---
product_id: 77492599
title: "Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino"
brand: "hiletgo"
price: "$22.77"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/77492599-ethernet-w5100-shield-network-expansion-board-w-micro-sd-card
store_origin: US
region: United States of America
---

# Fast Ethernet connectivity Web server ready Micro SD support Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino

**Brand:** hiletgo
**Price:** $22.77
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate Your Projects with Ethernet Power!

## Quick Answers

- **What is this?** Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino by hiletgo
- **How much does it cost?** $22.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/77492599-ethernet-w5100-shield-network-expansion-board-w-micro-sd-card)

## Best For

- hiletgo enthusiasts

## Why This Product

- Trusted hiletgo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Expand Your Storage:** Seamlessly read and write to mini SD/TF cards for enhanced data management.
- • **Lightweight & Compact:** Weighing only 31.8g, this board is perfect for portable projects.
- • **Transform Your Arduino:** Turn your Arduino into a powerful web server with ease!
- • **Effortless Connectivity:** Enjoy reliable USB and Ethernet connections for all your networking needs.
- • **Versatile Compatibility:** Works flawlessly with Arduino MEGA and Uno for ultimate flexibility.

## Overview

The Ethernet W5100 Shield Network Expansion Board by HiLetgo is designed to enhance your Arduino projects by enabling web server capabilities and supporting micro SD card storage. Weighing just 31.8g and compatible with both MEGA and Uno models, this board is a must-have for tech-savvy creators looking to expand their networking horizons.

## Description

Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino

## Features

- Material: FR4 + Electronic components
- The Arduino Ethernet W5100 network expansion module allows the Arduino to be a simple Web server
- Supports reading and writing mini SD / TF card
- With Micro SD card slot, supports SD card up to 2GB, supports MEGA, Uno

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | HiLetgo |
| Manufacturer | Generic |
| Country of Origin | China |
| Model number | 8541585431 |
| Item Weight | 31.8 g |
| Product Dimensions | 11.43 x 9.14 x 7.37 cm; 31.75 Grams |
| Item model number | 8541585431 |
| Item Height | 2.9 Inches |
| Item Width | 3.6 Inches |
| Auto Focus Included | No |
| Wireless Standard | Bluetooth |
| Connectivity Technology | USB, Ethernet |
| Compatible Device | Personal Computer |
| Are batteries included? | No |
| Hardware Interface Type | Ethernet |

## Product Details

- **Brand:** HiLetgo
- **Connectivity Technology:** Ethernet
- **Memory Storage Capacity:** 2 GB
- **Model Name:** HiLetgo W5100 Ethernet Network Shield
- **Ram Memory Installed Size:** 2 GB

## Images

![Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino - Image 1](https://m.media-amazon.com/images/I/51UWQp2xduL.jpg)
![Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino - Image 2](https://m.media-amazon.com/images/I/513L8c+ocyL.jpg)
![Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino - Image 3](https://m.media-amazon.com/images/I/414m9te3zNL.jpg)
![Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino - Image 4](https://m.media-amazon.com/images/I/41zwQvmnqDL.jpg)

## Questions & Answers

**Q: What's the purpose of the smd near the reset button?  it's not present on the official arduino version.**
A: Hello,The product I received was of such poor construction (bent and uneven pin lengths, excess solder blobs and flux, overall low quality) I didn't even try to use it. I purchased another one at Radio Shack made by SeedStudios, and it worked. The SMD is most likely a EEPROM if I had to guess. Sorry I cannot provide more information. Since that time I have moved on to Teensy 3.1 and LC's (ARM) and use a Wiznet module I purchased from Mouser for IP based connectivity. If you need more horsepower I recommend https://www.pjrc.com/teensy/teensy31.html , great forums and better product.

**Q: Will this ethernet shield work with the Arduino Due?**
A: I don't know, but I can't imagine why it wouldn't. The pin configuration is the same as an arduino r3 for all the pins that are important to the shield. However, if you are planning to use the lcd board, it has problems with the Ethernet shield.

**Q: Can this shield connect to your home network wirelessly, or do you need to plug in an ethernet cable to the board?**
A: No, it's an Ethernet sheild. You need to plug it in to an Ethernet socket. They make wireless shields though. They will have antennas. Sometimes you can get two different frequency bands for better range it requires multiple antennas.

**Q: is this compatable with arduino uno Rev 3?**
A: I have it on a Sainsmart UNO R3 clone and it is working well. So yes, it should.

## Frequently Bought Together

- HiLetgo W5100 Ethernet Network Shield W5100 Ethernet Expansion Board with SD Card Slot for Arduino UNO MEGA2560
- Arduino Uno REV3 [A000066]
- Arduino UNO R4 WiFi [ABX00087] - Renesas RA4M1 / ESP32-S3 - Wi-Fi, Bluetooth, USB-C, CAN, DAC, OP AMP, Qwiic Connector, 12x8 LED Matrix

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-21*