++
/*
 * Robojax Arduino Step-by-Step Course
 * Lesson 26 Introduction to DHT11 Temperature and Humidity sensor
 
 * This is the Arduino code for the DHT11 module to read temperature and humidity.
 * This code can display temperature in:
 * C is used to get Celsius
 * F is used to get Fahrenheit
 * K is used for Kelvin
 * Watch the video https://youtu.be/0o5jKR7u8ts
 *  * 
 * Written by Ahmad Shamshiri for Robojax Video
 * Date: Jan 04, 2018, in Ajax, Ontario, Canada
 * Permission granted to share this code given that this
 * note is kept with the code.
 * Disclaimer: this code is "AS IS" and for educational purposes only.

 
   Please watch video instruction here https://youtu.be/0o5jKR7u8ts
 This code is available at http://robojax.com/course1/?vid=lecture11
 
with over 100 lectures Free On YouTube. Watch it here http://robojax.com/L/?id=338
Get the code for the course: http://robojax.com/L/?id=339 
* 
 * Code is available at http://robojax.com/learn/arduino

 * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.
 * This code has been downloaded from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>. 

*/

// header file from GetHub: https://github.com/adidax/dht11
#include <dht11.h>

dht11 DHT11; // create object of DHT11
#define dhtpin 2 // set the pin to connect to DHT11

void setup() {
    Serial.begin(9600);// setting up serial monitor

}

void loop() {
  DHT11.read(dhtpin);// initialize the reading
  //code for Robojax.com video
  int humidity = DHT11.humidity;// get humidity

   Serial.print(getTemp('C'));
   Serial.print("C ");
   Serial.print(getTemp('F'));
   Serial.print("F ");
   Serial.print(getTemp('K'));
   Serial.print("K ");
   Serial.print(" humidity:");
   Serial.print (humidity);
   Serial.println("% ");
   Serial.println();
 delay(500);
}


/*
 * getTemp(char type)
 * type character of upper case 
 * C is used to get Celsius
 * F is used to get Fahrenheit
 * K is used for Kelvin
 */
float getTemp(char type) {
    float temp = (float)DHT11.temperature;//get temp
  if(type =='F')
  {
    return temp * 1.8 + 32;// convert to Fahrenheit
  }else if(type =='K')
  {
    return temp + 274.15;// convert to Kelvin
  }else{
   return temp; 
  }
  
}