ببخشید از رو این کده سوال دارم

#include <dht.h>
#include "TM1637.h"

//{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
//0~9,A,b,C,d,E,F



#define dht_pin 2 // Pin sensor is connected to
#define CLK 3//Pins for TM1637
#define DIO 4

TM1637 tm1637(CLK,DIO);
dht DHT;


void setup(){

tm1637.init();
tm1637.set(BRIGHT_TYPICAL);
//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;

delay(1500);//Delay to let system boot


}//end "setup()"



void loop(){

//Start of Program

DHT.read11(dht_pin);


int temp = DHT.temperature;
int humidity = DHT.humidity;

int digitoneT = temp / 10;
int digittwoT = temp % 10;

int digitoneH = humidity / 10;
int digittwoH = humidity % 10;


tm1637.display(1,digitoneT);
tm1637.display(2,digittwoT);
tm1637.display(3,12); // put a C at the end

delay (3000);

tm1637.display(1,23);
tm1637.display(2,digitoneH);
tm1637.display(3,digittwoH);


//Wait 3 seconds before accessing sensor again.

//Fastest should be once every two seconds.
delay(3000);

}// end loop()