Mustard Documentation
The project aims to address the issue of air quality monitoring, which is important in areas with air pollution, such as industrial areas, traffic, or indoor spaces with insufficient ventilation. This issue is important because air pollution can cause health problems, such as respiratory diseases, cardiovascular diseases, and weakened immunity.
Hardware Used
Board: Arduino UNO R4 WiFi
The brain of the project, providing processing power and Wi-Fi connectivity.
Sensor: MQ-135
Detects various gases in the air, providing data for analysis.
Output Devices
Includes a screen for visual feedback and LED for status indication.
What make this project special?
This project is special because it can provide real-time alerts and can connect to mobile phones, unlike general air quality sensors that may only display data on the device itself. This project allows users to view data via mobile phones, making monitoring easier.
Source Code
#include "WiFiS3.h"
#include "MQUnifiedsensor.h"
#include "SPI.h"
#include "Wire.h"
#include "Adafruit_GFX.h"
#include "Adafruit_SSD1306.h"
#define BLYNK_TEMPLATE_ID "FROM THE SCREEN"
#define BLYNK_TEMPLATE_NAME "TO THE RING"
#define BLYNK_AUTH_TOKEN "TO THE PEN TO THE KING"
#include "BlynkSimpleWifi.h"
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = ""; // Wi-Fi name
char pass[] = ""; // Wi-Fi password
#define placa "Arduino UNO"
#define Voltage_Resolution 5
#define pin A0
#define type "MQ-135"
#define ADC_Bit_Resolution 10
#define RatioMQ135CleanAir 3.6
#define pin_but1 4
#define OLED_RESET 4
int page = 0;
int limit = 6;
int ptmp;
MQUnifiedsensor MQ135(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
Adafruit_SSD1306 display(OLED_RESET);
int red_but = 10;
int yel_but = 9;
int gre_but = 8;
int buzz = 7;
void setup() {
Serial.begin(9600); // Init serial port
display.begin(SSD1306_SWITCHCAPVCC, 0x3c);
display.clearDisplay();
pinMode(red_but,OUTPUT);
pinMode(yel_but,OUTPUT);
pinMode(gre_but,OUTPUT);
pinMode(buzz,OUTPUT);
int but1 = 0;
pinMode(pin_but1,INPUT);
Serial.print("Im Starting");
Blynk.begin(auth, ssid, pass);
Serial.print("connected!");
MQ135.setRegressionMethod(1);
MQ135.init();
Serial.print("Calibrating please wait.");
float calcR0 = 0;
for (int i = 1; i <= 10; i++) {
MQ135.update();
calcR0 += MQ135.calibrate(RatioMQ135CleanAir);
Serial.print(".");
}
MQ135.setR0(calcR0 / 10);
Serial.println(" done!");
if (isinf(calcR0)) {
Serial.println("Warning: Connection issue, R0 is infinite (Open circuit detected) please check your wiring and supply");
while (1);
}
if (calcR0 == 0) {
Serial.println("Warning: Connection issue found, R0 is zero (Analog pin shorts to ground) please check your wiring and supply");
while (1);
}
Serial.println("** Values from MQ-135 **");
Serial.println("| CO | Alcohol | CO2 | Toluen | NH4 | Aceton | Air Quality |");
digitalWrite(gre_but,HIGH);
digitalWrite(red_but,HIGH);
digitalWrite(yel_but,HIGH);
delay(5000);
}
void loop() {
Blynk.run(); // Run Blynk
MQ135.update(); // Update sensor readings
MQ135.setA(605.18); MQ135.setB(-3.937); // CO concentration
float CO = MQ135.readSensor();
MQ135.setA(77.255); MQ135.setB(-3.18); // Alcohol concentration
float Alcohol = MQ135.readSensor();
MQ135.setA(110.47); MQ135.setB(-2.862); // CO2 concentration
float CO2 = MQ135.readSensor();
MQ135.setA(44.947); MQ135.setB(-3.445); // Toluen concentration
float Toluen = MQ135.readSensor();
MQ135.setA(102.2); MQ135.setB(-2.473); // NH4 concentration
float NH4 = MQ135.readSensor();
MQ135.setA(34.668); MQ135.setB(-3.369); // Aceton concentration
float Aceton = MQ135.readSensor();
float averageConcentration = (CO + Alcohol + (CO2 + 400) + Toluen + NH4 + Aceton) / 6.0;
float airQualityPercent = 100 - (averageConcentration / 1000.0) * 100;
if (airQualityPercent < 0) airQualityPercent = 0;
if (airQualityPercent > 100) airQualityPercent = 100;
String airQualityLevel = (airQualityPercent > 90) ? "Good" : (airQualityPercent > 75) ? "Moderate" : (airQualityPercent > 50) ? "Bad" : "Danger";
Blynk.virtualWrite(V1, CO);
Blynk.virtualWrite(V2, Alcohol);
Blynk.virtualWrite(V3, CO2 + 400); // Add baseline for CO2
Blynk.virtualWrite(V4, Toluen);
Blynk.virtualWrite(V5, NH4);
Blynk.virtualWrite(V7, airQualityPercent);
Blynk.virtualWrite(V8, airQualityLevel);
ptmp = page;
int but1 = digitalRead(pin_but1);
if (but1 == 0){
page = page + 1;
if (page > limit){
page = 0;
}
}
if(airQualityPercent > 90.00){
digitalWrite(red_but,LOW);
digitalWrite(yel_but,LOW);
digitalWrite(gre_but,HIGH);
digitalWrite(buzz,HIGH);
}
else if(airQualityPercent > 75.00){
digitalWrite(red_but,LOW);
digitalWrite(yel_but,HIGH);
digitalWrite(gre_but,LOW);
digitalWrite(buzz,HIGH);
}
else if(airQualityPercent > 50.00){
digitalWrite(red_but,HIGH);
digitalWrite(yel_but,LOW);
digitalWrite(gre_but,LOW);
digitalWrite(buzz,HIGH);
}
else {
static unsigned long previousMillis = 0;
const long interval = 500;
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
previousMillis = currentMillis;
digitalWrite(red_but, !digitalRead(red_but));
digitalWrite(yel_but, !digitalRead(yel_but));
digitalWrite(gre_but, !digitalRead(gre_but));
digitalWrite(buzz, !digitalRead(buzz));
}
}
Serial.print(but1);
Serial.print(" ");
Serial.println(page);
display.begin(SSD1306_SWITCHCAPVCC, 0x3c);
if (page == 0){
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("CO level");
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("---------------------");
display.setTextSize(2);
display.setTextColor(WHITE, BLACK);
display.println(CO);
}
if (page == 1){
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("Alcohol");
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("---------------------");
display.setTextSize(2);
display.setTextColor(WHITE, BLACK);
display.println(Alcohol);
}
if (page == 2){
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("Baseline CO2");
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("---------------------");
display.setTextSize(2);
display.setTextColor(WHITE, BLACK);
display.println(CO2 + 400);
}
if (page == 3){
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("Toluen");
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("---------------------");
display.setTextSize(2);
display.setTextColor(WHITE, BLACK);
display.println(Toluen);
}
if (page == 4){
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("NH4");
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("---------------------");
display.setTextSize(2);
display.setTextColor(WHITE, BLACK);
display.println(NH4);
}
if (page == 5){
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("Aceton");
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("---------------------");
display.setTextSize(2);
display.setTextColor(WHITE, BLACK);
display.println(Aceton);
}
if (page == 6){
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(1);
display.setTextColor(WHITE, BLACK);
display.println("airQuality : ");
display.print(airQualityPercent);
display.println("%");
display.setTextSize(2);
display.println(airQualityLevel);
}
Serial.print("| "); Serial.print(CO);
Serial.print(" | "); Serial.print(Alcohol);
Serial.print(" | "); Serial.print(CO2 + 400);
Serial.print(" | "); Serial.print(Toluen);
Serial.print(" | "); Serial.print(NH4);
Serial.print(" | "); Serial.print(Aceton);
Serial.print(" | "); Serial.print(airQualityPercent); Serial.print("% (");
Serial.print(airQualityLevel); Serial.print(") |");
Serial.println();
display.display();
delay(500);
}
Learn more about our project.
Our Team
Pattrapol Yaowaraj
66070148
Pongpisut Tupwong
66070124
Petchpraethong inuthai
66070139
Pisit Ngamlertpatanasiri
66070136