---
title: "Building a GPIO test connector for Axia"
slug: "building-a-gpio-test-connector-for-axia"
updated: 2024-12-17T10:17:46Z
published: 2024-12-17T10:17:46Z
canonical: "docs.telosalliance.com/building-a-gpio-test-connector-for-axia"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.telosalliance.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Building a GPIO test connector for Axia

### Scope

Most Axia devices that have a GPIO port also contain a self-test utility. This document details how to build the GPIO test connector for these tests.

### Description

When running a self-test on any Axia device where there is a GPIO port, it will be necessary to build a test plug. This plug uses the outputs of the GPIO port to test the inputs. LEDs are used to give you a visual reference as to the status of the ports. These can also be useful in other situations where you might not be running a full test but testing some programming logic.

### Building the connector

To construct this connector, you will need;

- 15-pin male "D" connector
- Qty 5 - 20 ms standard 5v LED
- Qty 5 - 180 to 200-ohm resistors
- Hookup wire for jumpers
- Soldering tools

Here is the schematic showing the wiring of the test connector. If you would like to download a PDF of this drawing, [click here](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/gpio-port-tester.pdf?sv=2026-02-06&spr=https&st=2026-11-07T18%3A20%3A48Z&se=2026-11-07T19%3A20%3A48Z&sr=c&sp=r&sig=%2FHKqKDgEzn3dBHkl69lMq%2FF%2B3HbPonJODv6hh5RgUHw%3D).

![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/1c4f2575-3ed4-44c5-873a-e463560c18e4-image.png?sv=2026-02-06&spr=https&st=2026-11-07T18%3A20%3A48Z&se=2026-11-07T19%3A20%3A48Z&sr=c&sp=r&sig=%2FHKqKDgEzn3dBHkl69lMq%2FF%2B3HbPonJODv6hh5RgUHw%3D)

### Let us know how we can help

If you have further questions on this topic or have ideas about how we can improve this document, please [contact us](https://www.telosalliance.com/support-request).