#include <Adafruit_SSD1306.h>
#include <DHT.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); 

#define DHTPIN1 4   
#define DHTPIN2 16
#define DHTPIN3 17      
#define DHTTYPE DHT22     
DHT dht1(DHTPIN1, DHTTYPE);
DHT dht2(DHTPIN2, DHTTYPE);
DHT dht3(DHTPIN3, DHTTYPE);  

#define LED_PIN 2          
#define TEMP_THRESHOLD 60  
#define HUMIDITY_THRESHOLD 70  

void setup() {
  Serial.begin(9600);

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.display();
  
  dht1.begin();
  dht2.begin();
  dht3.begin();

  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW); 
}

void loop() {
  float temperature1 = dht1.readTemperature();
  float humidity1 = dht1.readHumidity();

  float temperature2 = dht2.readTemperature();
  float humidity2 = dht2.readHumidity();

  float temperature3 = dht3.readTemperature();
  float humidity3 = dht3.readHumidity();
  

  if (isnan(temperature1) || isnan(humidity1)) {
    Serial.println(F("Failed to read from DHT sensor 1!"));
  }

  if (isnan(temperature2) || isnan(humidity2)) {
    Serial.println(F("Failed to read from DHT sensor 2!"));
  }

  if (isnan(temperature3) || isnan(humidity3)) {
    Serial.println(F("Failed to read from DHT sensor 3!"));
  }


  Serial.print(F("Temperature 1: ")); Serial.print(temperature1); Serial.println(" °C");
  Serial.print(F("Humidity 1: ")); Serial.print(humidity1); Serial.println(" %");   

  Serial.print(F("Temperature 2: ")); Serial.print(temperature2); Serial.println(" °C");  
  Serial.print(F("Humidity 2: ")); Serial.print(humidity2); Serial.println(" %");  

  Serial.print(F("Temperature 3: ")); Serial.print(temperature3); Serial.println(" °C");
  Serial.print(F("Humidity 3: ")); Serial.print(humidity3); Serial.println(" %");


  display.clearDisplay();
  display.setTextSize(1);         
  display.setTextColor(SSD1306_WHITE);  
  display.setCursor(0, 0);        


  display.print(F("S1 Temp: "));
  display.print(temperature1);
  display.println(F(" C"));
  display.print(F("S1 Humidity: "));
  display.print(humidity1);
  display.println(F(" %"));

  display.print(F("S2 Temp: "));
  display.print(temperature2);
  display.println(F(" C"));
  display.print(F("S2 Humidity: "));
  display.print(humidity2);
  display.println(F(" %"));

  display.print(F("S3 Temp: "));
  display.print(temperature3);
  display.println(F(" C"));
  display.print(F("S3 Humidity: "));
  display.print(humidity3);
  display.println(F(" %"));

  display.display();
  
  if (temperature1 > TEMP_THRESHOLD || humidity1 > HUMIDITY_THRESHOLD ||
      temperature2 > TEMP_THRESHOLD || humidity2 > HUMIDITY_THRESHOLD ||
      temperature3 > TEMP_THRESHOLD || humidity3 > HUMIDITY_THRESHOLD) {
    digitalWrite(LED_PIN, HIGH); 
  } else {
    digitalWrite(LED_PIN, LOW);  
  }


  delay(2000);
}