# Shield Ethernet W5100 with MicroSD

> Ethernet shield based on the Wiznet W5100, featuring a TCP/UDP stack with up to 4 simultaneous sockets. Allows Arduino boards to connect to the internet or LAN using the Ethernet library. Includes a MicroSD slot for storing and serving files over the network, accessible via the SD library. Compatible with Arduino 2009, UNO, Mega 1280, Mega 2560, Nano, Duemilanove. Dimensions: 75 x 55 x 25mm. Mounts directly onto the compatible development board.

- Page: https://sigmanortec.ro/en/shield-ethernet-w5100-with-microsd
- Price: 41.43 RON
- Availability: Out of stock
- Reference: 9080 · EAN: 5943145083390
- Category: Mechatronics and IoT > Shields and Expansion Boards
- Package (shipping data): 0.027 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 04:49 (Europe/Bucharest)

## Description

Allows quick connection of Arduino boards to the internet or LAN for IoT projects and remote control, based on Wiznet W5100 with TCP UDP stack and up to 4 simultaneous sockets, includes MicroSD slot for storing and serving files over the network accessible with the SD library, mounts directly on UNO Mega Nano Duemilanove and other compatible boards.
Ethernet expansion board compatible with Arduino 2009, UNO, Mega 1280, Mega 2560, Nano, Duemilanove.
The board also has a MicroSD card slot that can be used to store files to be sent over the network. The card can be accessed with the SD library
With this shield, the development board can be connected to the Internet using the Ethernet library.
Wiznet W5100 offers a network (IP) stack capable of TCP and UDP and supports up to four simultaneous socket connections.
Specifications:
Dimensions mm: 75 x 55 x 25mm
How to use: Places directly on compatible development boards