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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
DHT dht(14, DHT22);
int pinRed = 33;
int pinWhite = 25;
int pinBlue = 26;
int pinbuz = 27;
int chanbuz = 0;
bool isBuzzerOn = false;

Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT , &Wire, -1);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(pinWhite, OUTPUT);
  pinMode(pinBlue, OUTPUT);
  pinMode(pinRed, OUTPUT);
  dht.begin();
  ledcAttachPin(pinbuz, chanbuz);
  oled.begin(SSD1306_SWITCHCAPVCC, 0x3c);
}

void oled_info(float tempC, float tempK, float tempF, float hum){
  oled.clearDisplay(); 
  oled.setTextSize(1);  
  oled.setTextColor(WHITE); 
  oled.setCursor(0,20);
  oled.print("C: ");
  oled.println(tempC); 
  oled.setCursor(0,30);
  oled.print("F: ");
  oled.println(tempF); 
  oled.setCursor(0,40);
  oled.print("K: "); 
  oled.println(tempK);
  oled.print("Hum: ");
  oled.println(hum);
  oled.display();
}

void loop() {
  delay(50); 
  float tempC = dht.readTemperature();
  float tempK = tempC + 273.15;
  float tempF = (tempC * 9.0 / 5.0) + 32.0;
  float hum = dht.readHumidity();

  if (tempC <= 15 && hum <= 10){
    digitalWrite(pinBlue, LOW);
    digitalWrite(pinRed, LOW);
    digitalWrite(pinWhite, HIGH);
    isBuzzerOn = true;
    oled_info(tempC, tempK, tempF, hum);
  }else if ( (tempC >= 16 && tempC <= 27) && (hum >= 11 && hum <= 50) ){
    isBuzzerOn = false;
    digitalWrite(pinBlue, HIGH);
    digitalWrite(pinRed, LOW);
    digitalWrite(pinWhite, LOW);
    oled_info(tempC, tempK, tempF, hum);
  }else if (tempC > 27 && hum >= 51){
    isBuzzerOn = true;
    digitalWrite(pinBlue, LOW);
    digitalWrite(pinRed, HIGH);
    digitalWrite(pinWhite, LOW);
    oled_info(tempC, tempK, tempF, hum);
  }else{
    isBuzzerOn = false;
    digitalWrite(pinBlue, LOW);
    digitalWrite(pinRed, LOW);
    digitalWrite(pinWhite, LOW);
    oled.clearDisplay(); 
    oled.setTextSize(1);  
    oled.setTextColor(WHITE);
    oled.setCursor(3,10);
    oled.println("Menyaala Abaanggkuuh!!");
    oled.display();
  }

    if (isBuzzerOn) {
    for (int i = 0; i < 3; i++) {
      ledcWriteTone(chanbuz, 5000);
      delay(50);
      ledcWriteTone(chanbuz, 0);
      delay(50);
    }
  }
}