Ethernet Shield W5100 Expansion Board for Arduino

The Ethernet Shield W5100 Expansion Board is a reliable and convenient way to add Ethernet connectivity to your Arduino-based applications. Designed for seamless integration, this shield is fully compatible with Arduino UNO, Mega2560, Leonardo, and other standard development boards, enabling your microcontroller to communicate with the internet through a standard RJ45 Ethernet interface.

Powered by the Wiznet W5100 chip, the shield supports multiple network protocols including TCP, UDP, ICMP, IPv4, and ARP, ensuring flexible and stable internet connectivity. It uses the SPI interface to communicate with the host board, making programming and networking smooth through the Ethernet library in the Arduino IDE.

An added bonus is the built-in microSD card slot, which lets you store logs or serve web content directly from the Arduino—perfect for remote data logging and server applications. With stackable headers it allows easy expansion with other shields, giving makers and engineers the flexibility to build complex systems.

Whether you’re working on IoT projects, home automation, industrial monitoring, or web-controlled systems, this Ethernet Shield is a powerful tool to bridge your devices to the internet.

Available now at eleberric.com, the trusted electronics store in Sri Lanka for Arduino-compatible hardware and IoT modules.

Specifications

• Chipset: Wiznet W5100

• Interface: SPI (uses pins 10–13 on UNO)

• Compatible Boards: Arduino UNO, Mega2560, Leonardo, and more

• Supported Protocols: TCP, UDP, ICMP, IPv4, ARP, IGMP

• Ethernet Port: Standard RJ45 10/100 Mbps

• MicroSD Card Slot: Available, connects via SPI

• Operating Voltage: 5V (from Arduino board)

• Indicators: LEDs for Power, Link, 100M, Full Duplex, Activity

• Dimensions: Approx. 68mm x 54mm

• Weight: Approx. 30g

Key Features

• Enables LAN/internet communication for Arduino boards

• Fully compatible with the official Arduino Ethernet library

• Supports simultaneous connections with up to 4 sockets

• Onboard microSD card slot for web servers or data storage

• Stackable header pins allow use with other Arduino shields

• Integrated LED indicators for network activity monitoring

• No soldering required—plug-and-play design

• Ideal for low-latency, wired networking in embedded systems

Applications

• IoT and Smart Home Projects: Connect sensors and devices to the web

• Web-Controlled Devices: Turn relays, motors, and appliances on/off via a browser

• Data Logging: Log temperature, humidity, or motion sensor data to SD card or cloud

• Remote Monitoring Systems: Industrial and Environmental Monitoring

• Web Servers: Host simple HTML pages on your Arduino for interactive control

• Educational Projects: Learn about Internet protocols and embedded networking

Enhance your Arduino with stable and fast internet access. Order the Ethernet Shield W5100 Expansion Board today from eleberric.com – your trusted source for electronic components in Sri Lanka.