// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-06-07 오전 10:09:39
// by Ok-Hyun Park
//
#include <Serial.h>
//
int Raindrops_pin=A0;  // 빗방울센서 핀
int Particle_pin=A1;   // 먼지센서  핀
int enablePin=11,in1Pin=10,in2Pin=9;
int sensor_led=12;
//
boolean bReverse=false;
int nSpeed=200,sRain=0,sParticle=0;
int waiting=40;
int sampling=280;      // 적외선 led를 키고,센서 값을 읽어 들여 미세먼지를 측정하는 샘플링 시간
float stop_time=9680;  // 센서를 구동하지 않는 시간
float dust_value=0;    // 센서에서 입력 받은 미세먼지 값
float dustDensityug=0; // ug/m^3 값을계산
//
void setup(){
  pinMode(in1Pin,OUTPUT); pinMode(in2Pin,OUTPUT);
  pinMode(Raindrops_pin,INPUT); // 빗방울 감지핀을 아날로그 입력으로 설정
  pinMode(sensor_led,OUTPUT);   // 먼지센서  아날로그 출력으로 설정
  Serial.begin(9600);
}
//
void loop(){
  sRain=analogRead(Raindrops_pin); delay(100); Serial.println(sRain);
  digitalWrite(sensor_led,LOW);        delayMicroseconds(sampling);
  dust_value=analogRead(Particle_pin); delayMicroseconds(waiting);
  digitalWrite(sensor_led,HIGH);       delayMicroseconds(stop_time);
  dustDensityug=(0.17*(dust_value*(5.0/1024))-0.1)*1000;
  Serial.print(dustDensityug);
  //
  if((sRain<100)){ setMotor(100,true); } else{ setMotor(100,false); }
  //
  sParticle=analogRead(Particle_pin); delay(100);
  //
  if(dustDensityug<30.0){ stop(); }
  else{ 
    pwm=dustDensityug-30;
    pwm*=2;
    if(pwm>255)pwm=255;
    run(pwm);
  }
}
//
void stop(void  ){ analogWrite(enablePin,255); digitalWrite(in2Pin,0); digitalWrite(in1Pin,0); }
void run(int pwm){ analogWrite(enablePin,pwm); digitalWrite(in2Pin,0); digitalWrite(in1Pin,1); }
 
이 코드로 돌려보시고
동작이 안되면
 
 
// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-06-07 오전 10:11:30
// by Ok-Hyun Park
//
int enablePin=11,in1Pin=10,in2Pin=9;
//
void setup(){
  pinMode(in1Pin,OUTPUT); pinMode(in2Pin,OUTPUT);
}
//
void loop(){
  run(255); delay(2000);
  stop();   delay(2000);
}
//
void stop(void  ){ analogWrite(enablePin,255); digitalWrite(in1Pin,0); }  
void run(int pwm){ analogWrite(enablePin,pwm); digitalWrite(in1Pin,1); }
 
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