---
title: "Ethernet add-on board for SPRESENSE"
url: "https://maker.wiznet.io/irina/resellers/ethernet-add-on-board-for-spresense/"
markdown_url: "https://maker.wiznet.io/irina/resellers/ethernet-add-on-board-for-spresense/md"
type: "VAR: Value-Added Reseller Products"
author: "switch science"
author_url: "https://www.switch-science.com/products/8075"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "switch science"
original_url: "https://www.switch-science.com/products/8075"
published: "2022-12-02"
language: "en"
likes: 3
views: 679
comments: 1
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Ethernet add-on board for SPRESENSE

> This is an Ethernet add-on board that operates on the SPRESENSE unit . Internet communication is possible by connecting to a wired router.

Original author: switch science (source: https://www.switch-science.com/products/8075)

## Article

![](https://maker.wiznet.io/upload/ckeditor5/94080612%5F1669974648%2Epng)

![](https://maker.wiznet.io/upload/ckeditor5/94080612%5F1669974654%2Epng)

**recautions for application development**

- The Arduino standard Ethernet library is modified and used.

- For TLS communication you need to compile additional libraries and root certificates together.

**Document**

- [circuit diagram](https://doc.switch-science.com/media/files/826a4163-faba-45b2-b218-e91a95dcc73c.pdf)

- [Reference information](https://qiita.com/baggio/items/650eeb2a80875afed07e)

- [Using Ethernet with SPRESENSE](https://www.switch-science.com/blogs/magazine/spresense_ethernet_addon)

---

Source: https://maker.wiznet.io/irina/resellers/ethernet-add-on-board-for-spresense/