Modernize Pet Safety with Open-Source Electronic Tags

Welcome to the future of pet identification! Your wireless rechargeable electronic tags are designed to keep your pets safe and easily identifiable, whether they are dogs or cats. And the best part? It's open source! Hosted, Monitored, and Managed free for public use by N.C. Professional Computer Services (www.NCPCS.com).

Explore the technology: Download STL file, Online Emulator, or Download Free Code

FREE or Low-Priced, Affordable for Pets We Care About

I originally built this electronic dog tag for my own pet, utilizing a microcontroller and a 128x32 i2C controlled OLED display. The device can be wirelessly programmed to display custom messages, such as my pet's name, address, contact details, and special instructions. There are two versions: one with a WEMOS D1 Mini for dogs and a smaller version using a XIAO ESP32C3 for cats. Both offer flexibility and functionality to suit different pets. Now, I want to share this project with others because I love pets, and I believe in making pet safety accessible to all.

Two sizes

Why Programmable Electronic Dog Tags?

Microchipping a dog typically costs between $35 and $60, with additional registration fees. Our open-source electronic tags offer a modern, reusable, almost-free alternative.

Time to create, maybe a pet tag that could be great.
Small and cheap, about 160 dimes, Keeps your pet safe, saves precious time. Rechargeable, easy to see, For dogs or cats, be more worry-free!


Open Source Innovation for All

By embracing open-source principles, we foster a community of innovators to continually improve this product. This collaborative approach ensures rapid advancements, better security, and a feature-rich experience. Open source allows for transparency and trust, giving pets better protection and owners even more peace of mind.

We believe in inclusivity and providing opportunities for everyone. That's why we offer a free DIY version for those who want to build it themselves. For those who prefer a ready-made solution, we offer a premium assembled version with the latest approved code.

Programmable Dog Tag

Product Options

We offer two options for our electronic tags:

Designed to fit on any collar, making it versatile and easy to use. The hardware utilizes an affordable XIAO ESP32C3, a switch for power (if a battery is used), a 1" i2C OLED for displaying messages, and a 3D printed enclosure. The cat model is the same device in a smaller enclosure, without a battery or switch to save weight.

Why Upgrade from RFID? Love for your PET..!

Technology has evolved significantly over the past 40 years:

Similarly, pet identification should benefit from modern technology. RFID tags are outdated and limited. Our open-source electronic tags provide enhanced functionality and convenience.

Customizability and Versatility

Small electronic tags can be reprogrammed for various uses beyond pet identification, such as programmable luggage tags or dynamic grocery lists.

Enhanced Visibility and Safety

The illuminated display makes it easier to spot pets, even in low light conditions. Custom messages provide immediate, actionable information to anyone who finds your pet.

Redundancy and Reliability

As a matter of redundancy smart pet owners use both RFID and a Programmable Pet tag. With a built-in USB charging port, assembled tags offer long-term functionality. If the battery depletes, plugging into USB will reliably run the message programmed, while charging. Simply charge to restore the battery, ensuring continuous illumination.

Environmentally Friendly

RFID tags, once implanted, are not reusable, and if the pet passes away, the investment is lost. Programmable electronic tags, however, are reprogrammable and reusable, making them a more sustainable choice.

Technical Specifications

Both Electronic Dog/Cat tags assembled like this:

  1. WiFi Setup and Handling: Sets up an access point using an ESP32, with a web server for text updates and WiFi management.
  2. EEPROM: Stores settings such as display text, display time, text size, and WiFi disable option. Handles initialization, loading, and saving of settings.
  3. Display Handling: Uses Adafruit_SSD1306 library to manage the i2C OLED display, displaying text on the 128x32 1" OLED in 3 different sizes for user-specified durations.
  4. Web Server: Serves the HTML form for user input, handles form submissions to update display settings, and includes a checkbox to disable WiFi after 5 minutes for power saving.

At 4.7 grams for the Cat tag without Battery or switch, Re-chargeable Dog Tag only 15.2 grams

Electronic Dog Tag
Both not much bigger than a couple of quarters.
Programmable Dog Tag