Enviornment Monitor

/* OK Standalone April 16, 2023 */

#include "Free_Fonts.h"
#include "Adafruit_PM25AQI.h"
int pm25value = 0;
int pm25envvalue = 0;
uint16_t BreakPointColor = 0;
int offset = 5;  //used to shift the Legend right

const float AQI_BREAKPOINTS[8] = {0, 12.1, 35.5, 55.5, 150.5, 250.5, 350.5, 500.5};
const int AQI_INDEX[8] = {0, 50, 100, 150, 200, 300, 400, 500};
float pm25 = 0.0; // store PM2.5 value here
float pm25std = 0.0;  //test only
int aqinew = 0;
char tempstring[8];  // Sh000 "S"=start, h=h/t/p

#include "DHT.h"
#define DHTPIN D0     // what digital pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);

#include <SoftwareSerial.h>
SoftwareSerial pmSerial(D1, D2);  //D1 RECEIVE DATA FROM PMS7003
Adafruit_PM25AQI aqi = Adafruit_PM25AQI();
#include"TFT_eSPI.h"
TFT_eSPI tft;

float t = 0;  //temperature C
float h = 0;  //humidity %
float f = 0;  //temperature F

void setup() {
    BreakPointColor = TFT_GREEN;
    pinMode(D0,INPUT);
    dht.begin();
    Serial.begin(38400);
//    while (!Serial) delay(10);

    pmSerial.begin(9600);
    if (! aqi.begin_UART(&pmSerial)) { // connect to the sensor over software serial
    //Serial.println("Could not find PM 2.5 sensor!");
    while (1) delay(10);
  }
    tft.begin();
    tft.setRotation(3);

    drawborders();
    drawlegend();

   delay(1000);
   //Serial.println("PM25 found!");

}

void loop() {
    tft.fillRect(2,10,70,45,TFT_BLACK);

    tft.setTextColor(BreakPointColor);           //sets the text colour to yellow
    tft.setFreeFont(FSS18);  //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString(String(pm25envvalue) , 10, 18,GFXFF);
delay(100);
    tft.fillRect(83,10,70,50,TFT_BLACK);
    tft.setTextColor(BreakPointColor);           //sets the text colour to yellow
    tft.setFreeFont(FSS18);
    tft.drawString(String(aqinew) , 90, 20,GFXFF);
delay(100);
    readdht22();  //t = temperature h = humidity
    readpms7003();
// TEMP/HUM BOX
    tft.fillRect(2,68,74,28,TFT_BLACK);
    tft.setTextColor(TFT_YELLOW);            //sets the text colour to green
    tft.setFreeFont(FSS9);
    tft.drawString(String(t) +"c" , 8, 72,GFXFF);
delay(100);
    tft.fillRect(85,68,74,28,TFT_BLACK);
    tft.setTextColor(TFT_YELLOW);            //sets the text colour to green
    tft.setFreeFont(FSS9);
    tft.drawString(String(h)+"%" , 85, 72,GFXFF);

    delay(1000);
}

void drawborders() {
    tft.fillScreen(TFT_BLACK);
    tft.drawRect(0,0,160,64,TFT_GREEN);
    tft.drawLine(80, 0, 80, 63, TFT_GREEN);
    //TEMP/HUM BOX
    tft.drawRect(0,66,160,32,TFT_BLUE);
    tft.drawLine(80, 66, 80, 64+32, TFT_BLUE);

    tft.setTextColor(TFT_WHITE);           //sets the text colour to yellow
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("PM2.5 ug/m^3" , 3, 3,GFXFF);
    tft.drawString("AQI(PM2.5)" , 82, 3,GFXFF);
    //TEMP/HUM LABELS
    /*tft.setTextColor(TFT_WHITE);           //sets the text colour to yellow
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("TEMP" , 3, 64,GFXFF);
    tft.drawString("HUM %)" , 82, 64,GFXFF);
    */
    //delay(5000);

}

void drawlegend() {
 // Draw legend
    // GOOD
    tft.fillRect(0+offset,100,30,20,TFT_GREEN);
    tft.setTextColor(TFT_BLACK);           //sets the text colour to black
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("GOOD" , 2+offset, 105,GFXFF);
    //MODERATE
    tft.fillRect(30+offset,100,22,20,TFT_YELLOW);
    tft.setTextColor(TFT_BLACK);           //sets the text colour to black
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("MOD" , 32+offset, 105,GFXFF);
    //SENSITIVE
    tft.fillRect(52+offset,100,24,20,TFT_ORANGE);
    tft.setTextColor(TFT_BLACK);           //sets the text colour to yellow
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("SEN" , 56+offset, 105,GFXFF);
    //UNHEALTHY
    tft.fillRect(76+offset,100,24,20,TFT_RED);
    tft.setTextColor(TFT_BLACK);           //sets the text colour to yellow
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("UNH" , 80+offset, 105,GFXFF);
    //VERY UNHEALTHY
    tft.fillRect(100+offset,100,24,20,TFT_PURPLE);
    tft.setTextColor(TFT_WHITE);           //sets the text colour to yellow
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("VER" , 104+offset, 105,GFXFF);
    //HAZARDOUS
    tft.fillRect(124+offset,100,24,20,TFT_BROWN);
    tft.setTextColor(TFT_WHITE);           //sets the text colour to yellow
    tft.setFreeFont(NULL);                 //FF18=FreeSans12pt7b  FMB12=FreeMonoBold12pt7b FSS18=FreeSans18pt7b
    tft.drawString("HAZ" , 128+offset, 105,GFXFF);

}
void readdht22(){
  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  f = dht.readTemperature(true);

//  Serial.print("Sh");
//  Serial.printf("%00.2f",h);
  //Serial.println();

//  Serial.print("St");
//  Serial.printf("%00.2f",t);
  //Serial.println();

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    //Serial.println("Failed to read from DHT sensor!");
    return;
  }

}

void readpms7003() {
  PM25_AQI_Data data;

  if (! aqi.read(&data)) {
    //Serial.println("Could not read from AQI");
    delay(500);  // try again in a bit!
    return;
  }
  //Serial.println("AQI reading success");

  pm25value = data.pm25_standard;
  pm25envvalue = data.pm25_env;
  convertpm25toaqi();
  Breakpoints();
}

void convertpm25toaqi() {
    // read PM2.5 value from sensor
  pm25 = pm25envvalue; // read PM2.5 value from sensor (replace with your code to read sensor data)
  //pm25std = pm25value;
  // convert PM2.5 value to AQI
  //int aqi = 0;
  for (int i = 0; i < 8; i++) {
    if (pm25 >= AQI_BREAKPOINTS[i] && pm25 <= AQI_BREAKPOINTS[i+1]) {
      aqinew = (AQI_INDEX[i+1] - AQI_INDEX[i]) / (AQI_BREAKPOINTS[i+1] - AQI_BREAKPOINTS[i]) * (pm25 - AQI_BREAKPOINTS[i]) + AQI_INDEX[i];
      break;
    }
  }

  // print all values
  Serial.print("p");
  sprintf(tempstring,"%05d",pm25envvalue);
  Serial.print(tempstring);

  Serial.print("h");
  Serial.printf("%00.2f",h);

  Serial.print("t");
  Serial.printf("%00.2f",t);

/*  Serial.print("STD: ");  //test only
  sprintf(tempstring,"%05d",pm25value);
  Serial.println(tempstring);
  Serial.print("Env: ");  //test only
  sprintf(tempstring,"%05d",pm25envvalue);
  Serial.print(tempstring);
  //Serial.println();
*/
}

void Breakpoints(){
  if(pm25 <= 12){
     BreakPointColor = TFT_GREEN;
  }else if(pm25 <= 35){
     BreakPointColor = TFT_YELLOW;
  }else if(pm25 <= 55){
     BreakPointColor = TFT_ORANGE;
  }else if(pm25 <= 150){
     BreakPointColor = TFT_RED;
  }else if(pm25 <= 250){
      BreakPointColor = TFT_PURPLE;
  }else{
     BreakPointColor = TFT_BROWN;
  }
}