/* How to use the DHT-22 sensor with Arduino uno
   Temperature and humidity sensor
   More info: http://www.ardumotive.com/how-to-use-dht-22-sensor-en.html
   Dev: Michalis Vasilakis // Date: 1/7/2015 // www.ardumotive.com */

//Libraries
#include <DHT.h>;
#include <TM1637Display.h>

//Constants
#define DHTPIN 2     // what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino
#define CLK 3
#define DIO 4
TM1637Display display(CLK, DIO);
//Variables
int chk;
float hum;  //Stores humidity value
float temp; //Stores temperature value

// Create the °C Symbol
const uint8_t Celsius[] = {
  SEG_A | SEG_B | SEG_F | SEG_G,  // Circle
  SEG_A | SEG_D | SEG_E | SEG_F   // C
};

bool showTemp = true;
#define BUTTON 5

void setup()
{
    Serial.begin(9600);
	  dht.begin();
    display.setBrightness(5);  // Set the display brightness (0-7)
    pinMode(BUTTON, INPUT);
}

void loop()
{
  int buttonState = digitalRead(BUTTON);
  if(buttonState == HIGH){
    showTemp = !showTemp;
  }

    //Read data and store it to variables hum and temp
    hum = dht.readHumidity();
    temp= dht.readTemperature();
    //Print temp and humidity values to serial monitor
    // Serial.print("Humidity: ");
    // Serial.print(hum);
    // Serial.print(" %, Temp: ");
    // Serial.print(temp);
    // Serial.println(" Celsius");

    display.clear();  // Clear the display
    //long numToShow = temp *100 + hum; 
  
    if(showTemp){
      display.showNumberDec(temp, false, 2, 0);
      display.setSegments(Celsius, 2, 2);
    }
    else{
      display.showNumberDec(hum, false, 2, 0);
    }

    delay(500); //Delay 2 sec.
}