// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2019-02-11 오전 12:54:02
// by Ok-Hyun Park
//----------------------------------------소스 1.
#include <SoftwareSerial.h>
int   T=2,R=3;
SoftwareSerial my_blue(T,R);
//
#include <DHT.h>
int temp_sensor=4;
DHT my_sensor(temp_sensor,DHT11);
//
#include <Servo.h>
Servo servo;
//
int   CDS_sensor  =A0; // 조도센서
int   RAIN_sensor =A1
int   flame_sensor=A2;
int   SOUND_sensor=A3;
int   vibration_sensor=A4;
int   motor=A5;
//
int   ledPower=5;
int   sensor=6;
int   vibration_sensor=7;
int   red=10,green=9,blue=8;
int   RELAY=11;
int   PIR_sensor=12;
int   buzzer=13;
//
char  color;
int   flame=0,angle=0,freq=200;
//
void setup(){
  Serial.begin(9600);
  my_blue.begin(9600);
  //
  my_sensor.begin();
  //
  pinMode(ledPower,OUTPUT);
  pinMode(red,OUTPUT); pinMode(green,OUTPUT); pinMode(blue,OUTPUT);
  pinMode(buzzer,OUTPUT);
  //
  pinMode(PIR_sensor,INPUT);       // 인체감지센서
  pinMode(vibration_sensor,INPUT); // 진동센서
  pinMode(sensor,INPUT);
  pinMode(vibration_sensor,INPUT);
  //
  servo.attach(motor); servo.write(angle);
}
//
int getdust(){ 
  digitalWrite(ledPower,0);                 delayMicroseconds( 280); // samplingTime
  float voMeasured=analogRead(DUST_output); delayMicroseconds(  40); // deltaTime
  digitalWrite(ledPower,1);                 delayMicroseconds(9680); // sleepTime
  float calcVoltage=voMeasured*(3.3/1024);
  float dustDensity=100*calcVoltage-0.1;
  return(dustDensity);
}
//
void redFunction()   { digitalWrite(blue,  0); digitalWrite(green,  0); digitalWrite(red,  1); }
void blueFunction()  { digitalWrite(blue,  1); digitalWrite(green,  0); digitalWrite(red,  0); }
void greenFunction() { digitalWrite(blue,  0); digitalWrite(green,  1); digitalWrite(red,  0); }
void yellowFunction(){ digitalWrite(blue,  0); digitalWrite(green, 50); digitalWrite(red,255); }
void violetFunction(){ digitalWrite(blue,255); digitalWrite(green,  0); digitalWrite(red,255); }
void whiteFunction() { digitalWrite(blue,110); digitalWrite(green,220); digitalWrite(red,255); }
void cyanFunction()  { digitalWrite(blue,255); digitalWrite(green,255); digitalWrite(red,  0); }
//
void loop(){
  if(Serial.available()){
    color=Serial.read();
    if(color=='r'){ redFunction();    }
    if(color=='b'){ blueFunction();   }
    if(color=='g'){ greenFunction();  }
    if(color=='y'){ yellowFunction(); }
    if(color=='v'){ violetFunction(); }
    if(color=='w'){ whiteFunction();  }
    if(color=='c'){ cyanFunction();   }
  }
  //----------------------------------------------
  if(++count>=10){ count=0; // 1초마다 측정
    int a=map(getdust(),8,133,10,100);
    char b[4]="";
    sprintf(b,"%03d",a); Serial.print("dust: "); Serial.println(b); delay(250);
    //----------------------------------------------
    int readingSensor=analogRead(RAIN_sensor);
    Serial.print("rain: "); Serial.println(readingSensor); Serial.println();
    //----------------------------------------------
    int temp=my_sensor.readTemperature();
    int humi=my_sensor.readHumidity();
    my_blue.print("temp: ");  my_blue.print(temp);
    my_blue.print("/humi: "); my_blue.println(humi);
    //----------------------------------------------
    int sensor=analogRead(CDS_sensor); // 조도센서의 데이터 받아오기
    //
    if(sensor>1000){           // 주위가 어둡다면
      if(angle<180)servo.write(++angle); // 서보 모터의 각도를 180도로
    }
    else{ // 주위가 밝다면
      if(angle>0)servo.write(--angle); // 서보 모터의 각도를 180도로
    }
    //----------------------------------------------
    flame=analogRead(flame_sensor);
    Serial.print("Flame="); Serial.println(flame); // 시리얼통신 화면에 변수에 저장된 값을 출력
    //
    if(flame>0){
      Serial.println(" Flame is around you ");
      if(freq!=1000)tone(buzzer,1000,50); else tone(buzzer,200,50);
    }
  }
  //----------------------------------------------
  int vibration_data=digitalRead(vibration_sensor);
  Serial.print("vib: "); Serial.println(vibration_data);
  //----------------------------------------------
  int value=digitalRead(PIR_sensor);
  Serial.println(value);
  digitalWrite(RELAY,value); // 인체 감지되면 2번에 전류를 흘려라 // 인체감지가 안되면 전류를 끊어라
  //----------------------------------------------
  int Val=analogRead(SOUND_sensor); // 사운드센서 소음 측정
  if(Val>40)Serial.println(Val);
  //----------------------------------------------
  delay(100); noTone(buzzer);
}
 
남는 핀이 없겠습니다.
참고해서 완성시켜보세요