#include <Adafruit_Sensor.h> 
#include "DHT.h" 
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define DHTPIN 12
#define DHTTYPE DHT22 
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

DHT dht(DHTPIN, DHTTYPE); 

// Initialize DHT sensor. 
void setup() { 
  Serial.begin(9600); // Start serial communication at 115200 baud. 
  dht.begin(); // Initialize the DHT11 sensor. 
  pinMode(5, OUTPUT); 
  pinMode(6, OUTPUT); 
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
    }
  delay(2000);
  display.clearDisplay();

  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 10);
  // Display static text
  display.println("Assignment 2B\nSmart Farming System");
  display.display(); 
} 

void loop() { 
  // Delay between measurements. 
  delay(200); // Wait 0.2 seconds 

  // Reading temperature or humidity 
  float humidity = dht.readHumidity(); // Read humidity 
  float temperature = dht.readTemperature(); // Read temperature 

  // Check if any reads failed and exit early (to try again). 
  if (isnan(humidity) || isnan(temperature)) 
  { 
    Serial.println("Failed to read from DHT sensor!"); 
    return; 
  } 

  display.display(); 
  Serial.print("Humidity: "); 
  Serial.print(humidity); 
  Serial.print("% Temperature: "); 
  Serial.print(temperature); 
  Serial.println("°C "); 
 
  if(temperature>=25)
  { 
   digitalWrite(6,HIGH); 
   digitalWrite(13,HIGH);
   display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 10);
   display.println("\n\n\n\nTemperature HIGH");
  display.display();
  } 
  else
  { 
    digitalWrite(6,LOW);
    digitalWrite(13,LOW); 
  } 

  if (humidity>=60)
  { 
    digitalWrite(5,HIGH);
    digitalWrite(13,HIGH); 
    display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 10);
    display.println("\n\n\n\n\nHumidity HIGH");
  display.display();
  } 
  else
  { 
    digitalWrite(5,LOW);
    digitalWrite(5,LOW); 
  } 
}