#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);
//LiquidCrystal_I2C lcd(0x3F, 16, 2);
//www.elegoo.com
//2018.10.25


#include <dht_nonblocking.h>
#define DHT_SENSOR_TYPE DHT_TYPE_11

static const int DHT_SENSOR_PIN = 2;
DHT_nonblocking dht_sensor( DHT_SENSOR_PIN, DHT_SENSOR_TYPE );
/*
 * Initialize the serial port.
 */
void setup( )
{
  Serial.begin( 9600);
}
/*
 * Poll for a measurement, keeping the state machine alive.  Returns
 * true if a measurement is available.
 */
static bool measure_environment( float *temperature, float *humidity )
{
  static unsigned long measurement_timestamp = millis( );

  /* Measure once every four seconds. */
  if( millis( ) - measurement_timestamp > 3000ul )
  {
    if( dht_sensor.measure( temperature, humidity ) == true )
    {
      measurement_timestamp = millis( );
      return( true );
    }
  }

  return( false );
}



/*
 * Main program loop.
 */
void loop( )
{
  float temperature;
  float humidity;

  /* Measure temperature and humidity.  If the functions returns
     true, then a measurement is available. */
  if( measure_environment( &temperature, &humidity ) == true )
  {
    Serial.print( "T = " );
    Serial.print( temperature, 1 );
    Serial.print( " deg. C, H = " );
    Serial.print( humidity, 1 );
    Serial.println( "%" );

     // Robojax code for LCD with I2C
  // initialize the LCD, 
  lcd.begin();
 
  // Turn on the blacklight and print a message.
  lcd.backlight();
  // Robojax code for LCD with I2C


  
  //start of loop Robojax code for LCD with I2C
  lcd.clear();
  lcd.print("Temp = ");
  lcd.print(temperature);
  lcd.setCursor (0,1); // go to start of 2nd line
  lcd.print("Humidity= ");
  lcd.print(humidity);
  //lcd.print(millis() / 1000);
  delay(500);
 //end of loopcode Robojax code for LCD with I2C

  }
}


 /*
This is code for LCD1602 Display with I2C module
 * watch the video for this code https://youtu.be/q9YC_GVHy5A
 
 * Permission granted to share this code given that this
 * note is kept with the code.
 * Disclaimer: this code is "AS IS" and for educational purpose only.
 * This library is based on work done by DFROBOT (www.dfrobot.com).
 */
/*
 *  This code has been modefied from the Arduino library
 *  Updated by Ahmad Nejrabi on Jan 20, 2018 at 11:09
 *  in Ajax, Ontario, Canada
 *  for Robojax.com
 *  
 *  This is code for LCD1602 Display with I2C module
 *  which can display text on the screen.
 */