#include "DHT.h"
#include <Adafruit_SSD1306.h>
#define DHTTYPE DHT22   // DHT 22 (AM2302)
#define ldr A0

int DHTPIN = 4;
int btn = 3;
int buzz = 6;
int led = 5;
int btnVal = 0;
int btnCount = 0;
float humidity = 0;
float tempC = 0;
float ldrV = 0;

DHT dht(DHTPIN, DHTTYPE);
Adafruit_SSD1306 oled(128,64);

void setup() {
  pinMode(ldr, INPUT);
  pinMode(btn, INPUT);
  pinMode(led, OUTPUT);
  pinMode(buzz, OUTPUT);
  Serial.begin(9600);
  dht.begin();
  oled.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  oled.display();
}

void loop() {
  //Reading button value
  btnVal = digitalRead(btn);
  //Reading light intensity 
  ldrV = analogRead(ldr);
  // Reading temperature or humidity takes about 250 milliseconds!
  humidity = dht.readHumidity();
  tempC = dht.readTemperature();
  if(btnVal == 0){
     oled.clearDisplay();
    oled.setTextSize(1);
    oled.setTextColor(SSD1306_WHITE);
    oled.setCursor(0,0);
    oled.print("Light Value: ");
    oled.print(ldrV);
    oled.display();
  digitalWrite(buzz, LOW);
  digitalWrite(led, LOW);
  }
  else {
    oled.clearDisplay();
  oled.setCursor(0,0);
  oled.setTextSize(1);
  oled.setTextColor(SSD1306_WHITE);
  oled.print("Humidity: ");
  oled.print(humidity);
  oled.setCursor(0,10);
  oled.print("Temperature: ");
  oled.print(tempC);
  oled.display();
  if(tempC > 51){
    digitalWrite(buzz, HIGH);
    digitalWrite(led, HIGH);
  }

  }
  
Serial.println(tempC);
delay(1000);
}