#include <Wire.h>
#include "DHT.h"
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#define DHTTYPE DHT22
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

int counter = 0;
int currentStateCLK;
int lastStateCLK, btnState;
String currentDir ="0";
unsigned long lastButtonPress = 0;

#define CLK 3
#define DT 4
#define SW 2

const long interval = 40000;
float Humidity;
float Temperature;
float current_Humidity;
float current_Temperature;
uint8_t DHTPin = 8;
DHT dht(DHTPin, DHTTYPE);
unsigned long previous_Millis = 0;
void setup() {
  // put your setup code here, to run once:
pinMode(DHTPin, INPUT);
pinMode(CLK,INPUT_PULLUP);
pinMode(DT,INPUT_PULLUP);
pinMode(SW, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(SW),doEncoder,LOW);
display.clearDisplay();
display.display();
display.setTextColor(SSD1306_WHITE);
Serial.begin(115200);
}


void loop() {

  // put your main code here, to run repeatedly:
unsigned long current_Millis = millis;
if (current_Millis - previous_Millis >= interval ){
  previous_Millis = current_Millis;
 
Temperature = dht.readTemperature();
display.clearDisplay();
display.setTextSize(1); 
display.setCursor(23, 05);
display.print("Temprature");
display.setTextSize(4);
display.setCursor(45, 30);
display.print(Temperature);
display.display();
}
else{
  Humidity = dht.readHumidity();

display.clearDisplay();
display.setTextSize(1); 
display.setCursor(23, 05);
display.print("Humidity");
display.setTextSize(4);
display.setCursor(45, 30);
display.print(Humidity);
display.display();}
  
}
void doEncoder()
{
  currentStateCLK = digitalRead(CLK);
  
 if (currentStateCLK != lastStateCLK  && currentStateCLK == 1)
 {

     if (digitalRead(DT) != currentStateCLK) 
     {
      counter ++;
      if(counter>=100)
        counter=100;
      currentDir ="CW";
     } 
    else
    {
      counter --;
      if(counter<=0)
        counter=0;
      currentDir ="CCW";
    }

    
    display.clearDisplay();
    display.setTextSize(1); 
    display.setCursor(23, 05);
    display.print("set temp");
    display.setTextSize(4); 
    display.setCursor(45, 30);
    if(counter<10)
      display.print("0");
    display.print(counter);
    display.display();
  }
}