ส่งงานครั้งที่ 17

Air Pollution Monitoring

อุปกรณ์

• MQ135 Gas sensor
• Arduino Uno
• Wi-Fi module ESP8266
• 16X2 LCD
• Breadboard
• 10K potentiometer
• 1K ohm resistors
• 220 ohm resistor
• Buzzer

Diagram

Code

#include "MQ135.h"
#include <SoftwareSerial.h>
#define DEBUG true
SoftwareSerial esp8266(9,10); // กำหนดขา 9 ของ Arduino เป็น RX pin และ ขา 10 ของ Arduino เป็น the TX pin
const int sensorPin= 0;
int air_quality;
#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11, 5, 4, 3, 2);

void setup() {
pinMode(8, OUTPUT);
lcd.begin(16,2);
lcd.setCursor (0,0);
lcd.print ("circuitdigest ");
lcd.setCursor (0,1);
lcd.print ("Sensor Warming ");
delay(1000);
Serial.begin(115200);
esp8266.begin(115200);
  sendData("AT+RST\r\n",2000,DEBUG); // reset module
  sendData("AT+CWMODE=2\r\n",1000,DEBUG); // กำหนดค่า  access point
  sendData("AT+CIFSR\r\n",1000,DEBUG); // รับ ip address
  sendData("AT+CIPMUair_quality=1\r\n",1000,DEBUG); // กำหนดค่าสำหรับการเชื่อมต่อหลายตัว
  sendData("AT+CIPSERVER=1,80\r\n",1000,DEBUG); // เปิด server บน port 80
pinMode(sensorPin, INPUT);        //Gas sensor จะเป็น input ของ arduino
lcd.clear();
}

void loop() {

MQ135 gasSensor = MQ135(A0);
float air_quality = gasSensor.getPPM();

if(esp8266.available()) // เช็คถ้าespส่งข้อความ
  {
    if(esp8266.find("+IPD,"))
    {
     delay(1000);
     int connectionId = esp8266.read()-48;
     String webpage = "<h1>IOT Air Pollution Monitoring System</h1>";
       webpage += "<p><h2>";  
       webpage+= " Air Quality is ";
       webpage+= air_quality;
       webpage+=" PPM";
       webpage += "<p>";
     if (air_quality<=1000)
{
  webpage+= "Fresh Air";
}
else if(air_quality<=2000 && air_quality>=1000)
{
  webpage+= "Poor Air";
}

else if (air_quality>=2000 )
{
webpage+= "Danger! Move to Fresh Air";
}

webpage += "</h2></p></body>";
     String cipSend = "AT+CIPSEND=";
     cipSend += connectionId;
     cipSend += ",";
     cipSend +=webpage.length();
     cipSend +="\r\n";
   
     sendData(cipSend,1000,DEBUG);
     sendData(webpage,1000,DEBUG);
   
     cipSend = "AT+CIPSEND=";
     cipSend += connectionId;
     cipSend += ",";
     cipSend +=webpage.length();
     cipSend +="\r\n";
   
     String closeCommand = "AT+CIPCLOSE=";
     closeCommand+=connectionId; // append connection id
     closeCommand+="\r\n";
   
     sendData(closeCommand,3000,DEBUG);
    }
  }

lcd.setCursor (0, 0);
lcd.print ("Air Quality is ");
lcd.print (air_quality);
lcd.print (" PPM ");
lcd.setCursor (0,1);
if (air_quality<=1000)
{
lcd.print("Fresh Air");
digitalWrite(8, LOW);
}
else if( air_quality>=1000 && air_quality<=2000 )
{
lcd.print("Poor Air, Open Windows");
digitalWrite(8, HIGH );
}
else if (air_quality>=2000 )
{
lcd.print("Danger! Move to Fresh Air");
digitalWrite(8, HIGH);   // turn the LED on
}
lcd.scrollDisplayLeft();
delay(1000);
}
String sendData(String command, const int timeout, boolean debug)
{
    String response = "";
    esp8266.print(command); //ส่งค่าที่อ่านได้ให้ esp8266
    long int time = millis();
    while( (time+timeout) > millis())
    {
      while(esp8266.available())
      {
        // The esp has data so display its output to the serial window
        char c = esp8266.read(); // อ่านค่าถัดไป
        response+=c;
      }
    }
    if(debug)
    {
      Serial.print(response);
    }
    return response;
}

Credit By  : https://circuitdigest.com/microcontroller-projects/iot-air-pollution-monitoring-using-arduino