hardware preparation

GP2Y1014AU dust sensor module
insert image description here
150 ohm resistor
220uf capacitor

Technical Parameters
GP2Y1014AU Dust Sensor Module
• Power supply voltage: DC5±2V
• Working current: 20mA (peak value)
• Sensitivity: 0.5V/(0.1mg/m3)
• Minimum particle detection value: 0.8 microns
• Voltage in clean air: 0.9V Typical value
• Operating temperature: -10~65℃
• Storage temperature: -20~80℃
• Service life: 5 years
• Dimensions: 46mm×30mm×17.6mm
• Weight: 15g

Voltage range: VoH(V) — Output voltage when clean: Voc(V).
Convert this into dust concentration:
detection range of dust concentration (mg/m3) = possible detection range (variable output voltage range (V)) ÷ detection sensitivity: K(V/(0.1 mg/m3).
Smoke detection In the case of detection, the judgment value is as follows:
Judgment value = detected concentration (mg/m3) ÷ 10 ×K(V/(0.1 mg/m3) + output voltage (V) when clean

Detected concentration: 0.2 (mg/m3) When judging K: TYP 0.5 (V/(0.1 mg/m3)
When dust-free Output voltage: 0.9 (V) Judgment value = (0.2×10)×0.5+ 0.9 = 1.9V

wiring

I wired the color as shown above

PM2.5	Arduino
Blue - connected to the positive pole of the capacitor	5V
Green - connect to the negative pole of the capacitor	GND
White	11
yellow	GND
black	A5
red	5V
Capacitor positive	5V
Capacitor negative	GND

( resistor is connected in series with the positive pole of the capacitor )

Pin wiring: When the wiring port is on the left (from left to right)
Blue line: V-LED-Arduino 5V and 150 ohm resistor connect to the positive pole of the 220uf capacitor
Green line: LED-GND-Arduino GND connects to the negative pole of the 220uf capacitor
White line: LED -Arduino Digital Pin to ledPower can be customized to connect to 11
Yellow wire: S-GND Arduino GND to 220uf capacitor negative
black wire: Vo-Arduino Analog A5
Red wire: Vcc-Arduino 5V and 150 ohm resistor to 220uf capacitor positive

You can refer to the figure below ( from )
insert image description here

code section

int measurePin = A5;            
int ledPower = 11;              
 
unsigned int samplingTime = 280;
unsigned int deltaTime = 40;
unsigned int sleepTime = 9680;
 
float voMeasured = 0;
float calcVoltage = 0;
float dustDensity = 0;
 
void setup(){
    
    
  Serial.begin(9600);
  pinMode(ledPower,OUTPUT);
}
 
void loop(){
    
    
  digitalWrite(ledPower,LOW);
  delayMicroseconds(samplingTime);
 
  voMeasured = analogRead(measurePin);
 
  delayMicroseconds(deltaTime);
  digitalWrite(ledPower,HIGH);
  delayMicroseconds(sleepTime);
 
  calcVoltage = voMeasured*(5.0/1024);
  dustDensity = 0.17*calcVoltage-0.1;
 
  if ( dustDensity < 0)
  {
    
    
    dustDensity = 0.00;
  }
 
  Serial.print("空气质量数值：");
  Serial.println(voMeasured);
  
 /*
  Serial.print("当前实时电压电压:");
  Serial.println(calcVoltage); */
 
  Serial.print("P.M2.5浓度:");
  Serial.print(dustDensity);
  Serial.println("%");
 
  delay(1000);
}

Show results

Air index standard

air quality control

air index	air quality
3000+	very poor
1050-3000	poor
300-1050	generally
150-300	better
75-150	very good
0-75	very good

With smoke Under
insert image description here
normal conditions without smoke

Arduino dust and smoke sensor PM2.5 experiment