Arduino UNO R4 Wi-Fi Project ideas!

UNO R4 WiFi has a built-in ESP32, so treat it as an ESP32 board. Whatever you can do using an ESP, you can do using UNO R4, even more. There's a catch though, finding appropriate libraries is very difficult since its a new board.

Here are some UNO R4 WiFi project ideas:

• Control lights, fans, or other home appliances through Wi-Fi using the board and relays.
• Build a system to monitor air quality (e.g., CO2 levels, particulate matter). The UNO can send data to the cloud or a local display.
• Create an automated irrigation system using soil moisture sensors to trigger water pumps based on soil conditions. You can control the system remotely using Wi-Fi.
• Build a robot that can be controlled via a smartphone or web browser.
• Build a smart doorbell that sends a notification or plays a sound on your phone when someone presses it.
• Use a PIR sensor to detect the presence. You can send an automated email once someone is detected.

All these projects are easy to build using the Arduino IoT cloud with the board. Learn how to get started with the Arduino IoT cloud tutorial here.

Here is the list of UNO R4 WiFi projects I found during my research:

1. Weather Station Using Arduino UNO R4 WiFi & Visuino
Build a weather station to monitor temperature, humidity, and pressure using sensors. The data is displayed and updated in real time using Visuino software.
Project Link: Weather Station Project

2. Arduino UNO R4 WiFi Experiments
Explore multiple small projects to familiarize yourself with the UNO R4 WiFi, including controlling the onboard LED matrix and creating simple WiFi apps.
Project Link: UNO R4 WiFi Experiments

3. Home Automation with Web Server
Set up a home automation system using a local web server hosted on the Arduino UNO R4 WiFi. Control home appliances remotely without relying on third-party IoT platforms.
Project Link: Home Automation System

4. LED Matrix Animations
Learn how to program the built-in 12x8 LED matrix on the UNO R4 WiFi to display custom animations and graphics. A great project for beginners to practice coding and LED control.
Project Link: LED Matrix Programming

5. Smartphone-like Device with Apps
Transform the Arduino UNO R4 WiFi into a smartphone-like device with multiple apps, a keyboard, and cloud sync. An innovative project showcasing the board's capabilities.
Project Link: Smartphone-like Device Project

6. SparkFun Qwiic Kit Integration
Connect various sensors and components using the SparkFun Qwiic Kit with the Arduino UNO R4 WiFi. This guide is ideal for experimenting with multiple peripherals.
Project Link: SparkFun Qwiic Kit Guide

P.S.:  I tried some of these not all.

There are a lot of ideas you can implement with the Arduino UNO R4 Wifi, depending on what you want to achieve. However, I have done a few projects that you can also try, ranging from beginner to advanced levels:

• Home Automation System
• Smart Door Lock
• IoT-Based Weather Station
• Wi-Fi-Controlled Robot
• Smart Irrigation System
• Wi-Fi-Enabled Data Logger
• Real-Time Air Quality Monitoring System
• Wi-Fi-Based Notification System

Since you’re eager to explore, here are some Arduino UNO R4 WiFi project ideas that take full advantage of its capabilities:

Beginner-Friendly Projects 

1. Wi-Fi Weather Dashboard – Connect a DHT22 or BMP280 sensor to measure temperature, humidity, and pressure, then display the data on a web interface.
2. Remote-Controlled LEDs – Create a simple web-based LED controller using the board’s Wi-Fi, allowing you to turn LEDs on/off from your phone.
3. Wireless Sensor Hub – Connect multiple sensors (LDR, temperature, gas) and send the data wirelessly to another device using MQTT.

Intermediate Projects 

4. IoT-Based Smart Lock – Use an RFID module or fingerprint sensor to control a servo-motorized lock, with access logs stored on a cloud database.
5. Real-Time Data Logger – Log sensor readings onto an SD card and simultaneously send them to Google Sheets or Thingspeak for remote tracking.
6. Smart Water Level Monitor – Attach ultrasonic sensors to a water tank and get alerts via Telegram or email when water levels drop.

Advanced Projects 

7. Home Automation with Voice Control – Integrate with Google Assistant or Alexa using ESP8266 API to control appliances via voice commands.
8. Gesture-Controlled IoT Device – Pair a gesture sensor with Wi-Fi connectivity to control appliances or robots using simple hand movements.
9. AI-Based Motion Detection – Use Edge Impulse to train an AI model that detects movement and triggers an alert, ideal for a DIY security system.
10. Arduino-Powered IoT Dashboard – Build a complete web-based dashboard to control and monitor multiple devices in real time.

With the UNO R4 WiFi, you can easily experiment with web-based control, IoT data visualization, and cloud integrations—no need for extra shields! What kind of project excites you the most? Let’s get building!