Network-tester---PICO-W5500
Small battery powered network tester using WIZnet W5500-EVB-Pico and 1.3" OLED Display HAT
🧪 Pocket Network Tester – Powered by W5500-EVB-Pico2
A portable Ethernet tester.
Fast. Simple. Battery-powered.
What it is
A handheld network tester to quickly check if an Ethernet port is live and has DHCP.
Designed for fast diagnostics in environments like hospitals, where unused ports are often left unpatched.
Powered by WIZnet’s W5500-EVB-Pico2 and a 1.3" OLED display, this tester fits in your pocket and costs under £20.
Lighter than a laptop. Always ready.
What it does
Connects via Ethernet
Checks for live link and DHCP lease
Displays result on OLED screen
Powered by rechargeable LiPo battery
Fully portable in 3D-printed case
Hardware
Main Board: WIZnet W5500-EVB-Pico2
Display: Waveshare 1.3" OLED HAT (64×128)
Battery: 3.7V 260mAh LiPo (601730)
Charging Module: TP4056 USB Type-C
Switch: Mini toggle for power
Case: Custom 3D-printed enclosure (STL files included)
Software
Language: MicroPython
Function:
Initializes Ethernet
Requests DHCP
Displays IP or failure message on OLED
Runtime: Fast boot, minimal power usage
Why W5500-EVB-Pico2?
Built-in WIZnet W5500 Ethernet chip:
Hardware TCP/IP offload for fast, reliable link detection
Raspberry Pi Pico-compatible design
Easy to code in MicroPython
Small enough to fit in any toolkit
Use Case
Perfect for:
✔ Field network technicians
✔ Hospital IT staff
✔ Makers and educators
✔ Anyone needing a fast way to check Ethernet availability
DIY-Friendly
Open-source. Affordable. Customizable.
All you need is a soldering iron, a 3D printer, and 20 minutes.
Resources
Full code in MicroPython
STL files for 3D case
GitHub: albank1/Network-tester---PICO-W5500