---
title: "ESP32-S3 Dual Interface Network Example"
url: "https://maker.wiznet.io/jakelee/projects/esp32-s3-dual-interface-network-example/"
markdown_url: "https://maker.wiznet.io/jakelee/projects/esp32-s3-dual-interface-network-example/md"
type: "UCC: User Created Content"
author: "Ahmed Al-Alousi"
author_url: "https://github.com/ahmedalalousi/esp32-community-projects?tab=readme-ov-file#esp32-s3-dual-interface-network-example"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "Ahmed Al-Alousi"
original_url: "https://github.com/ahmedalalousi/esp32-community-projects?tab=readme-ov-file#esp32-s3-dual-interface-network-example"
published: "2025-12-31"
language: "en"
hardware: ["Espressif ESP32-S3", "WIZnet W5500"]
likes: 0
views: 522
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# ESP32-S3 Dual Interface Network Example

> The project focuses on dual-interface coexistence, showing how the ESP32-S3 can initialize and manage both interfaces at the same time.

Original author: Ahmed Al-Alousi (source: https://github.com/ahmedalalousi/esp32-community-projects?tab=readme-ov-file#esp32-s3-dual-interface-network-example)

## Components

- **Espressif ESP32-S3** x 1
- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Article

## ✨ Project Description

This project demonstrates how an **ESP32-S3** can be configured to operate with **both Wi-Fi and Ethernet network interfaces enabled simultaneously**.

The example focuses on **network interface coexistence**, showing that an ESP32-S3 device does not need to choose between wired and wireless connectivity. Instead, both interfaces can be initialized and managed within the same firmware.

This project is presented as a **reference example**, not a complete application.

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## 🧠 Motivation

In many embedded designs, Ethernet and Wi-Fi are treated as mutually exclusive options. This example challenges that assumption by showing a **multi-interface networking model**, where:

- Wi-Fi and Ethernet can coexist

- Network flexibility is increased

- Application logic is decoupled from transport choice

This approach is useful for modern embedded and edge devices that require **resilience, flexibility, or multiple access paths**.

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## 🧩 Hardware Environment

> ![](https://maker.wiznet.io/upload/ckeditor5/438137930%5F1767153836%2Epng)

---

## 💻 Software Environment

**ESP-IDF framework**

- ESP32-S3 networking stack

- Multiple network interfaces enabled in the same application

The example focuses on:

- Network interface initialization

- Interface coexistence

- Runtime network configuration

It **does not** include application-layer protocols such as HTTP, MQTT, or cloud services.

---

## ⚙️ Key Features

✅ **Dual Interface Support:** WiFi and Ethernet work simultaneously
✅ **Automatic Failover:** Prefers Ethernet when available, falls back to WiFi
✅ **Non-blocking Connection:** Both interfaces connect asynchronously
✅ **Clean API:** Simple functions to check status and get IP addresses
✅ **Production Ready:** Proper error handling and logging
✅ **Fully Documented:** Every configuration option explained

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## 🛠️ What This Project Demonstrates

- How ESP32-S3 handles **multiple active network interfaces**

- **How W5500 can be introduced without removing Wi-Fi support**

- A reusable architectural pattern for **dual-interface embedded systems**

- How ESP-IDF abstracts network interfaces at a system level

For WIZnet users, this example helps clarify **where SPI-based Ethernet devices fit** within ESP32 designs that already include Wi-Fi.

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## 🎯 Use Cases

- **Hybrid Ethernet + Wi-Fi embedded devices**

- **Ethernet-first edge devices with wireless configuration**

- Prototyping dual-network designs on ESP32-S3

- Reference for ESP32-S3 + W5500 integration projects

---

## 📌 Summary

This project provides a clear example of **dual-interface networking on ESP32-S3 and W5500**, showing how Wi-Fi and Ethernet can coexist within a single embedded system. Its value lies in demonstrating a **flexible network architecture** rather than a specific hardware or protocol implementation.

---

Source: https://maker.wiznet.io/jakelee/projects/esp32-s3-dual-interface-network-example/