Introduction: DHT11 Temperature and Humidity Sensor Using Arduino With LCD Display Tutorial

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this is a simple project

You can understand the basics of the LCD with I2C and also how to find temperature and humidity of the room.

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Attachments

Step 1: Components Needed

The things i have used in this project is

Arduino uno

DHT11 sensor

LCD with I2C module

Jumperwires

Breadboard

Step 2: Circuit Diagram

Step 3: Arduino CODE

#include #include #include // for DHT11, // VCC: 5V or 3V // GND: GND // DATA: 3 int pinDHT11 = 3; SimpleDHT11 dht11(pinDHT11); LiquidCrystal_I2C lcd(0x27, 16, 2); void setup() { Serial.begin(115200); } void loop() { // start working... Serial.println("================================="); Serial.println("Sample DHT11..."); // read without samples. byte temperature = 0; byte humidity = 0; int err = SimpleDHTErrSuccess; if ((err = dht11.read(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) { Serial.print("Read DHT11 failed, err="); Serial.println(err);delay(1000); return; } lcd.begin(); // Turn on the blacklight and print a message. lcd.backlight(); lcd.print("tempature "); lcd.print((int)temperature); lcd.setCursor(0, 1); lcd.print("humidity "); lcd.print((int)humidity); delay(1000); }

Step 4: NOTE

YOU SHOULD DOWNLOAD SIMPLEDHT LIBRARY TO GET THE PROJECT WORK CORRECTLY