August 28, 2019 by Reginald Watson
Keep yourself healthy by monitoring levels of air pollution in your home with this Arduino dust detector project!
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| 1 | EEE-FPA221XAP | ||
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| 1 | 40-108-003 | ||
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| 1 | VERSAFIT-1/4-0-SP | ||
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| 1 | TEC810-12/1 | ||
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Due to increasing air pollution and the associated health problems, measuring air quality is becoming more and more necessary in big cities. There are many sensors available on the market that allow you to do measure air quality and recently, I ordered Sharp's GP2Y1010AU0F optical dust sensor. This dust sensor is small in size and can detect dust and smoke particles in the environment. It consumes very little power while it’s running, making it ideal for an always-on monitoring system.
This tutorial focuses on how to connect the Sharp optical dust sensor to an Arduino. The reading of the sensor will then be displayed on an OLED screen. The system is packed into an old inhaler which allows you to blow air into the sensor for easy testing.
The sensor has a tiny six-pin connection interface, it comes with a connector when you usually buy it. The sensor generates an analog output signal on pin5- Vo, it does not require any external components for operation and requires only a 3.3V supply, making it easy to interface with the Arduino board. Some example applications of this sensor include:
Sharp's GP2Y1010AU0F optical dust sensor.
I chose this dust sensor for the following reasons:
The dust sensor uses an optical sensing method to detect dust. A photosensor and an infrared light-emitting diode which is known as an IR LED are optically arranged in the dust sensor module. The photo-sensor (PT) detects the reflected IR LED rays which are bounced off of the dust particles in the air.
The GP2Y1010AU0F module can sense the tiniest particles in the air, which lets it detect even cigarette smoke. A high output pulse from the sensor is triggered whenever it detects dust.
The required materials for the air quality monitoring system
Grab an old inhaler and find a round piece of plastic (even a bottle cap will do the job). Glue one side of the pipe into the inhaler with a hot glue gun. The other side of the pipe goes to the dust area detector. Check out the images below.
Use an old inhaler and a plastic circle.
Glue one end of the piping to the inhaler.
Attach the other end of the piping to the sensor.
Interface the dust sensor to the Arduino as shown in the fritzing diagram below.
Connect the 3.3V/5V pin of the Arduino board to the Vcc pin of the dust sensor module.
Connect the V-LED of the sensor to the 100Ω resistor. Connect the sensor’s LED-GND and S-GND pins to the ground pin of Arduino.
The LED pin of the sensor should be connected with Arduino’s digital pin12, which is known as the output pin of the dust sensor module.
The V0 pin — which is an Analog pin — must be connected with the Arduino analog pin to A0. The Arduino code will output the dust concentration level of the sensor in the OLED 128X32.
The connections on Sharp's optical dust sensor.
Note: For an Arduino Uno, connect pin Vo of the GP2Y1010AU0F to pin A0 of the Uno. Pin V-LED and pin Vcc of GP2Y1010AU0F can be connected to either 5V or 3.3V of the Uno. The same applies to the Vcc of the OLED display. Use pins A4 and A5 as the SDA and SCL interface.
The final air quality tester.
/*
Upload Source Code
*/
#include <Arduino.h>
#include <U8g2lib.h>
#include <SPI.h>
#include <Wire.h>
U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0);
int measurePin = A0;
int ledPower = 12;
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);
u8g2.begin();
pinMode(ledPower,OUTPUT);
u8g2.clearBuffer(); // clear the internal memory
u8g2.setFont(u8g2_font_logisoso24_tr); // choose a suitable font at https://github.com/olikraus/u8g2/wiki/fntlistall
u8g2.drawStr(8,29,"Welcome"); // write something to the internal memory
u8g2.sendBuffer(); // transfer internal memory to the display
delay(800);
u8g2.clearBuffer(); // clear the internal memory
u8g2.setFont(u8g2_font_logisoso24_tr); // choose a suitable font at https://github.com/olikraus/u8g2/wiki/fntlistall
u8g2.drawStr(40,26,"TO"); // write something to the internal memory
u8g2.sendBuffer(); // transfer internal memory to the display
delay(800);
u8g2.clearBuffer(); // clear the internal memory
u8g2.setFont(u8g2_font_logisoso20_tr); // choose a suitable font at https://github.com/olikraus/u8g2/wiki/fntlistall
u8g2.drawStr(16,26,"Maker.Pro"); // write something to the internal memory
u8g2.sendBuffer(); // transfer internal memory to the display
delay(2000);
}
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.println("Raw Signal Value (0-1023):");
Serial.println(voMeasured);
Serial.println("Voltage:");
Serial.println(calcVoltage);
Serial.println("Dust Density:");
Serial.println(dustDensity);
u8g2.clearBuffer(); // clear the internal memory
u8g2.setFont(u8g2_font_pxplusibmvga9_tr); // choose a suitable font at https://github.com/olikraus/u8g2/wiki/fntlistall
u8g2.drawStr(0,15,"Dust Density "); // write something to the internal memory
u8g2.setCursor(0, 31);
u8g2.print(dustDensity);
// u8g2.drawStr(0,31,"AHHH123"); // write something to the internal memory
// u8g.print("Hello World!")
u8g2.sendBuffer(); // transfer internal memory to the display
delay(1000);
}After uploading the code, you should be able to see something similar to this video. In the video, I am using some talcum powder and blowing into the pipe to test the sensor.
I love challenging myself by creating new projects using different microcontrollers to see what I can come up with.
