#include <Adafruit_CircuitPlayground.h>
#include <Adafruit_Circuit_Playground.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeSans9pt7b.h>
#include <Fonts/FreeMonoOblique9pt7b.h>
#include <DHT.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET 4 // Reset pin # (or -1 if sharing Arduino reset pin)
#define Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#define sensor A0;
#define DHTPIN 2 // Digital pin 2
#define DHTTYPE DHT11; // DHT 11
#define int gasLevel = 0; //int variable for gas level
#define String quality ="";
#define DHT dht(DHTPIN, DHTTYPE);
#define void sendSensor()
{
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
display.setTextColor(WHITE);
display.setTextSize(1);
display.setFont();
display.setCursor(0, 43);
display.println("Temp :");
display.setCursor(80, 43);
display.println(t);
display.setCursor(114, 43);
display.println("C");
display.setCursor(0, 56);
display.println("RH :");
display.setCursor(80, 56);
display.println(h);
display.setCursor(114, 56);
display.println("%");
}
void air_sensor()
{
gasLevel = analogRead(sensor);
if(gasLevel<181){
quality = " GOOD!";
}
else if (gasLevel >181 && gasLevel<225){
quality = " Poor!";
}
else if (gasLevel >225 && gasLevel<300){
quality = "Very bad!";
}
else if (gasLevel >300 && gasLevel<350){
quality = "ur dead!";
}
else{
quality = " Toxic";
}
display.setTextColor(WHITE);
display.setTextSize(1);
display.setCursor(1,5);
display.setFont();
display.println("Air Quality:");
display.setTextSize(1);
display.setCursor(20,23);
display.setFont(&FreeMonoOblique9pt7b);
display.println(quality);
}
void setup() {
Serial.begin(9600);
pinMode(sensor,INPUT);
dht.begin();
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3c)) { // Address 0x3D for 128x64
Serial.println(F("SSD1306 allocation failed"));
}
display.clearDisplay();
display.setTextColor(WHITE);
display.setTextSize(2);
display.setCursor(50, 0);
display.println("Air");
display.setTextSize(1);
display.setCursor(23, 20);
display.println("Qulaity monitor");
display.display();
delay(1200);
display.clearDisplay();
display.setTextSize(2);
display.setCursor(20, 20);
display.println("BY Abid");
display.display();
delay(1000);
display.clearDisplay();
void loop() {
display.clearDisplay();
air_sensor();
sendSensor();
display.display();
}
There is an error message on the line: "void setup () {". The error message says "expected constructor, destructor or type conversion before ";" token. It's on the arduino IDE, not c++.
