Keystudio MP Shieldv2 DHT11 Modified

//------------------------------------
//*                                  *
//*       Keystudio MP Shield v2     *
//*       DHT11 Modified Code        *
//*        by learnelectronics       *
//*                                  *
//*          May, 11, 2019           *
//*                                  *
//*  email:[email protected]     *
//*www.youtube.com/c/learnelectronics*

#include "DHT.h"
#define DHTPIN 7
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);


//defining three pins of 74HC595
int latchPin = 4;//ST_CP
int clockPin = 5;//SH_CP
int dataPin = 2; //DS

//defining three key input
int key1 = A1;
int key2 = A2;
int key3 = A3;

//buzzer pin
int buzzer = 3;

//pin definition of flowing light
int led1 = 13;
int led2 = 12;
int led3 = 11;
int led4 = 10;
int led5 = 9;
int led6 = 8;


int dat_wei[4]={0x01,0x02,0x04,0x08};    //LED Segment Displays
//showing 1--4
int dat_duan[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; //LED Segment Displays showing 0--9
char i=0;
void setup ()
{
  pinMode(latchPin,OUTPUT);
  pinMode(clockPin,OUTPUT);
  pinMode(dataPin,OUTPUT);

  pinMode(key1,INPUT);
  pinMode(key2,INPUT);
  pinMode(key3,INPUT);

  pinMode(buzzer,OUTPUT);

  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
  pinMode(led3,OUTPUT);
  pinMode(led4,OUTPUT);
  pinMode(led5,OUTPUT);
  pinMode(led6,OUTPUT);
  for(char i=8;i<14;i++)
   digitalWrite(i,HIGH);

   dht.begin();
}

void loop()

{


if(digitalRead(key1)==LOW )
  SMG();                    //testing LED Segment Displays
if(digitalRead(key2)==LOW )
  buzzer_();                //testing buzzer
if(digitalRead(key3)==LOW)
  led_display();            //testing LED
if(digitalRead(key1)==HIGH & digitalRead(key2)==HIGH & digitalRead(key3)==HIGH)
  analog();                //testing analog input
}

void SMG(void)
{
 digitalWrite(latchPin,LOW);                         //clear LED Segment Displays
 shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
 shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
 digitalWrite(latchPin,HIGH);

while(1)
 {
 digitalWrite(latchPin,LOW);
                                                       //MSBFIRST,transmitting binary bit from high to low,74HC595 starts from first piece, and displaces data from Q0 to Q7. If there is data, it will start from the second piece like this.
 shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[i]);   //data about second piece
 shiftOut(dataPin, clockPin, MSBFIRST ,dat_wei[i]);    //way of MSBFIRST,data about first piece
 digitalWrite(latchPin,HIGH);
 i++;
 if(i==4){i=0;}
 if(digitalRead(key1)==HIGH)
 {
   digitalWrite(latchPin,LOW);                         //clear LED Segment Displays
   shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
   shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
   digitalWrite(latchPin,HIGH);
   break;
 }
 }
}

void buzzer_(void)
{
 char i;

 digitalWrite(latchPin,LOW);                         //clear LED Segment Displays
 shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
 shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
 digitalWrite(latchPin,HIGH);

 while(1)
 {
 for(i=0;i<80;i++)// output a frequency sound
 {
  digitalWrite(buzzer,LOW);// sound
  delay(1);//delay1ms
  digitalWrite(buzzer,HIGH);//not sound
  delay(1);//ms delay
 }
 for(i=0;i<100;i++)// output a frequency sound
 {
  digitalWrite(buzzer,LOW);// sound
  digitalWrite(buzzer,HIGH);//not sound
  delay(2);//2ms delay
 }
 if(digitalRead(key2)==HIGH)
 {
   digitalWrite(latchPin,LOW);                         //clear LED Segment Displays
   shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
   shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
   digitalWrite(latchPin,HIGH);
   break;
 }
 }
}

void led_display()
{
digitalWrite(latchPin,LOW);                         //clear LED Segment Displays
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
digitalWrite(latchPin,HIGH);

while(1)
{
 digitalWrite(led1,LOW);
 delay(100);
 digitalWrite(led1,HIGH);
 digitalWrite(led2,LOW);
 delay(100);
 digitalWrite(led2,HIGH);
 digitalWrite(led3,LOW);
 delay(100);
 digitalWrite(led3,HIGH);
 digitalWrite(led4,LOW);
 delay(100);
 digitalWrite(led4,HIGH);
 digitalWrite(led5,LOW);
 delay(100);
 digitalWrite(led5,HIGH);
 digitalWrite(led6,LOW);
 delay(100);
 digitalWrite(led6,HIGH);
 if(digitalRead(key3)==HIGH)
 {
   break;
 }
}
}


void analog()
{
int val,qian,bai,shi,ge;
val=dht.readTemperature(true);
qian=val/1000;
bai=val%1000;
bai=bai/100;
shi=val%100;
shi=shi/10;
ge=val%10;
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[qian]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x01);
digitalWrite(latchPin,HIGH);
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[bai]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x02);
digitalWrite(latchPin,HIGH);
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[shi]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x04);
digitalWrite(latchPin,HIGH);
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[ge]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x08);
digitalWrite(latchPin,HIGH);
}