---
id: gpio
title: GPIO
sidebar_label: GPIO
sidebar_position: 4
## GPIO IO12
For the Lora V2.1-1.6 and V2.1-1.8, Shorting IO12 to ground will progress through the screen pages and/or wake up the device. A simple push switch can be added for this purpose.
<img src="/img/hardware/lora32-v2-1.6-button.jpg" width="400" align="left" />
<img
src="/img/hardware/lora32-v2-1.6-button-example.jpg"
width="400"
align="left"
/>