Ethernet W5100 Shield Network Expansion Board with Micro SD Card Slot
Ethernet W5100 Shield Network Expansion Board for Arduino with Micro SD Card
The Ethernet W5100 Shield is a network expansion board for Arduino that provides stable 10/100 Mbps Ethernet connectivity and a Micro SD card slot for data storage. It allows your Arduino to connect to the internet for IoT applications and log sensor data directly to SD cards. The integrated W5100 chip ensures reliable performance with minimal setup.
Key Specifications
| Specification | Value |
|---|---|
| Ethernet Controller | W5100 |
| Network Speed | 10/100 Mbps |
| Micro SD Card Support | Up to 32 GB (FAT32 format) |
| Interface | SPI (Arduino headers) |
| Operating Voltage | 5V (supplied by Arduino) |
| Dimensions | Standard Arduino shield size (68.6 x 53.3 mm) |
What You Can Build With This
- IoT weather station that uploads data to a cloud server
- Web‑controlled home automation system with relay modules
- Data logger for temperature, humidity, or motion sensor readings
- Networked security camera with image capture stored on SD card
Compatibility
This shield is designed for Arduino Uno, Mega 2560, and Leonardo boards, plugging directly into the standard headers. It uses 5V logic and communicates via SPI, allowing stacking with other shields if the chip select pins are managed. Typical pairings include sensor breakout boards (DHT22, BMP280) for environmental monitoring.
Wiring Notes
Simply align the shield with the Arduino headers and press firmly. No additional wiring is needed. The Ethernet controller uses CS pin 10 by default, while the Micro SD card uses CS pin 4. Ensure these pins are not used by other devices when stacking shields.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Mega?
Yes, it works with Arduino Mega 2560. The shield fits the Mega's headers and uses the same SPI pins (50, 51, 52), making it fully compatible.
Can I use Ethernet and SD card simultaneously?
Absolutely. They are controlled via separate chip select pins (10 for Ethernet, 4 for SD), so you can read/write to the SD card while maintaining a network connection.
What SD card size is recommended?
We recommend using a micro SD card between 4 GB and 32 GB formatted as FAT32. Higher capacities are not guaranteed to work.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items