---
title: "Arduino Uno based NTP Server"
url: "https://maker.wiznet.io/WIZnet/projects/arduino-uno-based-ntp-server/"
markdown_url: "https://maker.wiznet.io/WIZnet/projects/arduino-uno-based-ntp-server/md"
type: "UCC: User Created Content"
author: "Lloyd's Demos"
author_url: "https://lloydm.net/Demos/GPS-NTP.html"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "Lloyd's Demos"
original_url: "https://lloydm.net/Demos/GPS-NTP.html"
published: "2023-02-14"
language: "en"
likes: 6
views: 456
comments: 1
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Arduino Uno based NTP Server

> Arduino Uno based NTP Server

Original author: Lloyd's Demos (source: https://lloydm.net/Demos/GPS-NTP.html)

## Article

Arduino Uno-based NTP Server

![Arduino in router client list](http://lloydm.net/Demos/NTP/Ethernet_shield+highlight.jpg)

Arduino in router client list

Ham radio digital modes require accurate computer time. On the other hand, appliance computer hardware clocks do not typically maintain accurate time in the absence of periodic correction. Clock adjustments are generally accomplished automatically via scheduled updates from an Internet time service. But what if Internet connectivity is not readily available, or is prohibitively expensive, such as when operating from a remote area, perhaps a wilderness park? In such a situation it would be convenient to synch the computer clock to an accurate time source that does not depend on Internet connectivity.

![GPS-based Arduino NTP server with Real-Time Clock](http://lloydm.net/Demos/NTP/Breadboard_NTP_Server-annotated.jpg)

GPS-based Arduino NTP server with Real-Time Clock

[Embedded media](https://www.youtube.com/embed/ECzCJnApQsw)

---

Source: https://maker.wiznet.io/WIZnet/projects/arduino-uno-based-ntp-server/