Description:

In the project we build Air Pollution Monitoring System using Arduino and SDS011 Nova PM Sensor. This is a simple air quality monitor which detects Particulate Matters in the air. Particulate Matter is also called as Particle Pollution. It is nothing but a mixture of solid particles and liquid droplets found in the air. Some particles, such as dust, dirt, soot, or smoke, are large or dark enough to be seen with the naked eye. PM 2.5 and PM 10 is measured in micrograms per cubic meter. PM 2.5 is the concentration of microscopic particles less than 2.5 microns in diameter and PM 10 is the concentration of microscopic particles less than 10 microns in diameter.

Here in this project we will be using Nova PM Sensor SDS011 to detect the Particulate Matter and display it on a 0.96’ SPI OLED Display. Everything will be controlled by Arduino UNO.

Circuit Diagram:

Components:

SR. NO.	COMPONENT	PINOUT DIAGRAM	BUY
1	Arduino UNO (Other Arduinos can be used too)	Arduino UNO Pinout Diagram⇗
2	Nova PM Sensor SDS011
3	0.96″ OLED Display

Steps and Info:

1. Get correct components as given. You can buy online or offline. I buy electronics components mostly from Amazon.

2. Start connecting the components. If you are new to connecting components in an electronic circuit, then use a Breadboard or you can straight up make connections using Jumper wires but it will create problem when there will be two or more connections needed at one pin (for example two or more different sensors 5V connection to Arduino’s 5V pin). But before soldering components on a PCB or printing a PCB for your circuit, better try using breadboard so that any errors and mistakes can be observed on breadboard and not after soldering. Or do connections in your way.

3. Now after building the circuit, download the Arduino IDE from https://www.arduino.cc/ website.

4. If you are new to Arduino IDE software, then watch this video we made specially for beginners about Arduino IDE.

5. If you know Arduino IDE then straight up copy the code we given and paste it into the Arduino IDE sketch.

6. Connect the Arduino to your Computer/device. Select a proper port, proper Arduino type and whatever other settings are. Here it is Arduino UNO. (If you don’t know what this all is then watch our video: ).

7. Compile the code and Upload it.

8. If any error occurs then try to troubleshoot it by finding/copy-pasting it into our Solve Errors page https://electronicsprojects.in/solve-errors/, or you can straight up paste the error on Internet and you know the rest. Also check if there are no spelling/syntax errors in the code. Compile the code again once to check if errors are fixed. I have given proper connections and code but still nothing is perfect.

9. Once code compiles and uploads smoothly, you can start testing the working of your circuit/project.

10. So turn ON the circuit, see the 0.96” SPI OLED Display, you will see the PM value of the atmosphere within the range of the SDS011 PM sensor. Try making small cloud of dust near the sensor and you will observe that the value of PM increases.

11. If it doesn’t work, then check connections and code. Also you can talk with me and the community through discord. All the links to social is given at the right side of this page.

Program Code:

/* https://www.electronicsprojects.in Air Pollution Monitoring Systems using Arduino, SDS011 Nova PM Sensor and 0.96” OLED Display */

#include <SDS011.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
float p10,p25;
int error;
SDS011 nova;
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_MOSI   9
#define OLED_CLK   8
#define OLED_DC    11
#define OLED_CS    12
#define OLED_RESET 10
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
  OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);
void setup() {
  nova.begin(3,4);
  Serial.begin(9600);
  display.begin(SSD1306_SWITCHCAPVCC);
  display.clearDisplay();
  display.display();
}
void loop() {
  error = nova.read(&p25,&p10);
  if (! error) {
    Serial.println("P2.5: "+String(p25));
    Serial.println("P10:  "+String(p10));
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(0,15);
    display.println("PM2.5");
    display.setCursor(67,15);
    display.println(p25);
    display.setCursor(0,40);
    display.println("PM10");
    display.setCursor(67,40);
    display.println(p10);
    display.display();
    display.clearDisplay();
  }
  delay(100);
}

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