DHT11 Sensor 0.91 inch OLED Arduino TFT LCD | ESP32 IoT Project | All in Hindi

DHT11 Sensor 0.91 inch OLED Arduino TFT LCD | ESP32 IoT Project | All in Hindi

Code & Connection

We can change Data Pin of DHT11 according to our convenient.

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#include <DHT.h>

#define OLED_RESET    -1

Adafruit_SSD1306 display(OLED_RESET);

#define DHTPIN 4     // Pin where the DHT11 is connected

#define DHTTYPE DHT11 // DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {

  Serial.begin(9600);

  // Initialize the OLED display with I2C address 0x3C (for the 128x64)

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {

    Serial.println(F("SSD1306 allocation failed"));

    for(;;);

  }

  // Initialize DHT sensor

  dht.begin();

}

void loop() {

  // Reading temperature or humidity takes about 250 milliseconds!

  float humidity = dht.readHumidity();

  float temperature = dht.readTemperature(); // Celsius

  // Check if any reads failed and exit early (to try again).

  if (isnan(humidity) || isnan(temperature)) {

    Serial.println(F("Failed to read from DHT sensor!"));

    return;

  }

  // Clear the display

  display.clearDisplay();

  // Display temperature and humidity on OLED

  display.setTextSize(1);

  display.setTextColor(SSD1306_WHITE);

  display.setCursor(0,0);

  display.print("Temperature: ");

  display.println(temperature);

  display.print("Humidity: ");

  display.println(humidity);

  display.display();

  delay(2000); // Delay to avoid flooding the display with updates

}