
    Serial.println("Pump OFF (Soil Wet)");
  }
  // 💧 PUMP CONTROL (Soil + Humidity)
  if (soilValue > 2500 || humidity < 40) {   // Dry soil OR Dry air
    digitalWrite(PUMP_PIN, HIGH);
    Serial.println("Pump ON (Dry soil or low humidity)");
  }
  else if (soilValue < 1800 && humidity > 50) {
    digitalWrite(PUMP_PIN, LOW);
    Serial.println("Pump OFF (Soil wet & humidity OK)");
  }

  // 🌬️ FAN CONTROL (Temperature)
  if (temperature > 32) {
    digitalWrite(FAN_PIN, HIGH);
    Serial.println("Fan ON (Hot)");
  }
  else if (temperature < 28) {
    digitalWrite(FAN_PIN, LOW);
    Serial.println("Fan OFF (Cool)");
  }
  // 💡 GROW LIGHT CONTROL (LDR)
  if (lightValue < 1500) {   // DARK
    digitalWrite(LIGHT_ACTUATOR, HIGH);
    Serial.println("Grow Light ON (Dark)");
  }
  else if (lightValue > 2500) { // BRIGHT
    digitalWrite(LIGHT_ACTUATOR, LOW);
    Serial.println("Grow Light OFF (Bright)");
  }
  // 🌬️ FAN CONTROL (Temp + Humidity)
  if (temperature > 32 || humidity > 75) {  // Hot OR too humid
    digitalWrite(FAN_PIN, HIGH);
    Serial.println("Fan ON (Hot or high humidity)");
  }
  else if (temperature < 28 && humidity < 65) {
    digitalWrite(FAN_PIN, LOW);
    Serial.println("Fan OFF (Comfort climate)");
  }



  delay(2000);
}