---
title: "Getting Started with the w5500 Rust Crate: Control WIZnet W5500 Ethernet Chip in Embedded Systems"
url: "https://maker.wiznet.io/scott/projects/getting-started-with-the-w5500-rust-crate-control-wiznet-w5500-ethernet-chip-in-embedded-systems/"
markdown_url: "https://maker.wiznet.io/scott/projects/getting-started-with-the-w5500-rust-crate-control-wiznet-w5500-ethernet-chip-in-embedded-systems/md"
type: "UCC: User Created Content"
author: "scott"
author_url: "https://maker.wiznet.io/scott/"
original_url: "https://crates.io/crates/w5500"
published: "2025-05-28"
language: "en"
likes: 0
views: 1641
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Getting Started with the w5500 Rust Crate: Control WIZnet W5500 Ethernet Chip in Embedded Systems

> Getting Started with the w5500 Rust Crate: Control WIZnet W5500 Ethernet Chip in Embedded Systems

Original source: https://crates.io/crates/w5500

## Article

## 🧠 Getting Started with the `w5500` Rust Crate: Control WIZnet W5500 Ethernet Chip in Embedded Systems

Are you building an embedded system that requires stable Ethernet connectivity? Do you want to write firmware in **Rust** and control the **WIZnet W5500 Ethernet chip** through **SPI**?
The [`w5500`](https://crates.io/crates/w5500) Rust crate is the perfect starting point.

In this article, you'll learn what this crate does, how it works, and how to integrate it into your embedded Rust project.

---

### 🔍 What is the `w5500` Crate?

The `w5500` crate provides a **low-level register interface** for the WIZnet W5500 Ethernet controller chip.
It allows developers to communicate with the W5500 over **SPI** from any MCU that supports Rust and the `embedded-hal` abstraction.

It’s designed for **no_std environments**, making it ideal for **bare-metal embedded applications**.

---

### ✨ Key Features

- ✅ **Full Register Access**: Configure IP, MAC, subnet, sockets, and control W5500 directly.

- ✅ `**embedded-hal**`** Compatible**: Works seamlessly with SPI and GPIO abstractions across many MCU platforms.

- ✅ **No-std Support**: Perfect for constrained environments with no operating system.

- ✅ **Flexible SPI Modes**: Supports both normal and burst SPI transfers.

- ✅ **Composable**: Easily used with high-level libraries like [`w5500-hl`](https://crates.io/crates/w5500-hl) or [`w5500-mqtt`](https://crates.io/crates/w5500-mqtt).

---

### 🛠 Example: Configure IP Address via SPI

Here’s a basic example of how to use the crate to configure the W5500’s gateway and subnet:

```plaintext
use w5500::W5500;
use embedded_hal::blocking::spi::Transfer;
use embedded_hal::digital::v2::OutputPin;

let mut w5500 = W5500::new(spi, chip_select);

w5500.set_gateway(&mut spi, &mut chip_select, &Ipv4Addr::new(192, 168, 0, 1))?;
w5500.set_subnet(&mut spi, &mut chip_select, &Ipv4Addr::new(255, 255, 255, 0))?;
```

This lets your Rust firmware talk to the outside world via Ethernet — no C code, no unsafe hacks.

---

### 🚀 Use Cases

The `w5500` crate is ideal for:

- 🌐 **IoT devices with Ethernet** (smart sensors, controllers)

- 🧰 **Industrial automation systems** needing reliable wired communication

- 📡 **MQTT-over-Ethernet endpoints** in low-power or real-time networks

- 🔒 **Security-focused edge devices** with Rust’s memory safety

---

### 📦 Why Use Rust for Embedded Networking?

Rust is becoming the go-to language for modern embedded development thanks to:

- 🛡️ **Memory safety without garbage collection**

- 🚀 **High performance on microcontrollers**

- 🧩 **Composable, reusable crates and HALs**

- 📚 **Growing ecosystem for **`**no_std**`** development**

Combining Rust with a hardware TCP/IP stack like W5500 allows you to build **secure and deterministic embedded network devices** with far fewer bugs and race conditions.

---

### 🔗 Learn More

- [Crate Page on crates.io →](https://crates.io/crates/w5500)

- [Documentation (docs.rs) →](https://docs.rs/w5500/latest/w5500/)

- [Higher-level abstraction → `w5500-hl`](https://crates.io/crates/w5500-hl)

---

### ✅ Conclusion

If you're developing a Rust-based embedded application and need Ethernet support via the WIZnet W5500, the `w5500` crate is a must-have.
It brings **hardware-level control** in a **safe and ergonomic Rust interface**, enabling high-performance networking on MCUs.

> Start your journey into embedded Ethernet with Rust today.
> Safe, fast, and future-proof.

---

Source: https://maker.wiznet.io/scott/projects/getting-started-with-the-w5500-rust-crate-control-wiznet-w5500-ethernet-chip-in-embedded-systems/