Enviornment Monitoring Station

#include <Wire.h>
#include "SSD1306Ascii.h"
#include "SSD1306AsciiWire.h"
#include <Adafruit_Sensor.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
SSD1306AsciiWire oled;

#include <DHT.h>
#define DHTPIN 23  // pin for Dustation Devkit v1.4
float t;
float h;
char buffer[10];

#include "PMS.h"
PMS pms(Serial2);
PMS::DATA data;
float pm2;

//#define DHTTYPE    DHT11     // DHT 11
#define DHTTYPE    DHT22     // DHT 22 (AM2302)
//#define DHTTYPE    DHT21     // DHT 21 (AM2301)
#define I2C_ADDRESS 0x3C

DHT dht(DHTPIN, DHTTYPE);

void setup() {
   Serial2.begin(9600);
   Serial.begin(38400);
   dht.begin();
   Wire.begin();
   Wire.setClock(400000L);
   oled.begin(&Adafruit128x64, I2C_ADDRESS);
   oled.setFont(Verdana12);   //Arial14
   oled.clear();
   oled.setCursor(0,0); //(col,row)
   //oled.set2X();

  delay(2000);
}

void loop() {
  //delay(5000);

  int AQI;
  String state;

  if (pms.read(data))
  {
    pm2 = data.PM_AE_UG_2_5;

    /*Serial.print("PM 1.0 (ug/m3): ");
    Serial.println(data.PM_AE_UG_1_0);

    Serial.print("PM 2.5 (ug/m3): ");
    Serial.println(data.PM_AE_UG_2_5);

    Serial.print("PM 10.0 (ug/m3): ");
    Serial.println(data.PM_AE_UG_10_0);

    Serial.println();

    Serial.print(t);
    Serial.println("C");
    Serial.print(h);
    Serial.println("%");
    Serial.println();
    */

    am2302();

    oledupdate();
    getAQI(pm2, &AQI, &state);

  }
}

  void am2302() {

  //read temperature and humidity
  t = dht.readTemperature();
  h = dht.readHumidity();
  if (isnan(h) || isnan(t)) {
    Serial.println("AM2302 Failed");
  }
}

  void oledupdate() {
  delay(1000);
  // clear display
  //oled.clear();

  // display temperature
   oled.setCursor(1,0); //(col,row)
  // oled.clearToEOL();
   //oled.set2X();
   oled.print(t);
   oled.println("C");

   oled.setCursor(1,10); //(col,row)
   //oled.set2X();
   oled.print(h);
   oled.println("%");

   oled.setCursor(1,20); //(col,row)
   //oled.set2X();
   oled.print(" PM2.5 = ");
   int pm2temp = pm2;
   oled.println(pm2temp);
  }

void getAQI(float pm25, int* aqi, String* state){
  int aqitemp;
  String statetemp;

  // aqi = Ilow + (C-Clow)*(Ihigh-Ilow)/(Chigh-Clow) with I=aqi and C=concentration
  if(pm25 < 12){
      *aqi = 0 + (pm25-0)*(50.0-0)/(12-0);
      *state = "Good";
      aqitemp = *aqi;
      statetemp = *state;
  }else if(pm25 < 35){
      *aqi = 51 + (pm25-13)*(100.0-51)/(35-13);
      *state = "MOD";
      aqitemp = *aqi;
      statetemp = *state;
  }else if(pm25 < 55){
      *aqi = 101 + (pm25-36)*(150.0-101)/(55-36);
      *state = "UHS";
       aqitemp = *aqi;
       statetemp = *state;
 }else if(pm25 < 150){
      *aqi = 151 + (pm25-56)*(200.0-151)/(150-56);
      *state = "UH";
      aqitemp = *aqi;
      statetemp = *state;
  }else if(pm25 < 250){
      *aqi = 201 + (pm25-151)*(300.0-201)/(250-151);
      *state = "Very UH";
      aqitemp = *aqi;
      statetemp = *state;
  }else{
      *aqi = 300 + (pm25-250)*(500.0-300)/(500-250);
      *state = "HAZ";
      aqitemp = *aqi;
      statetemp = *state;
  }
   oled.setCursor(1,30); //(col,row)
   oled.clearToEOL();
  //oled.set2X();
   oled.print(" AQI = ");
   oled.print(aqitemp);
   oled.print("  ");
   oled.println(statetemp);
   Serial.println(aqitemp);



}