UCC

https://github.com/nandibrenna/Beremiz4uC

A wired Zephyr weather node on a board Zephyr has no definition for, and the four DHCP settings it took to survive a cable pull.

Zephyr's in-tree W5500 driver is MACRAW only. This repo adds an out-of-tree socket-offload driver on the chip's hardware TCP/IP.

Wired MQTT escape-room control on W5500-EVB-Pico2, using the WIZnet MicroPython build whose release ships both LWIP and TOE images.

https://github.com/mchristegh/sam-bridge

A rope encoder on a moving projection screen streams OSC at 201 Hz over W5500, after the CircuitPython driver proved call-bound.

Four UDP echo builds on one NUCLEO-H723ZG, measured for an hour each: W5500 hardware offload against MACRAW and the STM32's own MAC.

One industrial gateway written in C and again in Rust on the same STM32F407 and W5500, reconciled by the same 93-test e2e suite.

https://github.com/christophebelmont/Flow.io-Waveshare

An ESP32-S3 reads a LiFePO4 BMS over BLE and publishes it as MQTT over a W5500 PoE link, where Node-RED turns it into a Victron virtual battery.

An Industrial Motor Controller Built with STM32 and W5500 — RS-485 and Ethernet Behind One Register Map

ZigBee Coordinator

An open KiCad board merges four serial lines into one Ethernet feed on a W55RP20, driving ioLibrary hardware sockets directly with no lwIP in the build.

ESP32-based IMU sensor device for the natKit BCI toolkit. This device collects inertial measurement data and streams it to the natKit backend via MQTT.

Use esp32-s3-poe-eth to connect to Tesla Powerwall AP and proxy requests to ethernet

UC Berkeley's student rocket team, Space Enterprise at Berkeley (SEB), builds an Automatic Electronic Pressure Regulator (E-Reg)

Weidos doesn't use the W5500 as a plain Ethernet PHY/interface. Its official Ethernet.h-based library talks directly to the W5500's hardware TCP socket (TOE).

OpenAmber replaces the Itho Amber heat pump controller with an ESP32 running ESPHome; the ESP32-P4 build uses a WIZnet W5500 for wired Home Assistant control.

ESP32-S3 and W5500 controller that bridges FRC arena WebSocket PLC data to HUB counters, relays, and addressable LEDs.

A full-stack access control platform linking STM32 door hardware to MQTT, with optional W5500 Ethernet, Wi-Fi, RFID, fingerprint, and remote control.

ND-PicoDMX-System pairs a Raspberry Pi Pico with a WIZnet W5500 that receives Art-Net and sACN; dual-core firmware and PIO drive four DMX512 outputs at 40 Hz.

Ooznest board support in grblHAL/ESP32 routes Telnet, WebSocket, FTP and WebUI over a W5500 SPI Ethernet link on the ESP32-S3, with Wi-Fi compiled alongside.

Surat factory WiFi is unreliable, so the EaseEmbro MES gives its ESP32-S3 fingerprint terminal a W5500 wired Ethernet option. The platform runs 33 factories.

Native ethernet: config for WIZnet W6100 SPI and W6300 PIO QSPI on RP2040/RP2350, merged by Home Assistant developer bdraco and shipped in ESPHome 2026.4.0.