electronic projects - Air Quality meter final edition

CODE

#include "Adafruit_CCS811.h"

Adafruit_CCS811 ccs;

#include <SPI.h>

#include <Wire.h>

#include <Adafruit_GFX.h> // Adafruit core graphics library

#include <Adafruit_ST7789.h> // Adafruit hardware-specific library for ST7789

int buttonPin = 2;

int led3 = 3;

int led1R = 4;

int led1B = 5;

int led1G = 6;

int TX = 7;

// ST7789 TFT module connections

#define TFT_CS 10 // define chip select pin

#define TFT_DC 8 // define data/command pin

#define TFT_RST 9 // define reset pin, or set to -1 and connect to Arduino RESET pin

// initialize Adafruit ST7789 TFT library with hardware SPI module

// MOSI(SDA) ---> Arduino digital pin 11

// SCK (SCL) ---> Arduino digital pin 13

Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);

void setup(void) {

// Defining the button pin as input

pinMode(buttonPin, INPUT);

// Defines the green LED as output

pinMode(led3, OUTPUT);

pinMode(led1R, OUTPUT);

pinMode(led1B, OUTPUT);

pinMode(led1G, OUTPUT);

pinMode(TX, OUTPUT);

Serial.begin(9600); // sets the serial port to 9600

Serial.println("CCS811 test");

if(!ccs.begin()){

Serial.println("Failed to start sensor! Please check your wiring.");

while(1);

}

//calibrate

while(!ccs.available());

float temp = ccs.calculateTemperature();

ccs.setTempOffset(temp - 25.0);

// Wait for the sensor to be ready

while(!ccs.available());

// initialize the ST7789 display (240x240 pixel)

// if the display has CS pin try with SPI_MODE0

tft.init(240, 240, SPI_MODE2);

// if the screen is flipped, remove this command

tft.setRotation(3);

// fill the screen with black color

tft.fillScreen(ST77XX_BLACK);

tft.setTextColor(ST77XX_WHITE, ST77XX_BLACK);

tft.setCursor(15, 0);

tft.setTextSize(3);

tft.print("AIR QUALITY");

tft.setTextColor(ST77XX_WHITE, ST77XX_BLACK);

tft.setCursor(15, 20);

tft.setTextSize(3);

tft.print("__________");

tft.setTextColor(ST77XX_YELLOW, ST77XX_BLACK);

tft.setCursor(15, 50);

tft.setTextSize(2);

tft.print("CO2:");

tft.setCursor(140, 140);

tft.setTextSize(2);

tft.print("ppm");

tft.setTextColor(ST77XX_WHITE, ST77XX_BLACK);

tft.setCursor(15, 145);

tft.setTextSize(3);

tft.print("_______");

tft.setTextColor(ST77XX_YELLOW, ST77XX_BLACK);

tft.setCursor(15, 174);

tft.setTextSize(2);

tft.print("TVOC:");

tft.setCursor(140, 210);

tft.setTextSize(2);

tft.print("ppm");

digitalWrite(led1R, LOW);

digitalWrite(led1B, LOW);

digitalWrite(led1G,LOW);

digitalWrite(TX, LOW);

digitalWrite(led3, LOW);

delay(200);

}

void loop() {

digitalWrite(led3, LOW);

digitalWrite(led1R, LOW);

if (digitalRead(buttonPin)==HIGH)

digitalWrite(led3, HIGH);

if(ccs.available()){

if(!ccs.readData()){

float temp = ccs.calculateTemperature();

if(!ccs.readData()){

Serial.print("CO2: ");

Serial.print(ccs.geteCO2());

Serial.print("TVOC: ");

Serial.println(ccs.getTVOC());

tft.fillRect(135,60,60,80,ST77XX_BLACK);

tft.fillRect(20,200,110,70,ST77XX_BLACK);

tft.setTextColor(ST77XX_WHITE, ST77XX_BLACK);

tft.setCursor(10, 80);

tft.setTextSize(7);

tft.println(ccs.geteCO2());

tft.setCursor(15, 200);

tft.setTextSize(5);

tft.println(ccs.getTVOC());

tft.fillRect(200,30,30,25,ST77XX_GREEN),digitalWrite(led1G, HIGH);

if (ccs.geteCO2 () > 600)tft.fillRect(200,30,30,25,ST77XX_BLACK),digitalWrite(led1G, HIGH);

tft.setCursor(10, 200);