Arduino Nano with DHT11 Sensor & OLED Display | KitKraft Temperature and Humidity Monitoring Project

In this tutorial, we’ll guide you through creating a simple temperature and humidity monitoring system using an Arduino Nano, a DHT11 sensor, and an OLED display. This project is perfect for beginners looking to understand how to interface sensors with Arduino and display the data in real-time.

Why Choose This Project?

Monitoring temperature and humidity is essential in many applications, from home automation to greenhouse management. With affordable components, this project allows you to explore how sensors can interact with microcontrollers to provide crucial environmental data.

Components Needed

• Arduino Nano
• DHT11 Sensor Module (provides temperature and humidity data)
• 0.96-inch OLED Display (for real-time readings)
• Connecting Wires
• Breadboard

Why DHT11 Sensor?

The DHT11 is a reliable and inexpensive sensor that measures both temperature and humidity, making it ideal for basic environmental monitoring projects. Additionally, because the DHT11 module includes all necessary pull-up resistors internally, you don't need an external 4.7 kΩ resistor for this setup.

Project Overview

This project involves connecting the DHT11 sensor to an Arduino Nano, reading temperature and humidity data, and displaying the readings on an OLED display. It’s a simple project that teaches core concepts like sensor interfacing, I2C communication for the OLED, and working with libraries.

Steps to Build the Project

1. Wiring the Components

   • DHT11 Connections:
     • VCC to Arduino 5V
     • GND to Arduino GND
     • Data Pin to Arduino Digital Pin 2
   • OLED Display Connections:
     • VCC to 3.3V
     • GND to GND
     • SCL to Arduino A5 (SCL)
     • SDA to Arduino A4 (SDA)

2. Installing Libraries You’ll need two libraries for this project:

   • DHT Sensor Library (for the DHT11 sensor)
   • Adafruit SSD1306 and GFX Library (for OLED display)

3. Coding the Project In the Arduino IDE, include the necessary libraries and write code to:

   • Initialize the DHT11 sensor.
   • Read temperature and humidity data.
   • Display the data on the OLED screen in real-time.

Testing the Setup

Upload the code to your Arduino Nano, and within seconds, you should see the temperature and humidity readings displayed on the OLED screen. You can test the sensor by blowing warm air near it or placing it in different environments to watch the values change.

YouTube Shorts

Check out our quick video demo of the project here:

YouTube Shorts: Arduino Nano with DHT11 Sensor & OLED Display
#kitkraftindia

GitHub Repository

Get the complete code and schematic for this project on GitHub:

GitHub: Arduino Nano with DHT11 & OLED Display Project

Applications

• Home Environment Monitoring: Use this project to monitor room conditions.
• Greenhouse Monitoring: Maintain the right conditions for your plants.
• Weather Stations: Incorporate this project into a larger weather station setup.

Final Thoughts

This project is a great introduction to interfacing sensors with Arduino. By the end of this project, you will have a functional temperature and humidity monitoring system with real-time display output. Feel free to experiment with other sensors or expand the project further to suit your needs.

Stay tuned to KitKraft for more exciting Arduino projects and kits!