const int ldrPin = 35;       
const int temperaturePin = 32;  
const int pumpPin = 26;       // This is for LED which is used instead of a water pump 
const int soilMoisturePin = 33; // This is a simulated soil moisture (potentiometer) since wokwi doesnt have soil moisture
const int rainPin = 14;       // This is a simulated rain sensor (push-button switch) since wokwi doesnt have rain sensor
// all this basically tell u where the wires are connected. ex: the ldr is connected to pin 35

void setup() {
  Serial.begin(115200);
  pinMode(pumpPin, OUTPUT);
  pinMode(rainPin, INPUT_PULLUP); 
}

void loop() {
  int lightIntensity = analogRead(ldrPin); // Reading LDR sensor
  float temperature = getTemperature(temperaturePin); // Reading NTC Temperature Sensor
  int soilMoisture = analogRead(soilMoisturePin); // reading simulated soil moisture sensor (potentiometer)
  bool isRaining = !digitalRead(rainPin); //  reading the simulated rain sensor (push button)

  // Based on these conditions the water pump (LED) will fuction
  if (lightIntensity < 200 && temperature > 25 && !isRaining && soilMoisture < 500) {
    digitalWrite(pumpPin, HIGH); // Turn on the water pump (simulated LED)
  } else {
    digitalWrite(pumpPin, LOW); // Turn off the water pump (simulated LED)
  }

  //printing or displaying sensor data to the serial monitor
  Serial.print("Light Intensity: ");
  Serial.print(lightIntensity);
  Serial.print("\tTemperature: ");
  Serial.print(temperature);
  Serial.print("°C\tRain: ");
  Serial.print(isRaining ? "Yes" : "No");
  Serial.print("\tSoil Moisture: ");
  Serial.println(soilMoisture);

  delay(1000); 
}

float getTemperature(int pin) {
  int rawValue = analogRead(pin);
  float voltage = (rawValue / 1023.0) * 3.3; 
  float r = (3300.0 / voltage) - 1000.0; 
  float steinhart;
  steinhart = log(r / 10000.0);  
  steinhart /= 3950.0;            
  steinhart += 1.0 / (298.15 + 273.15);  
  steinhart = 1.0 / steinhart - 273.15;  
  return steinhart;
  // this entire process called steinhart is used to convert analog readings to
   //into a temperature value in degrees Celsius. I did this sice in wokwi they dont have ADC (Analog to digital converter)
}