---
title: I/O
slug: legacy-docs/io
docTags: 
createdAt: 2025-03-11T06:56:07.599Z
---

:::hint{type="warning"}
This page / section pertains to **BrightAuthor Classic**, our legacy app. **BrightSign Author **is our latest app for managing content and players.

Development of BrightAuthor Classic has largely ceased and the app will eventually be deprecated and replaced with BrightSign Author.
:::

Many BrightSign models feature a DA15 or Phoenix-style GPIO port for device communication and interactive input/output. Select **Input** or **Output** for each GPIO button to indicate whether it should be used to receive or send information.

:::hint{type="warning"}
The "button" numbers described here are not the same as GPIO "pin" numbers: Some pins act as power supply or ground, so they are not included in the button numbering scheme. See the [hardware manual](docId\:UYYJYeJ6qoJy1HKSbRlPu) associated with your player model to view a mapping of buttons to pins.
:::

![](https://api.archbee.com/api/optimize/511c8QBH-VHiwWnyzIwUb/GBZCThtFmZTQH_U0SDRRr_presentation-properites-io.png)