I2C Device Scanner Tool Kit with Arduino Uno
Build Your Own I2C Device Scanner with Arduino Uno – The Makers’ Essential Debug Tool
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Ever plugged in a new sensor only to wonder, “Is this thing even on the bus?” This kit turns your Arduino Uno into a handheld I2C address scanner that automatically probes all 127 possible addresses, identifies any connected device, and displays its hex address and common name on a 16×2 LCD. It’s the same debug tool seasoned makers keep on their bench – now yours to build in an afternoon.
What You'll Build
You’ll assemble a fully functional I2C scanner that cycles through addresses from 0x01 to 0x7F, reporting every device it finds with its standard I2C address. The result is a compact, battery-powered tool that saves hours of frustration when working with I2C OLEDs, sensors, ADCs, and expanders. Whether you’re troubleshooting a robotics project or verifying a new breakout board, your homemade scanner gives you instant clarity on which I2C addresses are occupied.
What You'll Learn
- Understand the I2C protocol – device addressing, ACK/NAK, and bus arbitration
- Interface a 16×2 LCD over I2C using the backback module
- Write Arduino code to scan all 127 addresses and name common I2C devices
- Read I2C device datasheets to confirm addresses for sensors, EEPROMs, and expanders
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| 4.7kΩ Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-F Wires | 20 |
| 9V Battery Snap | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Young tinkerers aged 8+ (with adult supervision) who are ready to move beyond blinking LEDs into real debugging tools. CBSE Class 9–10 students exploring Arduino basics, ATL Tinkering Lab teams that need a quick I2C address finder for sensor projects, and first-year B.Tech ECE/EEE students who want a practical introduction to serial protocols. It’s also a popular take-home project for Smart India Hackathon workshops and hobbyist clubs.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to chat with the AI companion trained on this exact kit. It can walk you through wiring, code upload, and troubleshooting. If you need a human, WhatsApp support is available 7 days a week.
Does this kit detect all I2C devices?
Yes, the Arduino sketch scans every address from 0x01 to 0x7F and reports any device that acknowledges. It also names many common ICs like the PCF8574, MPU6050, and SSD1306. Unlisted devices still show their hex address so you can match them to a datasheet.
Can I use this scanner with other microcontrollers later?
The I2C scanner logic is universal. Once you understand the Arduino code, you can adapt it to ESP32, Raspberry Pi, or STM32. The kit’s LCD and backpack can also be reused in other projects.
What if my LCD doesn’t display anything?
First, check the I2C backpack’s contrast trimpot. The AI companion will guide you through verifying connections and adjusting the potentiometer. If the issue persists, our WhatsApp team can help diagnose it, and we’ll replace any faulty part within 7 days.
Scans all 127 I2C addresses and displays found devices with address and name on LCD. Essential debug tool.
What's in this kit
- Arduino Uno R3
- 16x2 LCD
- I2C Backpack
- 4.7kΩ Resistors x5
- 400-pt Breadboard
- M-F Wires x20
- 9V Battery Snap
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items