--- title: "🚀 Micropython with WIZnet W5500 EVB: Reliable Ethernet Communication for Raspberry Pi Pico" url: "https://maker.wiznet.io/matthew/projects/-micropython-with-wiznet-w5500-evb-reliable-ethernet-communication-for-raspberry-pi-pico/" markdown_url: "https://maker.wiznet.io/matthew/projects/-micropython-with-wiznet-w5500-evb-reliable-ethernet-communication-for-raspberry-pi-pico/md" type: "UCC: User Created Content" author: "Stephanj Hennion" author_url: "https://sjhennion.github.io/jekyll/update/2023/09/22/w5500-intro.html#:~:text=Enter%20the%20Wiznet%20series%20of,with%20the%20Wiznet%20W5500%20EVB" editor: "WIZnet" editor_url: "https://maker.wiznet.io/" original_author: "Stephanj Hennion" original_url: "https://sjhennion.github.io/jekyll/update/2023/09/22/w5500-intro.html#:~:text=Enter%20the%20Wiznet%20series%20of,with%20the%20Wiznet%20W5500%20EVB" published: "2025-04-17" language: "en" tags: ["MicroPython", "W5500"] hardware: ["WIZnet W5500-EVB-Pico"] likes: 0 views: 12479 comments: 0 source: "WIZnet Makers (https://maker.wiznet.io/)" --- # 🚀 Micropython with WIZnet W5500 EVB: Reliable Ethernet Communication for Raspberry Pi Pico > Using MicroPython and WIZnet W5500 EVB-Pico, this project enables stable Ethernet communication for Raspberry Pi Pico, including DHCP, ping, and TCP socket test Original author: Stephanj Hennion (source: https://sjhennion.github.io/jekyll/update/2023/09/22/w5500-intro.html#:~:text=Enter%20the%20Wiznet%20series%20of,with%20the%20Wiznet%20W5500%20EVB) ## Components - **WIZnet W5500-EVB-Pico** x 2 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/w5500-evb-pico)) - Software: **MicroPython** ([docs](http://micropython.org/)) ## Article Looking to connect your Raspberry Pi Pico projects over Ethernet? This tutorial dives into using **Micropython** with the **WIZnet W5500 EVB-Pico**, a microcontroller board featuring **WIZnet’s W5500 Ethernet TOE chip (TCP/IP Offload Engine)**. From **DHCP-based IP acquisition** to **bidirectional data transfer** between multiple units, this step-by-step guide equips you to build robust wired communication for your IoT projects. --- ## 🛠 Hardware Overview | Component | Description | | --- | --- | | **MCU** | Raspberry Pi Pico | | **Ethernet Module** | WIZnet W5500 EVB-Pico | | **Communication Interface** | SPI (MOSI=19, MISO=16, SCK=18, CS=17, RESET=20) | | **Power Supply** | USB from host PC or charger | | **Status Indicator** | Onboard LED (Pin 25) | **W5500 TOE Ethernet Chip Advantage**: WIZnet’s W5500 integrates a hardware TCP/IP stack (TOE), enabling stable and offloaded Ethernet communication—ideal for low-power and embedded systems where reliability is a must. --- ## 💻 Software Stack | Stack Layer | Details | | --- | --- | | **Firmware** | Micropython v1.20.0 (official build recommended) | | **Development Tool** | `rshell` (for file upload, REPL access) | | **Programming Language** | Python (Micropython dialect) | | **Network Interface** | WIZNET5K driver | | **Transport Protocol** | TCP/IP over Ethernet, DHCP or Static IP | --- ## 🔁 Project Workflow ### 1. Flash Micropython & Set Up rshell Install official `v1.20.0 .uf2` Micropython firmware onto your Pico board. Use `rshell` to upload scripts and access the REPL console. ### 2. Acquire IP via DHCP and Ping Test Run `dhcp_ping.py` script using `rshell repl`. Verify IP assignment and LED blinking pattern. Ping the W5500 EVB from your PC to confirm connection. ### 3. W5500-to-W5500 Bidirectional Communication Configure one board as a server (`is_server=True`) and the other as a client. Use `bidirectional.py` to initiate continuous data transfer with LED-based visual feedback. ### 4. W5500 ↔ PC Socket Communication Launch a TCP server on your PC using `Python3`. Modify W5500 client code to connect to the PC’s IP. Exchange integer data and monitor real-time activity. --- ## 🌟 Why W5500 Matters for Ethernet Projects **Built-in Hardware TCP/IP Stack (TOE)**: Less processing load on MCU. **Stable Ethernet over SPI**: Ideal for industrial or IoT-grade reliability. **Micropython Friendly**: Easy integration with MicroPython firmware and dev tools. **Minimal Latency**: ~0.4ms ping response in test environments. **Supports DHCP and Static IP**: Flexible in dynamic or controlled networks. --- ## 🔎 Key Code Snippets python 복사편집 `# Initialize W5500 Ethernet Chip with SPI spi = SPI(0, 2_000_000, mosi=Pin(19), miso=Pin(16), sck=Pin(18)) nic = network.WIZNET5K(spi, Pin(17), Pin(20)) nic.active(True) nic.ifconfig('dhcp') # Or assign static IP manually ` python 복사편집 `# TCP Server (either on W5500 or PC) s = socket() s.bind(('192.168.1.20', 5000)) s.listen(5) conn, addr = s.accept() data = conn.recv(2048) conn.send(data)` --- ## 🧪 Testing Results **Ping latency**: ~0.443 ms **Ethernet IP**: Assigned dynamically via DHCP (`192.168.1.95`) **Bidirectional communication**: Integer values passed back and forth successfully **LED patterns**: Fast/slow blink logic to visually confirm communication status --- ## 🧰 Troubleshooting Tips Use the **official Micropython build** to avoid socket errors. Confirm both boards are powered and on the **same network**. Use static IPs carefully; avoid IP conflicts on your router. Monitor for `OSError: 4` or `EACCES`—these often relate to improper startup sequence between server and client. --- ## 🔗 Resources & References 📄 [Full Project Blog](https://sjhennion.github.io/jekyll/update/2023/09/22/w5500-intro.html) 📥 Micropython v1.20.0 .uf2 Download 🛠️ [rshell GitHub Repo](https://github.com/dhylands/rshell) --- ## 💡 Future Applications Build a **reliable wired IoT sensor node** using W5500 EVB Develop a **MicroPython-based gateway** that bridges Ethernet and serial protocols Extend the bidirectional logic for **real-time device monitoring** --- ## ✅ Ready to Share? Let us know if you'd like to: **Highlight specific WIZnet features** more prominently? **Include MQTT or cloud connectivity** examples as follow-up? Or shall we move on to the **next stage: auto-generating the presentation slides (PPT)?** --- ## 📌 Suggested Follow-Up Questions **Can this project integrate with cloud platforms via MQTT over Ethernet?What makes the W5500 TOE chip more reliable than software TCP/IP?Can I run a web server directly on W5500-based Pico?How do I extend this to support multiple clients per server?What are the real-world use cases for this architecture in industry or education?** --- Source: https://maker.wiznet.io/matthew/projects/-micropython-with-wiznet-w5500-evb-reliable-ethernet-communication-for-raspberry-pi-pico/