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메이커 Maker

휴대용 미세먼지 측정기 - 아두이노 메가

 

PM2008M 미세먼지 센서 출력을 SSD1306 OLED에 표시하기 - 아두이노 메가사용

 

디지털 창작집단에서 메이커 활동으로 공기청정기를 메이커 활동을 진행했다. 당시에는 캐릭터 LCD를 사용했는데 이번에 출력을 OLED로 하는 게 좋을 듯해서 다시 코딩.

 

참고자료 : 레이저 미세먼지 센서 PM2008M 을 아두이노메가 측정 코드와 결과 

 

필요 부품: OLED, 온도 습도 센서, PM2008M 미세먼지 센서, RGB Led, 아두이노 메가 

 

아두이노 메가와 센서를 연결한 회로도

아래 회로도에서 미세먼지 센서 PM2008M 연결도는 위 링크를 참조하여 Serial  포트에 연결한다.

 

회로도대로 연결하여 각 구성품을 테스트하고 전체를 조합하여 완성한다. 각 구성품과 연결하는 방법과 테스트 하는 문서는 아래 링크를 참고하기 바란다. 문의 사항 환영

 

[소프트박스 코딩] - 소프트박스에서 온도 습도 센서 데이터 확인하기

[아두이노] - 아두이노 온도 습도 미터기 DHT11 과 OLED display 사용

[소프트박스 코딩] - 소프트박스에서 RGB LED로 컬러 불 켜기

[아두이노] - OLED 테스트 코드

[아두이노] - 아두이노 온도 습도 미터기 DHT11 과 OLED display 사용

[아두이노] - 먼지센서 PM2005, PM2007, PM2008M 아두이노 우노 예제코드

[아두이노] - 레이저 미세먼지 센서 PM2008M 에 대해 알아보자.

[메이커] - 미세먼지 개념과 미세먼지 센서(PM2008M) 알아보기

 

 

 

 

일단 잘 동작하는 소스코드 파일 

 

finedustmon.ino
0.01MB

 

아래는 소스코드

 

// Written by EmbeddedUser 
// Refer to blog http://www.jaimeferns.in/2016/10/how-to-build-humidity-and-temperature.html
// Youtube Video https://www.youtube.com/watch?v=g-rcEd_2I-w
// Humidity meter with DHT11, Arduino and I2c OLED display
// Now support displaying sensor error and configuring deg C or deg F

#include <DHT.h>
#include "U8glib.h"

#include <SoftwareSerial.h>
#define BT_RX 7 //HM10의 TX에 연결 - 주의 
#define BT_TX 8 //HM10의 RX에 연결 - 주의

SoftwareSerial HM10(BT_RX,BT_TX);  // RX핀(7번)은 HM10의 TX에 연결 
                                     // TX핀(8번)은 HM10의 RX에 연결  

// Display defaults to Degree F. TO use metric display,
// comment out next line to display temperature in Degree C,
#define METRIC

#define DHTPIN 2          // what digital pin we're connected to
// Uncomment whatever type you're using!
#define DHTTYPE DHT11     // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor

// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors.  This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE);
//U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NO_ACK);  // Display which does not send AC
//U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);  // I2C / TWI
//U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0|U8G_I2C_OPT_NO_ACK|U8G_I2C_OPT_FAST); // Fast I2C / TWI
//U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NO_ACK);  // Display which does not send AC

const uint8_t logo[] PROGMEM =
{
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
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  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
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  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
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  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x18, 0x0, 0x38, 0x6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0xc3,
  0x80, 0x0, 0x0, 0x0, 0x18, 0x0, 0x38, 0x6, 0x0, 0x40, 0x0, 0x0, 0x0, 0x0, 0x1,
  0xc3, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x38, 0x0, 0x0, 0xc0, 0x0, 0x0, 0x0, 0x0,
  0x1, 0xc3, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x38, 0x0, 0x0, 0xc0, 0x0, 0x0, 0x0,
  0x0, 0x1, 0xc3, 0x8e, 0xc, 0x6e, 0x60, 0xf8, 0x7, 0xb8, 0x3e, 0x3, 0xfc, 0x38, 0x18,
  0x0, 0x0, 0x1, 0xc3, 0x8e, 0xc, 0x7e, 0xf0, 0xf8, 0xf, 0xf8, 0x3e, 0x3, 0xfc, 0x38,
  0x38, 0x0, 0x0, 0x1, 0xff, 0x8e, 0xc, 0x77, 0x30, 0x18, 0xe, 0x38, 0x6, 0x0, 0xc0,
  0x18, 0x30, 0x0, 0x0, 0x1, 0xff, 0x8e, 0xc, 0x67, 0x30, 0x18, 0x1c, 0x38, 0x6, 0x0,
  0xc0, 0x1c, 0x30, 0x0, 0x0, 0x1, 0xff, 0x8e, 0xc, 0x63, 0x30, 0x18, 0x1c, 0x38, 0x6,
  0x0, 0xc0, 0xc, 0x70, 0x0, 0x0, 0x1, 0xc3, 0x8e, 0xc, 0x63, 0x30, 0x18, 0x1c, 0x18,
  0x6, 0x0, 0xc0, 0xc, 0x60, 0x0, 0x0, 0x1, 0xc3, 0x8e, 0xc, 0x63, 0x30, 0x18, 0x1c,
  0x18, 0x6, 0x0, 0xc0, 0xe, 0x60, 0x0, 0x0, 0x1, 0xc3, 0x86, 0x1c, 0x63, 0x30, 0x18,
  0x1c, 0x18, 0x6, 0x0, 0xc0, 0x6, 0xc0, 0x0, 0x0, 0x1, 0xc3, 0x87, 0x1c, 0x63, 0x30,
  0x18, 0xe, 0x38, 0x6, 0x0, 0xe0, 0x7, 0xc0, 0x0, 0x0, 0x1, 0xc3, 0x87, 0xec, 0x63,
  0x31, 0xff, 0x8f, 0xd8, 0x7f, 0xe0, 0xfe, 0x3, 0xc0, 0x0, 0x0, 0x1, 0xc3, 0x83, 0xcc,
  0x63, 0x31, 0xff, 0x87, 0x98, 0x7f, 0xe0, 0x7e, 0x3, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0x3, 0x80, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1f, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1e, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3c, 0x38, 0x0, 0x0, 0x80, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3c, 0x78, 0x0, 0x1, 0x80, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3c, 0x78, 0x0, 0x1, 0x80, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3e, 0x78, 0x3e, 0x7, 0xf8,
  0xf, 0x81, 0xcf, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x36, 0xd8, 0x7f, 0x7,
  0xf8, 0x1f, 0xc0, 0xdf, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x36, 0xd8, 0xe1,
  0x81, 0x80, 0x38, 0x60, 0xf0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x33, 0xd8,
  0xc1, 0xc1, 0x80, 0x30, 0x70, 0xe0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x33,
  0x99, 0xff, 0xc1, 0x80, 0x7f, 0xf0, 0xe0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x33, 0x99, 0xff, 0xc1, 0x80, 0x7f, 0xf0, 0xc0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x31, 0x99, 0xc0, 0x1, 0x80, 0x70, 0x0, 0xc0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x30, 0x18, 0xc0, 0x1, 0x80, 0x30, 0x0, 0xc0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x30, 0x18, 0xe1, 0xc1, 0xc0, 0x38, 0x70, 0xc0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x30, 0x18, 0x7f, 0x81, 0xfc, 0x1f, 0xe0, 0xc0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x30, 0x18, 0x3e, 0x0, 0xfc, 0xf, 0x80, 0xc0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
  0x0, 0x0, 0x0, 0x0
};

bool first = true;
float hum = 0.0;
float temp = 0.0;
float hIndex = 0.0;
bool dht_test(float* humPerc, float* tempF, float* heatIndex);

int redPin_1 = 5;
int greenPin_1 = 6;
int bluePin_1 = 7;

unsigned char Send_data[5] = {0x11,0x02,0x0B,0x07, 0xDB}; // 농도읽는명령
unsigned char Receive_Buff[56];                           // data buffer
unsigned long PM1, PM25, PM10;                                     // 농도저장변수 : 각 32bit(8bit*4 = 32)
unsigned long COM_SUCCESS, COM_COUNT;                              // 통신성공/통신시도횟수
unsigned char recv_cnt = 0;

void setup(void)
{
  Serial.begin(9600);
  while (!Serial) ;
  
  Serial2.begin(9600);
  while (!Serial2);
  
  dht.begin();
  first = true;

   pinMode(redPin_1, OUTPUT);
   pinMode(greenPin_1, OUTPUT);
   pinMode(bluePin_1, OUTPUT);

  //BLE
  HM10.begin(9600);

  // assign default color value
  if (u8g.getMode() == U8G_MODE_R3G3B2)
  {
    u8g.setColorIndex(255);     // white
  }
  else if (u8g.getMode() == U8G_MODE_GRAY2BIT)
  {
    u8g.setColorIndex(3);         // max intensity
  }
  else if (u8g.getMode() == U8G_MODE_BW)
  {
    u8g.setColorIndex(1);         // pixel on
  }
  else if (u8g.getMode() == U8G_MODE_HICOLOR)
  {
    u8g.setHiColorByRGB(255, 255, 255);
  }

  // picture loop
  u8g.firstPage();

  do
  {
    u8g.drawBitmapP(0, 0, 16, 64, logo);
  }
  while (u8g.nextPage());

  dht_test(&hum, &temp, &hIndex);
}
void HumMeter(float* humPerc, float* temp, float* heatIndex)
{
  u8g.setFont(u8g_font_fub11);
  u8g.setFontRefHeightExtendedText();
  u8g.setDefaultForegroundColor();
  u8g.setFontPosTop();
  u8g.drawStr(4, 0, "PM2.5  ");
  u8g.setPrintPos(80, 0);
  //u8g.print(*humPerc);
  u8g.print(PM25);
/*#ifdef METRIC
  // if metric system, display Celsius
  u8g.drawStr(4, 20, "Temp C");
#else
  //display Farenheit
  u8g.drawStr(4, 20, "Temp F");
#endif
*/
  u8g.drawStr(4, 20, "PM10   ");

  u8g.setPrintPos(80, 20);
  u8g.print(PM10);
  
  //u8g.drawStr(4, 40, "Heat Ind");
  u8g.setPrintPos(4, 40);
  u8g.print((int)*temp);
  u8g.drawStr(30, 40, "C");
  u8g.setPrintPos(80, 40);
  u8g.print((int)*humPerc);
  u8g.drawStr(100, 40, "%"); 
}

void loop(void)
{
  bool result = dht_test(&hum, &temp, &hIndex);

  airquality_rgb();
  Serial.print("here ");
  display_pm10();
  Serial.print("here2 ");
  
  //for ble test
  /*if (HM10.available()) {
    Serial.write(HM10.read());
  }
  if (Serial.available()) {
    HM10.write(Serial.read());
  }*/
  

  if (first)
  {
    // skip displaying readings first time, as its stale data.
    first = false;
  }
  else
  {
    if(result == false)
    {
      u8g.firstPage();
      do 
      {
        // sensor error
        u8g.setFont(u8g_font_fub11);
        u8g.setFontRefHeightExtendedText();
        u8g.setDefaultForegroundColor();
        u8g.setFontPosTop();
        u8g.drawStr(10, 30, "Sensor Error");
      }
      while (u8g.nextPage());
    }
    else
    {
      u8g.firstPage();
      do
      {
        HumMeter(&hum, &temp, &hIndex);
      }
      while (u8g.nextPage());
    }
  }
}

void airquality_rgb()
{
  if(PM25 <= 15)
    setColor(255, 0, 0); // cyan
  if((PM25>15) && (PM25<=35))
    setColor(255, 0, 255); // green
  if((PM25>35) && (PM25<=75))
    setColor(0, 0, 255); // yello
  if(PM25>75)
    setColor(0, 255, 255); // red
}

void setColor(int red, int green, int blue)
{
  digitalWrite(redPin_1, red);
  digitalWrite(greenPin_1, green);
  digitalWrite(bluePin_1, blue); 
}

void Send_CMD(void)                                        // COMMAND
{
  unsigned char i;
  for(i=0; i<5; i++)
  {
    Serial2.write(Send_data[i]);
    delay(1);      // Don't delete this line !!
  }
}
unsigned char Checksum_cal(void)                          // CHECKSUM 
{
  unsigned char count, SUM=0;
  for(count=0; count<55; count++)
  {
     SUM += Receive_Buff[count];
  }
  return 256-SUM;
}


bool dht_test(float* humPerc, float* temp, float* heatIndex)
{
  // Wait a few seconds between measurements.
  delay(2000);
  *humPerc = 0;
  *temp = 0;
  *heatIndex = 0;
  
  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f))
  {
    Serial.println("Failed to read from DHT sensor!");
    return false;
  }

  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" *C ");
  Serial.print(f);
  Serial.print(" *F\t");
  Serial.print("Heat index: ");
  Serial.print(hic);
  Serial.print(" *C ");
  Serial.print(hif);
  Serial.println(" *F");
  *humPerc = h;
#ifdef METRIC
  // metric system, load degree celsius
  *temp = t;
  *heatIndex = hic;
#else
  *temp = f;
  *heatIndex = hif;
#endif
  return true;

  //send humi temp via BLE
  if (Serial.available()) {
    //HM10.write(*temp);
    HM10.write(Serial.read());    
  }
}

void display_pm10()
{
  COM_COUNT++;  
  Send_CMD();  // Send Read Command
  
  while(1)
  {
    if(Serial2.available())
    { 
       Receive_Buff[recv_cnt++] = Serial2.read();
      if(recv_cnt ==56){recv_cnt = 0; break;}
    }
    
  } 
  if(Checksum_cal() == Receive_Buff[55])  // CS 확인을 통해 통신 에러 없으면
  {
        COM_SUCCESS++;
        PM1 = (unsigned long)Receive_Buff[3]<<24 | (unsigned long)Receive_Buff[4]<<16 | (unsigned long)Receive_Buff[5]<<8| (unsigned long)Receive_Buff[6];  // 농도계산(시프트)
        PM25 = (unsigned long)Receive_Buff[7]<<24 | (unsigned long)Receive_Buff[8]<<16 | (unsigned long)Receive_Buff[9]<<8| (unsigned long)Receive_Buff[10];  // 농도계산(시프트)
        PM10 = (unsigned long)Receive_Buff[11]<<24 | (unsigned long)Receive_Buff[12]<<16 | (unsigned long)Receive_Buff[13]<<8| (unsigned long)Receive_Buff[14];  // 농도계산(시프트)
        Serial.write("COM count : ");
        Serial.print(COM_SUCCESS);
        Serial.write(" / ");
        Serial.print(COM_COUNT);
        Serial.write("    PM1.0 : ");
        Serial.print(PM1);
        Serial.write("    PM2.5 : ");
        Serial.print(PM25);
        Serial.write("    PM10 : ");
        Serial.println(PM10);

    }
   else
   {
     Serial.write("CHECKSUM Error");
   }
}


 

 

휴대용 미세먼지 측정기 PM1.0, PM2.5, PM10 까지 잘 나온다. 먼지는 향으로 시험.

 

 

 

 

더욱 좋은 정보를 제공하겠습니다.~ ^^

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