---
title: "WIZnet W5100S"
url: "https://maker.wiznet.io/products/w5100s/"
markdown_url: "https://maker.wiznet.io/products/w5100s/md"
type: "WIZnet product hub"
product_page: "https://docs.wiznet.io/Product/Chip/Ethernet/W5100S"
projects: 78
language: "en"
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# WIZnet W5100S

> Hardwired TCP/IP Ethernet controller chip.

## Documents

- [Product page](https://docs.wiznet.io/Product/Chip/Ethernet/W5100S)

## Projects and products using W5100S

- [How Does Appletini ONE Serve a Real Apple //e as MCP Tools with a W5100S on the Bus?](https://maker.wiznet.io/Benjamin/projects/how-does-appletini-one-serve-a-real-apple-e-as-mcp-tools-with-a-w5100s-on-the-bus/) (UCC, 2026-08-21): Appletini ONE is a Zynq-7020 Apple //e card. Its MCP server reads the live screen over UART, and a WIZnet W5100S carries the virtual Uthernet II.
- [MESHCN Firmware: Extending an Off-Grid LoRa Mesh Network with W5100S Ethernet](https://maker.wiznet.io/sophia/projects/meshcn-firmware-extending-an-off-grid-lora-mesh-network-with-w5100s-ethernet/) (UCC, 2026-07-16): LoRa mesh networking platform designed to exchange text messages, location data, and telemetry without relying on Internet or cellular infrastructure
- [repeat](https://maker.wiznet.io/Grace_Koo/projects/repeat/) (UCC, 2026-07-03): An nRF5340 IoT gateway funneling BLE data over W5100S wired Ethernet, with PoE for data and power on one cable.
- [GatePi-Ethernet-Software](https://maker.wiznet.io/Grace_Koo/resellers/gatepi-ethernet-software/) (VAR, 2026-06-16): A 6-channel relay board by SB Components combining RP2040, WIZnet W5100S Ethernet, and RS485 for wired remote IO control in industrial environments.
- [meshcore](https://maker.wiznet.io/Aimee0/projects/meshcore/) (UCC, 2026-05-15): MeshCore is an open-source LoRa mesh project for encrypted off-grid messaging without internet or cellular networks.
- [Meshtastic Firmware](https://maker.wiznet.io/matthew/projects/meshtastic/) (UCC, 2026-03-11): Meshtastic firmware powers off-grid LoRa mesh devices, while selected WIZnet-enabled boards add Ethernet services for API, time sync, and gateway-style roles.
- [Pico/Pico2 Wired Ethernet on FreeRTOS: W5500/W5100S with LwIP SYS Mode (NO_SYS=0) and Test Examples](https://maker.wiznet.io/sophia/projects/pico-pico2-wired-ethernet-on-freertos-w5500-w5100s-with-lwip-sys-mode-no-sys-0-and-test-examples/) (UCC, 2025-12-30): Learn a practical open-source pattern for running WIZnet W5500 or W5100S on Raspberry Pi Pico/Pico2 via SPI using FreeRTOS and LwIP in SYS mode (NO_SYS=0)
- [TMS320F28379D: Unable to interface Wiznet's W5100s SPI to ethernet module with F28379D](https://maker.wiznet.io/andrew/projects/tms320f28379d-unable-to-interface-wiznets-w5100s-spi-to-ethernet-module-with-f28379d/) (UCC, 2025-12-16): TMS320F28379D: Unable to interface Wiznet's W5100s SPI to ethernet module (wiz810sio specifically) with F28379D Launchpad/Daughter Card
- [보안/출입통제 시스템에 WIZnet W5100S 활용: UBSmart 사례](https://maker.wiznet.io/sophia/resellers/---wiznet-w5100s--ubsmart-/) (VAR, 2025-11-26): 유비스마트는 TCP/IP 유선/인터넷 통신을 지원하는 보안/출입통제 시스템을 제조하며, WIZnet W5100S와 같은 임베디드 이더넷 칩 활용 가능성이 있는 실제 상용 제품 사례입니다.
- [Installing Firmware on SP2301 Linux EVB — Enabling Dual-Port Ethernet for Industrial IoT](https://maker.wiznet.io/sophia/projects/installing-firmware-on-sp2301-linux-evb--enabling-dual-port-ethernet-for-industrial-iot/) (UCC, 2025-10-24): Empowering Industrial Networks with Dual Ethernet
- [WisMesh Ethernet MQTT Gateway](https://maker.wiznet.io/viktor/resellers/wismesh-ethernet-mqtt-gateway/) (VAR, 2025-10-22): The MQTT Gateway for Meshtastic
- [RP2040-W5100S-MM5D91](https://maker.wiznet.io/viktor/projects/rp2040-w5100s-mm5d91/) (UCC, 2024-08-19): RP2040-W5100S-MM5D91
- [Detection and bugfix procedures for S2E modules](https://maker.wiznet.io/mark/projects/detection-and-bugfix-procedures-for-s2e-modules/) (WCC, 2024-05-27): An automated program for detection and error correction of an S2E module based on W5100S-EVB-PICO.
- [RP2040-ETH-DVI-ZERO: AnyView ( HDMI Mode )](https://maker.wiznet.io/gavinchang/projects/rp2040-eth-dvi-zero-anyview-hdmi-mode/) (WCC, 2024-05-24): Continuously screenshot the image of a specific window on the PC and send it to another monitor by network, this monitor receive and display them.
- [W5100S-PORT](https://maker.wiznet.io/gavinchang/projects/w5100s-port/) (WCC, 2024-05-03): W5100S-PORT is to put W5100S inside the RJ45 shell.
- [RP2040-ETH-DVI-ZERO: Adafruit IO Dashboard Monitor ( HDMI / DVI Mode )](https://maker.wiznet.io/gavinchang/projects/rp2040-eth-dvi-zero-adafruit-io-dashboard-monitor-hdmi-dvi-mode/) (WCC, 2024-04-22): A newly developed Raspberry Pi RP2040 development board with DVI interface and Ethernet. This project can display adafruit IO dashboard and followup any change.
- [Load image into Gallery viewer, CoCoIOr - bootable ethernet card Load image into Gallery viewer, Co](https://maker.wiznet.io/simons/projects/load-image-into-gallery-viewer-cocoior-bootable-ethernet-card-load-image-into-gallery-viewer-co/) (UCC, 2024-03-04): CoCoIOr features the WizNet 5100s ethernet chip. This amazing device manages 4 separate TCP or UDP network stacks all by itself, the host computer's job is to f
- [tv-coco-wiznet](https://maker.wiznet.io/simons/projects/tv-coco-wiznet/) (UCC, 2024-03-04): Audio/Video player for Coco3 Currently works on coco3 with CocoIO. This is all a work-on-progress.
- [W5100S-POE-EVB-PICO With SSL/TLS ( New ChatGPT API )](https://maker.wiznet.io/gavinchang/projects/w5100s-poe-evb-pico-with-ssl-chatgpt-api/) (WCC, 2024-02-23): SSL communication encryption is achieved on W5100S-POE-EVB-PICO.I will introduce how to use W5100S access ChatGPT directly as an example.
- [NetPi](https://maker.wiznet.io/austin/resellers/netpi-pico-ethernet-1/) (VAR, 2023-12-04): NetPi is the perfect solution for your Raspberry Pi Pico's connectivity needs.
- [Micropython FW Custom: for WIZNET5K on Your Hardware](https://maker.wiznet.io/scarlet/projects/micropython-fw-custom-for-wiznet5k-on-your-hardware/) (WCC, 2023-11-20): Create custom Micropython firmware for WIZNET5K tailored to your hardware needs.
- [Network Ambilight Background Light (POE+PICO)](https://maker.wiznet.io/gavinchang/projects/network-ambilight-background-light-poe-pico/) (WCC, 2023-11-01): The color of the light follows the screen display, synchronizes the color of screen edge by network, and PICO show the color in real time.
- [3D Laser Radar: "Cloud Motion" work with "Cloud Pixel"](https://maker.wiznet.io/gavinchang/projects/3d-laser-radar%3A-cloud-motion-work-with-cloud-pixel/) (WCC, 2023-10-19): Cloud Motion is a 2-degree-of-freedom network gimbal.3D Laser Radar is the first application on Cloud Movtion, which work with Cloud Pixel.
- [NetPi](https://maker.wiznet.io/austin/projects/netpi-pico-ethernet/) (UCC, 2023-10-05): NetPi is the perfect solution for your Raspberry Pi Pico's connectivity needs.
- [3D Laser Radar Tower based on 2-degree-of-freedom network gimbal (POE+PICO)](https://maker.wiznet.io/gavinchang/projects/3d-laser-radar-tower-based-on-2-degree-of-freedom-network-gimbal-poe-pico/) (WCC, 2023-09-22): Dynamic scanning of lidar is performed through 2-degree-of-freedom network gimbal to form a 3D photo containing distance information.
- [Recommended Weather-Appropriate Song Playlists by using W5x00-EVB-Pico with DHT11 & MQTT protocol](https://maker.wiznet.io/TheoIm/projects/recommended-weather-appropriate-song-playlists-by-using-w5x00-evb-pico-with-dht22-mqtt-protocol/) (WCC, 2023-09-20): Created a project using a W5100S-EVB-PICO board with a DHT11 sensor to collect weather data. Utilized MQTT communication to recommend playlists based on weather
- [Async ESP8266_W5100s_Manager](https://maker.wiznet.io/gavinchang/projects/async-esp8266-w5100-manager/) (UCC, 2023-09-20): (ESP8266 + LwIP W5100 / W5100S) Connection and Credentials Manager using AsyncWebServer, with enhanced GUI and fallback Web ConfigPortal.
- [Remote Control Tower: Control infrared devices by "Hey Siri" (POE+PICO）](https://maker.wiznet.io/gavinchang/projects/remote-control-tower%3A-control-infrared-devices-by-hey-siri-poe-pico%EF%BC%89/) (WCC, 2023-09-18): How to use Remote Control Tower: "Hey siri, Please open dyson fan"，"Hey siri, Increase the air volume of Dyson fan","Hey siri, please open the TV".
- [My own analog web favorites](https://maker.wiznet.io/Alan/projects/my-own-analog-web-favorites/) (WCC, 2023-09-14): W5100S + PoE
- [AnyPrint：Print any Text by Cloud Printer](https://maker.wiznet.io/gavinchang/projects/anyprint%EF%BC%9Aprint-any-word-by-cloud-printer/) (WCC, 2023-08-30): In order to use Cloud Printer with PC, I use Chatgpt to help develop a Python program, which can use Cloud Printer to print any text
- [Light Tower Powered by W5100S_POE_EVB_PICO(POE+PICO)](https://maker.wiznet.io/gavinchang/projects/light-tower-powered-by-poe-pico-w5100s-poe-evb-pico/) (WCC, 2023-08-24): Light Tower powered by POE PICO(W5100S_POE_EVB_PICO)
- [Digital Safe Box (RP2040+W5100S+FingerPrint) Part 2 (Finished)](https://maker.wiznet.io/gavinchang/projects/digital-safe-box-rp2040-w5100s-fingerprint-part-2-finished/) (WCC, 2023-08-21): Make a Digital Safe Box using Raspberry Pi RP2040 ,Fingerprint, Servo, OLED, Buzzer and W5100S Wizfi360 .
- [Ethernet Surge Test - W5100S + Pico](https://maker.wiznet.io/Alan/projects/ethernet-surge-test-w5100s-pico/) (WCC, 2023-08-15): Ethernet Surge Test - W5100S + Pico
- [Digital Safe Box (RP2040+W5100S+FingerPrint) Part 1](https://maker.wiznet.io/gavinchang/projects/digital-safe-box-rp2040-w5100s-fingerprint-part1%3A-software/) (WCC, 2023-08-11): Digital Safe Box (RP2040+W5100S+FingerPrint) Part1: Software
- [Pico Remote control Lamp (coded with chatGPT prompt)](https://maker.wiznet.io/scarlet/projects/pico-remote-control-lamp/) (WCC, 2023-08-11): This project showcases control and lamp devices for adjusting lamp color and brightness via MQTT, with info display on OLED.
- [Writing discord messages / W5100S + Pico](https://maker.wiznet.io/Alan/projects/writing-discord-messages-w5100s-pico/) (WCC, 2023-08-07): Use the W5100S and the Pico board to write messages to Discord.
- [W5100S-POE-EVB-PICO(POE development board for RP2040)](https://maker.wiznet.io/gavinchang/projects/w5100s-poe-evb-pico-poe-development-board-for-rp2040/) (WCC, 2023-07-19): Ethernet Development Board for Raspberry Pi RP2040 with POE Capability,
- [BLE to Ethernet ! Pico W + W5100S + PoE](https://maker.wiznet.io/Alan/projects/ble-to-ethernet-%21-pico-w-w5100s-poe/) (WCC, 2023-07-17): .
- [PoE Test board production record - Let's test various modules](https://maker.wiznet.io/Alan/projects/poe-test-board-production-record-lets-test-various-modules/) (WCC, 2023-07-07): I made a board to test PoE with W5100S + Pico board.
- [Choice! Check your fortune with tarot cards !](https://maker.wiznet.io/Alan/projects/choice%21-check-your-fortune-with-tarot-cards-%21/) (WCC, 2023-07-07): Choice! Check your fortune with tarot cards !
- [Weather Prediction Electric Cushion](https://maker.wiznet.io/Alan/projects/weather-prediction-electric-cushion/) (WCC, 2023-07-07): Raspberry pi Pico + W5100S / Chat GPT + Web Crawling
- [BLE to Ethernet PoE Gateway](https://maker.wiznet.io/Alan/projects/ble-to-ethernet-poe-gateway/) (WCC, 2023-06-30): The project aims to use PicoW as a BLE-to-Ethernet PoE Gateway using WIZnet products.
- [How to start with W5100S XIAO-RP2040](https://maker.wiznet.io/louis_m/projects/how-to-start-with-w5100s-xiao-rp2040/) (WCC, 2023-06-23): How to start with W5100S XIAO-RP2040
- [The world's smallest oscilloscope & Pico PoE upgrade](https://maker.wiznet.io/Alan/projects/the-worlds-smallest-oscilloscope/) (WCC, 2023-06-23): I don't have an oscilloscope at home. I wanted to have the smallest oscilloscope that I can use on a web page!
- [Cloud Camera(Raspberry Pi RP2040 + w5100s + POE) Part 1：Hardware](https://maker.wiznet.io/gavinchang/projects/cloud-camera-raspberry-pi-rp2040-w5100s-poe-part-1%EF%BC%9Ahardware/) (WCC, 2023-06-19): I want to develop a RP2040-based IP camera, and do application development based on the cloud platform.
- [\[RE\] CoCoIO network only](https://maker.wiznet.io/taylor/resellers/cocoio-network-only/) (VAR, 2023-06-02): CoCoIO is based on the WizNet 5100s ethernet chip. This amazing device can manage 4 separate TCP or UDP network stacks all by itself.
- [DFRduino Ethernet Shield V3.0](https://maker.wiznet.io/scott/resellers/dfrduino-ethernet-shield-v3-0/) (VAR, 2023-06-01): Use this DFRduino Ethernet W5100S Shield to connect your Arduino to the Internet with a RJ45 cable.
- [W5100Sio-M](https://maker.wiznet.io/gavinchang/resellers/w5100sio-m/) (VAR, 2023-04-25): W5100Sio-M
- [HS-NM5100SA](https://maker.wiznet.io/WIZnet/resellers/hs-nm5100sa/) (VAR, 2023-04-04): Hs-NM5100SA is a product that integrates W5100S with necessary peripheral components on a circuit board to provide customers with convenient
- [HS-EVBW5100S/STM32Z](https://maker.wiznet.io/WIZnet/resellers/hs-evbw5100s-stm32z-1/) (VAR, 2023-04-04): Hs-EVBW5100S /STM32Z is an evaluation board specially launched for the W5100S.
- [AutomaticGreenhouse](https://maker.wiznet.io/louis_m/projects/automaticgreenhouse/) (UCC, 2023-04-03): This project is to design and build a solar powered outdoor greenhouse that can monitor and control the temperature & humidity of the air as
- [W5100SIO](https://maker.wiznet.io/WIZnet/resellers/w5100sio/) (VAR, 2023-03-24): W5100SIO module is the smallest functional module of Ethernet with the core of W5100S chip.
- [W5100S + STM32F103 EVB](https://maker.wiznet.io/WIZnet/resellers/w5100s-stm32f103-evb/) (VAR, 2023-03-24): W5100S + STM32F103 EVB
- [W5100S network module SPI/ parallel port](https://maker.wiznet.io/WIZnet/resellers/w5100s-network-module-spi-parallel-port/) (VAR, 2023-03-24): Place the SMT components on one side, small size PCB: 45mm 30mm;Careful wiring, optimize component layout and signal routing;The cooling hol
- [RP2040 Ethernet HAT Adafruit IO connect](https://maker.wiznet.io/WIZnet/projects/rp2040-ethernet-hat-adafruit-io-connect/) (UCC, 2023-02-20): RP2040 Ethernet HAT Adafruit IO connect
- [Netpi - Ethernet HAT for Rpi Pico](https://maker.wiznet.io/viktor/resellers/netpi-ethernet-hat-for-rpi-pico/) (VAR, 2023-02-10): Ethernet HAT that enables your Pico to connect to internet easily
- [CircuitPython with WIZnet Ethernet HAT for RPi Pico](https://maker.wiznet.io/WIZnet/projects/circuitpython-with-wiznet-ethernet-hat-for-rpi-pico/) (UCC, 2023-02-09): A little project with 4 networks, 2 Ethernet and 2 Wi-Fi based on CircuitPython
- [W5100S module development board W5500 Ethernet network module SPI/8-bit data bus STM32 routine](https://maker.wiznet.io/matthew/resellers/w5100s-module-development-board-w5500-ethernet-network-module-spi-8-bit-data-bus-stm32-routine/) (VAR, 2023-02-02): W5100S module development board W5500 Ethernet network module SPI/8-bit data bus STM32 routine Rev2.0 [WisioE]
- [W5100s Pet and medicine dispenser](https://maker.wiznet.io/nagamma06/projects/w5100s-pet-and-medicine-dispenser/) (UCC, 2023-02-02): W5100s Pet and medicine dispenser
- [HS-EVBW5100S/STM32Z](https://maker.wiznet.io/austin/resellers/hs-evbw5100s-stm32z/) (VAR, 2023-01-17): Product using W5100S
- [MV4th16 WIZnet W5100](https://maker.wiznet.io/louis_m/resellers/mv4th16-wiznet-w5100/) (VAR, 2023-01-02): WIZnet W5100 Ethernet controller to provide TCP communications for MV4th16.
- [Web Relay Con V2.0 HW-584 Network Module 8/16 Channel Relay Controller ENC28J60 – Reprogramming Demo](https://maker.wiznet.io/scarlet/projects/web-relay-con-v2-0-hw-584-network-module-8-16-channel-relay-controller-enc28j60-%E2%80%93-reprogramming-demo/) (UCC, 2023-01-02): Web Relay Con V2.0 HW-584 Network Module 8/16 Channel Relay Controller ENC28J60 – Reprogramming Demo
- [embedded-wireless-framework](https://maker.wiznet.io/mason/projects/embedded-wireless-framework/) (UCC, 2022-12-29): embedded-wireless-framework
- [Let's use Google Speech to control the device](https://maker.wiznet.io/louis_m/projects/lets-use-google-speech-to-control-the-device/) (WCC, 2022-12-15): Use Google Speech-to-Text API to convert voice to text and then control the device.
- [make loopback server with STM32f103vc and w5100s](https://maker.wiznet.io/scarlet/projects/make-loopback-server-with-stm32f103vc-and-w5100s/) (UCC, 2022-12-14): make loopback server using STM32CubeMX with W5100S-EVB,
- [DIY Ethernet shield (W5100)](https://maker.wiznet.io/eric_g/projects/diy-ethernet-shield-w5100/) (UCC, 2022-12-02): I've made an Ethernet shield compatible with the official one on through-hole components.
- [CycloneTCP_SSL_SSH_CRYPTO](https://maker.wiznet.io/taylor/projects/cyclonetcp-ssl-ssh-crypto/) (UCC, 2022-11-16): CycloneTCP is a dual IPv4/IPv6 stack dedicated to embedded applications.
- [W5100S STM32 Development Board Hardware TCP/IP Protocol Stack Ultra W5500, W5100 Compatible](https://maker.wiznet.io/nagamma06/resellers/w5100s-stm32-development-board-hardware-tcp-ip-protocol-stack-ultra-w5500%2C-w5100-compatible/) (VAR, 2022-11-02): W5100S STM32 Development Board Hardware TCP/IP Protocol Stack Ultra W5500, W5100 Compatible
- [Sound Gateway](https://maker.wiznet.io/viktor/resellers/sound-gateway/) (VAR, 2022-10-05): Sound gateway based on RP2040
- [Loopback server and Scroll up LCD for W5100-EVB-Pico](https://maker.wiznet.io/scarlet/projects/loopback-server-and-scroll-up-lcd-for-w5100-evb-pico/) (UCC, 2022-09-23): Loopback server and Scroll up LCD for W5100-EVB-Pico
- [Duino Coin Mining with WIZnet W5100S-PICO-Mining Rig](https://maker.wiznet.io/mason/projects/duino-coin-mining-with-wiznet-w5100s-pico-mining-rig/) (WCC, 2022-09-19): Let's see how to mine the Duino coin using WIZnet W5100S-PICO-Mining Rig. Who knows! Maybe this could make us rich!!!??
- [ARDUINO NETWORK MODULE COMPATIBLE UNO MINI W5100 ETHERNET](https://maker.wiznet.io/wiz_chandana/resellers/arduino-network-module-compatible-uno-mini-w5100-ethernet/) (VAR, 2022-09-06): ARDUINO NETWORK MODULE COMPATIBLE UNO MINI W5100 ETHERNET. The W5100 MINI module is a single chip ethernet interface, with built-in 10/100 M
- [yss_example_project \[STM32F103VC\]bootloader_using_W5100S](https://maker.wiznet.io/mason/projects/yss-example-project-%5Bstm32f103vc%5Dbootloader-using-w5100s/) (UCC, 2022-08-31): yss_example_project [STM32F103VC]bootloader_using_W5100S
- [Ethernent Webserver SSL](https://maker.wiznet.io/eric_g/projects/ethernent-webserver-ssl/) (UCC, 2022-08-31): TLS/SSL Ethernet WebServer, HTTP Client and WebSocket Client library
- [ESP32-W5100](https://maker.wiznet.io/eric_g/projects/esp32-w5100/) (UCC, 2022-08-31): Port of the WIZnet W5100 to the ESP-IDF. This is a test app that runs the basic esp-idf mqtt/ssl and esp_http_client examples over the W5100
- [Smart Door Using RFID Technology with Internet of things](https://maker.wiznet.io/dheeraj/projects/smart-door-using-rfid-technology-with-internet-of-things/) (UCC, 2022-08-29): A smart home that helps the users to find who is knocking on the gate using wiznet's w5100
- [WeChat client + WeChat public platform + Sina cloud SAE + Arduino + W5100S (control LED)](https://maker.wiznet.io/gemma/projects/WeChat-client-WeChat-public-platform-Sina-cloud-SAE-Arduino-W5100S-control-LED/) (UCC, 2022-08-29): WeChat client + WeChat public platform + Sina cloud SAE + Arduino + W5100S (control LED)
- [W5100S??MQTT connects to Baidu Tiangong cloud platform](https://maker.wiznet.io/teju/projects/W5100SMQTT-connects-to-Baidu-Tiangong-cloud-platform/) (UCC, 2022-03-02): W5100S??MQTT connects to Baidu Tiangong cloud platform

## Related forum questions

- [W5100S EVB Pico ADC floating values when input sensor is disconnected](https://maker.wiznet.io/forum/15956) (2025-12-18, 3 replies)
- [(W5100S) Is there a software way to disable the LED on the RJ45 connector?](https://maker.wiznet.io/forum/15881) (2025-09-18, 1 replies)
- [W5100S-EVB-Pico - ethernet shield not found](https://maker.wiznet.io/forum/15785) (2025-07-03, 2 replies)
- [Raspberry Pi + Wiznet Ethernet (W5100S/W5500/W6100) – Hardware + Firmware Notes](https://maker.wiznet.io/forum/15732) (2025-05-19, 2 replies)
- [\[W5100S\] 핑 응답 관련 문의](https://maker.wiznet.io/forum/15644) (2025-03-17, 1 replies)
- [RP2350 (W5100S-EVB-Pico2 ....) Arduino pico fork](https://maker.wiznet.io/forum/15635) (2025-03-11, 2 replies)
- [W5100s Sn_RX_WR wrap issue](https://maker.wiznet.io/forum/15618) (2025-03-01, 2 replies)
- [Wiznet w5100s evb arduino skeych](https://maker.wiznet.io/forum/15617) (2025-03-01, 3 replies)
- [LwIP and W5100s](https://maker.wiznet.io/forum/15550) (2025-01-30, 2 replies)
- [NetX and W5100S](https://maker.wiznet.io/forum/15544) (2025-01-27, 1 replies)

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Source: https://maker.wiznet.io/products/w5100s/