//include libraries required for the DHT sensor, define digital input pin and used DHT sensor type
#include <DHT.h>
#define DHTPIN 2   
#define DHTTYPE DHT11   

DHT dht(DHTPIN, DHTTYPE);

//Define analogue input pins 
const int ldr = A0;
const int precip = A2;
const int moist = A5;

//define constants for soil moisture 
const int dry=585; 
const int wet=298; 

void setup() {
  Serial.begin(115200); //start serial monitor 
  dht.begin(); 
}

void loop() {
//read and print Temperature and Humidity from DHT, no calibration necessary
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  Serial.print("Relative humidity: ");  
  Serial.print(humidity); 
  Serial.println(" %");
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °Celsius");
  
//read analogue input pins and convert data into meaningful output 
//(for details: https://wiki.eolab.de/doku.php?id=amc2020:group_f:start&do=)

  int ldrStatus=analogRead(ldr);
  int sensorVal=analogRead(moist);
  int value = analogRead(precip);
  int percHumidity=map(sensorVal, wet, dry, 100,0); 
  Serial.print("Light conditions: "); 
if (ldrStatus <= 50) { 
  Serial.println("sunny day");
}
else if ((ldrStatus > 50) && (ldrStatus  <= 85)) {
  Serial.println("cloudy day ");
}
else if ((ldrStatus > 85) && (ldrStatus  <= 135)) {
  Serial.println("rain probability ");
}
else if ((ldrStatus > 135) && (ldrStatus  <= 900)) {
  Serial.println("dusk or dawn");
}
else {
  Serial.println("darkness");
}
  Serial.print("Precipitation: ");
  if (value<=480){ 
    Serial.println("Water level: 0mm - Empty!"); 
  }
  else if (value>480 && value<=530){ 
    Serial.println("Water level: 0mm to 5mm"); 
  }
  else if (value>530 && value<=615){ 
    Serial.println("Water level: 5mm to 10mm"); 
  }
  else if (value>615 && value<=660){ 
    Serial.println("Water level: 10mm to 15mm"); 
  } 
  else if (value>660 && value<=680){ 
    Serial.println("Water level: 15mm to 20mm"); 
  }
  else if (value>680 && value<=690){ 
    Serial.println("Water level: 20mm to 25mm"); 
  }
  else if (value>690 && value<=700){ 
    Serial.println("Water level: 25mm to 30mm"); 
  }
  else if (value>700 && value<=705){ 
    Serial.println("Water level: 30mm to 35mm"); 
  }
  else if (value>705){ 
    Serial.println("Water level: 35mm to 40mm"); 
  }
  //print data
  Serial.print("Soil moisture: ");
  Serial.print(percHumidity);
  Serial.println("%");
  Serial.println();
  delay(2000);

}