W5500 SPI to Ethernet LAN Network Module

W5500 SPI to Ethernet LAN Network Module overview

The W5500 SPI to Ethernet LAN Network Module provides a compact, high-performance wired network interface for embedded systems and IoT devices. Based on the W5500 Ethernet controller, the module exposes a simple SPI interface and an integrated TCP/IP stack so your microcontroller can handle network communication with minimal software overhead.

Key features

• Chipset: W5500 Ethernet controller
• Interface: SPI for straightforward connection to Arduino, ESP32, STM32, and many other MCUs
• Integrated TCP/IP protocols: Supports TCP, UDP, ICMP, IPv4, ARP, IGMP, and PPPoE
• Socket support: Up to 8 simultaneous connections for robust networking
• Operating voltage: 3.3V logic (with 5V tolerant inputs)
• Compact PCB design for easy integration into embedded projects

Why choose the W5500 SPI Ethernet module

This W5500 SPI Ethernet module is designed to deliver stable and reliable wired connectivity for applications that require consistent throughput and low latency. Its hardware TCP/IP stack offloads network processing from your host MCU, freeing CPU cycles for application logic, real-time tasks, or data processing.

Applications and common use cases

• IoT and smart home devices that require wired connectivity for reliability
• Industrial automation and control systems with deterministic network needs
• Arduino, ESP32, STM32, and Raspberry Pi Ethernet projects
• Data logging, telemetry, and remote monitoring systems
• Embedded devices requiring secure and stable LAN access

Hardware interface and integration

Pinout and connections

The module communicates over SPI. Typical pins you will use include:

• VCC: 3.3V power input (module designed for 3.3V logic)
• GND: Ground
• MOSI: SPI Master Out Slave In
• MISO: SPI Master In Slave Out
• SCK: SPI Clock
• CS (SS): Chip Select for SPI
• RESET: Optional hardware reset input
• INT: Interrupt output (used for socket/event notifications)
• RJ45: Standard Ethernet connector for LAN cable

Software and library support

• Compatible with popular Arduino libraries that support W5500
• Works with ESP32 and STM32 using available W5500 driver libraries
• Example sketches and reference code are widely available to speed development

Electrical and performance specifications

• Operating voltage: 3.3V (5V tolerant inputs on control pins)
• Maximum simultaneous sockets: 8
• Protocols supported: TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE
• Interface: SPI (high-speed serial interface)

Integration tips

• Use a 3.3V regulator or level shifting if your host MCU runs at 5V to ensure signal compatibility.
• Enable hardware reset and interrupt pins in your firmware to improve reliability and responsiveness.
• Test with known-good libraries and example code to confirm wiring before implementing custom networking logic.

Ordering and additional information

The W5500 SPI Ethernet module is an economical, reliable option for adding wired LAN connectivity to embedded platforms. It is suitable for prototyping and production where stable LAN access is required. Images are for illustration purposes only.