Wiznet makers

Flipper Zero Ethernet Network Testing Module with W5500

Introduction

Hello everyone, today I will introduce the Flipper Zero Ethernet Network Testing Module with W5500.

Flipper Zero is a multi-tool device for security researchers, makers, and pentesters. It integrates multiple interfaces such as RFID/NFC, infrared, sub-GHz radio, and GPIO, and is widely used for IoT debugging, wireless hacking, and educational experiments.

Background

In the past, many developers experimented with adding Ethernet connectivity to Flipper Zero by wiring a W5500 Lite board on a breadboard. These DIY attempts were often shared in maker communities and generated significant attention because they enabled simple ping tests, DHCP IP assignment, and packet inspection directly from Flipper Zero.

For example, tutorials in late 2024 demonstrated how to connect Flipper to a local network using an external W5500 module via RJ-45, confirming DHCP leases and sending ping packets. This showed the potential of wired Ethernet on Flipper Zero, but the solutions remained bulky and fragile due to hand-wiring and breadboard limitations.

New Product (2024 Release)

In 2024, these community efforts led to the release of a dedicated Ethernet Network Testing Module for Flipper Zero, based on the WIZnet W5500 chip.

Key Advantages:

Hardware TCP/IP stack (W5500): Offloads the microcontroller, providing reliable and fast Ethernet processing compared to software-based stacks.

Plug-and-Play: No soldering or breadboards required. Just connect via RJ-45 and instantly run diagnostics such as DHCP IP display, ping testing, and MAC spoofing.

DIY Expansion Area: The PCB includes a perforated zone where users can solder sensors, LEDs, or other peripherals to extend functionality.

Community-Driven Evolution: This module was developed as a direct response to the high interest and repeated DIY projects around Flipper Zero + W5500, but now provides a professional, ready-to-use form factor.

Use Cases

Network diagnostics: Checking cable connectivity, IP assignment, and latency.

Security research: Testing network configurations, spoofing MAC addresses.

Education and hackathons: Quick Ethernet experimentation in classrooms or competitions.

IoT debugging: Providing wired network visibility alongside wireless tools already available on Flipper Zero.

Conclusion

To summarize:
Flipper Zero was originally a wireless hacking and debugging tool, but with this 2024 W5500 Ethernet module, it now becomes a complete portable network diagnostic device.

This is a great example of how community interest and repeated DIY projects evolved into an official hardware product, offering both stability and extensibility.

Thank you.

References

Awesome Flipper – Ethernet Troubleshooter app for W5500
https://awesome-flipper.com/application/lab.flipper.net/gpio/eth_troubleshooter

GitHub – fz-eth-troubleshooter (Flipper + W5500 project)
https://github.com/arag0re/fz-eth-troubleshooter

Tekkix – “Testing a Local Computer Network and the Internet with Flipper Zero and W5500” (2024, Dec)
https://tekkix.com/articles/diy/2024/12/testing-a-local-computer-network-and-the-int

Tindie – Flipper Zero Ethernet Network Testing Module product page
https://www.tindie.com/products/yihang/flipper-zero-ethernet-network-testing-module

Flipper Zero general introduction – Wikipedia
https://en.wikipedia.org/wiki/Flipper_Zero