ESP32 তে টেম্পারেচার এবং হিউমিডিটি সেন্সর নিয়ে কাজ করা

#include <Arduino.h>
#include <DHT.h>

#define DHTPIN 15
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();
}

void loop() {
  delay(2000); // Wait 2 seconds between readings

  float humidity = dht.readHumidity();
  float tempC = dht.readTemperature();

  if (isnan(humidity) || isnan(tempC)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print("% | Temp: ");
  Serial.print(tempC);
  Serial.println(" °C");
}

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>

// OLED Screen Setup
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_SDA 21
#define OLED_SCL 22
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3C // 0x3C standard address for SSD1306

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// DHT11 Sensor Setup
#define DHTPIN 15
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);

  // Initialize DHT sensor
  dht.begin();

  // Initialize I2C for OLED (SDA=21, SCL=22)
  Wire.begin(OLED_SDA, OLED_SCL);

  // Initialize OLED display
  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println("OLED initialization failed!");
  } else {
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(0, 0);
    display.println("Initializing...");
    display.display();
  }
}

void loop() {
  delay(2000); // DHT11 requires 2 seconds between readings

  float humidity = dht.readHumidity();
  float tempC = dht.readTemperature();

  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);

  // Title Header
  display.setTextSize(1);
  display.setCursor(0, 0);
  display.println("DHT11 Weather Monitor");
  display.println("---------------------");

  if (isnan(humidity) || isnan(tempC)) {
    display.setCursor(0, 25);
    display.println("Sensor Error!");
    Serial.println("Failed to read from DHT sensor!");
  } else {
    // Temperature Display
    display.setCursor(0, 24);
    display.setTextSize(1);
    display.print("Temp: ");
    display.setTextSize(2);
    display.print(tempC, 1);
    display.setTextSize(1);
    display.println(" C");

    // Humidity Display
    display.setCursor(0, 46);
    display.setTextSize(1);
    display.print("Humi: ");
    display.setTextSize(2);
    display.print(humidity, 1);
    display.setTextSize(1);
    display.println(" %");

    // Console output
    Serial.print("Temp: ");
    Serial.print(tempC);
    Serial.print(" °C | Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");
  }

  display.display();
}