W5500 Ethernet Shield for Arduino UNO & Mega – 10/100 Mbps Network Module with Micro-SD Slot
The W5500 Ethernet Shield is a high-performance plug-and-play networking expansion board that gives your Arduino UNO or Arduino Mega instant wired Ethernet connectivity. At its core lies the WIZnet W5500 chip — a hardwired TCP/IP embedded Ethernet controller with an integrated 32 KB buffer that offloads all protocol processing from your main MCU, leaving more RAM and CPU cycles free for your application code. This makes it dramatically faster and more reliable than older W5100-based shields while maintaining full pin compatibility with the Arduino UNO Rev3 footprint. The shield delivers true 10/100 Mbps auto-negotiating Ethernet over a standard RJ-45 jack with a built-in line transformer, supporting TCP, UDP, ICMP, IPv4, ARP, IGMP, and PPPoE protocols. It handles up to eight simultaneous socket connections, making it suitable for everything from simple web servers and data loggers to multi-client MQTT brokers and industrial sensor nodes. An onboard micro-SD card slot enables local storage for web assets, sensor logs, or configuration files — all accessible over SPI. Whether you're building a home automation hub, a remote weather station that uploads data to the cloud, or an IoT prototype that needs rock-solid wired connectivity, this shield plugs in and works. The standard Arduino Ethernet library provides ready-to-use examples for WebServer, WebClient, UDP send/receive, and more. With no extra drivers or configuration headaches, students, hobbyists, and professional developers can go from unboxing to a working network connection in minutes. This is the most cost-effective way to bring reliable wired networking to your Arduino projects.
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₹808.00
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About W5500 Ethernet Shield for Arduino UNO & Mega – 10/100 Mbps Network Module with Micro-SD Slot
Technical Specifications
| Connector | RJ-45 with integrated magnetics/line transformer |
|---|---|
| Interface | SPI (MOSI, MISO, SCK, SS) |
| PCB Dimensions | ~69 mm x 53 mm (standard Arduino shield size) |
| Internal Buffer | 32 KB |
| Onboard Storage | Micro-SD card slot (SPI) |
| Connection Speed | 10/100 Mbps (auto-negotiation) |
| Compatible Boards | Arduino UNO Rev3, Arduino Mega 1280/2560, Leonardo (check pinout) |
| Operating Voltage | 5V (supplied by Arduino board) |
| Ethernet Controller | WIZnet W5500 |
| Supported Protocols | TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE |
| Chip Select (SD Card) | Digital Pin 4 |
| Chip Select (Ethernet) | Digital Pin 10 |
| Max Simultaneous Sockets | 8 |
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