The ESP32 microcontroller is widely known for its versatile applications, especially in IoT (Internet of Things) projects. While the ESP32 is equipped with built-in Wi-Fi and Bluetooth capabilities, sometimes using a wired Ethernet connection is preferred for stable, high-speed data transmission in industrial environments. The W5500 Ethernet module is a perfect fit for such cases, allowing the ESP32 to connect to wired networks.
In this blog, we will guide you through the process of interfacing the ESP32 with the W5500 Ethernet module, and provide you with sample code to get your setup running quickly. Whether you're working on a personal IoT project or designing a robust industrial solution, this tutorial will help you add Ethernet functionality to your ESP32.
Why Use the W5500 Ethernet Module with ESP32?
The W5500 Ethernet module is a hardwired TCP/IP Ethernet controller that supports full-duplex and high-speed SPI communication with microcontrollers like the ESP32. It provides:
- Stable wired connections that are immune to interference.
- Higher speed and bandwidth compared to wireless communication.
- Reliability in industrial settings or environments with heavy radio frequency interference.
- Low power consumption, making it ideal for low-energy IoT applications.
Components Needed for ESP32 and W5500 Interface
Before we begin, you’ll need the following components:
- ESP32 development board
- W5500 Ethernet module
- Ethernet cable
- Jumper wires
- Breadboard (optional)
Wiring the ESP32 and W5500 Ethernet Module
The ESP32 communicates with the W5500 Ethernet module via SPI (Serial Peripheral Interface). Follow the wiring diagram below:
Writing the Code: ESP32 MQTT Client with W5500
Here’s a sample code that demonstrates how to set up an Ethernet connection with the ESP32 and W5500 and publish and subscribe to any topic using Mqtt.
Output
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