The Arduino Ethernet Shield enables your Arduino board to connect to the internet, leveraging the Wiznet W5100 Ethernet chip. This chip provides a complete network (IP) stack that supports both TCP and UDP protocols, making it ideal for internet-based projects. The Ethernet W5100 Shield also features a Micro SD card slot, allowing you to store or retrieve files over the network, and supports up to four simultaneous socket connections.
To get started, you can use the Ethernet library to write sketches that connect your Arduino to the internet. The shield is designed to connect to your Arduino board via long wire-wrap headers, ensuring the pin layout remains intact, and it allows you to stack additional shields on top without interference.
This shield is compatible with the latest Arduino UNO R3 and Mega boards. It includes a standard RJ-45 Ethernet port, with an integrated line transformer, and supports Power over Ethernet (PoE). The onboard Micro SD card slot is accessible through the SD library, and the SS pin is located on Pin 4. Please note that the shield no longer supports the full-size SD card slot available in earlier revisions.
The updated version of this Ethernet Shield also includes a reset controller, ensuring the W5100 Ethernet module resets correctly on power-up—a feature that was not available in earlier versions, which required manual resetting when used with the Mega board.
With this Ethernet Shield, connecting your Arduino to the internet and managing network connections becomes a simple, plug-and-play process. It works with both Arduino UNO 328 and MEGA 2560/1280 boards, providing an easy solution for networking, file management, and internet-enabled projects.
Features
Based on the W5100Based on the Wiznet W5100 allows an Arduino board to connect to the internet.
Stackable Design, can directly be supported by for Arduino official Ethernet Library.
Supports up to four simultaneous socket connections
Can be used to store files for serving over the network.
Compatible with the for Arduino Duemilanove (168 or 328), Uno as well as Mega (1280/2560).
Can be accessed using the Mini SD TF library.
The current shield has a Power over Ethernet (PoE) module designed to extract power from a conventional twisted pair Category 5 Ethernet cable.
IEEE802.3af compliant
Low output ripple and noise (100mVpp)
Overload and short-circuit protection
1500V isolation (input to output)
Specification
IC Chip
Wiznet W5100
Connection speed
10/100Mb
Operating Voltage (VDC)
5
Length (mm)
75
Width (mm)
54
Height (mm)
25
Weight (gm)
78
Package Includes
1 x Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino
The Ethernet W5100 Shield Network Expansion Board w/ Micro SD is an Arduino-compatible add-on that equips your board with wired LAN connectivity and local file storage. Based on the Wiznet W5100 chip, it enables TCP/IP or UDP communication and offers a built-in Micro SD card slot for serving web pages or logging data.
Key Features of Ethernet W5100 Shield Network Expansion Board w/ Micro SD
Authentic Wiznet W5100 Ethernet Chip: Full TCP/IP stack with support for TCP, UDP, ICMP, IPv4, ARP, IGMP, and PPPoE protocols.
Micro SD Card Slot: Store and serve HTML, images or log data directly from the on-board TF card slot using the Mini SD TF library.
Four Simultaneous Sockets: Handle up to four network connections at once for web servers, clients, or peer-to-peer applications.
IEEE802.3af Compliant: Built-in PoE support allows powering the shield via a PoE injector or switch without extra modules.
Stackable Design: Long wire-wrap headers maintain the Arduino pin layout and accept additional shields for expansion.
Fast Shipping from Zbotic: Ready stock in India and dispatch within 24 hours for non backordered products.
Applications and Use Cases
Hosting a web interface on Arduino for home automation or sensor monitoring.
Logging sensor data directly to a Micro SD card and accessing logs over the LAN.
Building simple IoT devices that push or pull data via HTTP or MQTT over Ethernet.
Serving images or configuration files from the SD card to remote clients.
Creating networked multiplayer games or chat applications using UDP sockets.
Enabling remote firmware or content updates from a local SD server on the network.
How to Use Ethernet W5100 Shield Network Expansion Board w/ Micro SD
Plug the shield onto your Arduino headers, install the official Ethernet and Mini SD TF libraries in the Arduino IDE, then load an example sketch. Configure your MAC and IP addresses in code, insert a FAT-formatted Micro SD card, and start the Ethernet.begin() and SD.begin() routines to establish network and storage functionality.
Why Buy from Zbotic?
Genuine Products: All items sourced from authorized distributors
Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
Free Shipping: Free delivery on qualifying orders
COD Available: Cash on Delivery, UPI, cards, net banking
Technical Support: Expert help for setup and troubleshooting
Easy Returns: Hassle-free replacement for defective products
Frequently Asked Questions
Can I use Power over Ethernet (PoE) with this shield?
The shield’s Ethernet port is IEEE802.3af compliant. To use PoE, connect the shield to a PoE injector or switch; no additional hardware is required for basic PoE support.
Which Micro SD cards are supported?
The onboard TF slot supports standard SD and Micro SD cards up to 32 GB formatted FAT32. Use the Mini SD TF library for file operations in your sketch.
How do I connect it to an Arduino UNO?
Slide the Ethernet Shield onto your Arduino UNO’s headers. Install the Arduino Ethernet and SD libraries, then use example sketches to set up the MAC/IP address and initialize the SD card.
The Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino is a versatile shield for arduino used across a wide range of applications including electronics projects, DIY builds, prototyping, and educational experiments.
Common use cases:
Integrating into a custom electronics project
Learning and experimenting with circuits
Replacing or upgrading components in existing setups
This product is ideal for electronics enthusiasts, engineers, and students.
Technical Tip: Always verify voltage and current requirements before connecting to your circuit. Check datasheets for detailed specifications and pin configurations.
Shipping & Delivery
Free shipping on orders above ₹999 across India
Dispatched within 1-3 business days
Expected delivery: 3-7 business days depending on location
Secure packaging to ensure safe transit of electronic components
Genuine Arduino product sourced from authorized channels
Weight
0.03 kg
Dimensions
3 × 4 × 2 cm
15 Days Warranty
Please note that this item is only covered by a standard supplier warranty against manufacturing defects for a period of 15days from the time of delivery. It is important to understand that only manufacturing defects are covered under this warranty, and any other issues will not be considered for reimbursement or replacement. We strongly advise inspecting the product upon delivery to ensure it meets your expectations. In case of any manufacturing defects, we guarantee reimbursement or replacement.
What voids warranty:
If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.
Neha Parekh (verified owner) –
Okay Ethernet W5100 Shield Network Expansion Board. Works but had to troubleshoot driver issues initially.
Kartik Gill (verified owner) –
Decent quality Ethernet W5100 Shield Network Expansion Board. Some pins needed cleaning but works fine now.
Sonali Garg (verified owner) –
This Ethernet W5100 Shield Network Expansion Board is a must-have for any maker. Works perfectly with Arduino IDE.
Amit Pandey (verified owner) –
Love this Ethernet W5100 Shield Network Expansion Board. Using it for my home automation project, very reliable.
Rishabh Gupta (verified owner) –
Very satisfied with this Ethernet W5100 Shield Network Expansion Board. Fast shipping and genuine components. Zbotic is the best!
Yash Shetty (verified owner) –
Average quality Ethernet W5100 Shield Network Expansion Board. Functional but packaging was minimal.
Rishabh Desai (verified owner) –
Good Ethernet W5100 Shield Network Expansion Board. Works well with Arduino IDE. Headers could be soldered more neatly.
Parth Choudhury (verified owner) –
Average quality Ethernet W5100 Shield Network Expansion Board. Functional but packaging was minimal.
Krishna Kumar (verified owner) –
Great quality Ethernet W5100 Shield Network Expansion Board. Uploaded my first sketch and it worked flawlessly. Ideal for beginners.
Advik Gupta (verified owner) –
Great Ethernet W5100 Shield Network Expansion Board for my college mini project. Got good marks thanks to this working perfectly!
Mahesh Vohra (verified owner) –
Pretty good Ethernet W5100 Shield Network Expansion Board. Compatible with most libraries. Happy with the purchase.
Vijay Gupta (verified owner) –
Excellent Ethernet W5100 Shield Network Expansion Board! Built a weather station with this. Everything works as expected.
Farhan Ghosh (verified owner) –
Excellent Ethernet W5100 Shield Network Expansion Board! Perfect for my Arduino project. All pins working correctly.
Suresh Dhillon (verified owner) –
Using this Ethernet W5100 Shield Network Expansion Board for my smart farming project. Reliable and easy to interface.
Divyansh Tiwari (verified owner) –
Bought multiple units of this Ethernet W5100 Shield Network Expansion Board. All working great. Best store for Arduino components.
Anushka Malhotra –
Very satisfied with this Ethernet W5100 Shield Network Expansion Board. Fast shipping and genuine components. Zbotic is the best!
Tanvi Singh (verified owner) –
Perfect Ethernet W5100 Shield Network Expansion Board for IoT projects. Easy to set up and program. Great documentation available online.
Chetan Chopra –
Pretty good Ethernet W5100 Shield Network Expansion Board. Compatible with most libraries. Happy with the purchase.
Aanya Sethi (verified owner) –
Great quality Ethernet W5100 Shield Network Expansion Board. Uploaded my first sketch and it worked flawlessly. Ideal for beginners.
Vijay Rawat (verified owner) –
Great Ethernet W5100 Shield Network Expansion Board for my college mini project. Got good marks thanks to this working perfectly!
Tejas Parekh (verified owner) –
Perfect Ethernet W5100 Shield Network Expansion Board for IoT projects. Easy to set up and program. Great documentation available online.
Naman Malhotra (verified owner) –
Great quality Ethernet W5100 Shield Network Expansion Board. Uploaded my first sketch and it worked flawlessly. Ideal for beginners.
Om Naidu (verified owner) –
Pretty good Ethernet W5100 Shield Network Expansion Board. Compatible with most libraries. Happy with the purchase.
Amit Saini (verified owner) –
This Ethernet W5100 Shield Network Expansion Board is a must-have for any maker. Works perfectly with Arduino IDE.
Mukesh Chopra (verified owner) –
Love this Ethernet W5100 Shield Network Expansion Board. Using it for my home automation project, very reliable.
Manoj Parekh (verified owner) –
Nice Ethernet W5100 Shield Network Expansion Board for the price. Using it in my college project, performs well.
Mukesh Dave (verified owner) –
This Ethernet W5100 Shield Network Expansion Board made my robotics project so much easier. Highly recommended for students.
Aditya Tiwari (verified owner) –
Love this Ethernet W5100 Shield Network Expansion Board. Using it for my home automation project, very reliable.
Vidya Rathore –
Fantastic Ethernet W5100 Shield Network Expansion Board! All GPIO pins tested and working. Great for prototyping.
Eshan Sethi (verified owner) –
Bought multiple units of this Ethernet W5100 Shield Network Expansion Board. All working great. Best store for Arduino components.
Bhavna Kulkarni (verified owner) –
Fantastic Ethernet W5100 Shield Network Expansion Board! All GPIO pins tested and working. Great for prototyping.
Mayank Arora (verified owner) –
Decent quality Ethernet W5100 Shield Network Expansion Board. Some pins needed cleaning but works fine now.
Uday Saxena (verified owner) –
Superb Ethernet W5100 Shield Network Expansion Board! Compatible with all my existing Arduino shields and libraries.
Shivam Deshpande (verified owner) –
Decent quality Ethernet W5100 Shield Network Expansion Board. Some pins needed cleaning but works fine now.