Arduino显示PM2.5

这代码一般都是复制过来，在小改下就行了

代码如下：

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>  

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);  

#define LOGO16_GLCD_HEIGHT 16 //定义显示高度
#define LOGO16_GLCD_WIDTH  16 //定义显示宽度 

int measurePin = ; //Connect dust sensor to Arduino A0 pin
int ledPower = ; //Connect 3 led driver pins of dust sensor to Arduino D2
int samplingTime = ;
int deltaTime = ;
int sleepTime = ;

int dustVal=;
int i=;
float ppm=;
char s[];
float voltage=;
float dustdensity=;
float ppmpercf=;

void setup(){
  Serial.begin();
  pinMode(ledPower,OUTPUT);
 // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3D (for the 128x64)
  // init done
  i=;
  ppm=;
  display.clearDisplay();
}
void loop(){
  i=i+;
  digitalWrite(ledPower,LOW); // power on the LED
  delayMicroseconds(samplingTime);
  dustVal = analogRead(measurePin); // read the dust value
  ppm=ppm+dustVal;
  delayMicroseconds(deltaTime);
  digitalWrite(ledPower,HIGH); // turn the LED off
  delayMicroseconds(sleepTime);

  voltage=ppm/i*0.0049;
  dustdensity=0.17*voltage-0.1;
  ppmpercf=(voltage-0.0256)*;
  if(ppmpercf<) ppmpercf=; if(dustdensity<) dustdensity=; if(dustdensity>0.5)
  dustdensity=0.5;
  String dataString="";
  dataString+=dtostrf(voltage,,,s);
  dataString+="PM2.5 ---> ";
  dustdensity = dustdensity*;
  dataString+=dtostrf(dustdensity,,,s);
  dataString+="    -----> ";
  dataString+=dtostrf(ppmpercf,,,s);
  i=;
  ppm=;
   Serial.println(dustdensity);
  Serial.println(dataString);
  display.clearDisplay();
  display.setCursor(,);
  display.setTextSize();             //设置字体大小
  display.setTextColor(WHITE);        //设置字体白色
  display.print("dustDensity:");
  display.print(dataString);                //输出字符
  display.display();                  //显示以上 

delay();
}

模块：

OLED12864显示屏:

模块针脚        Arduino针脚

VCC     ---->   3.3V

GND    ---->    GND

SCL     ---->    A5

SDA    ---->    A4

夏普灰尘传感器GP2Y10：