---
tag: m0255
title: LCD Sleep/Backlight Timeout
brief: Set/report the LCD Sleep Timeout.
author: thinkyhead

group: lcd
since: 2.0.9.4
requires: DISPLAY_SLEEP_MINUTES or LCD_BACKLIGHT_TIMEOUT
eeprom: true

codes: [ M255 ]
related: [ M256 ]

notes: Requires an LCD controller with a software controlled backlight or sleep function.

parameters:

- tag: S
  description: Timeout delay in minutes.
  values:
  - tag: minutes
    type: int

---

Set/report the LCD sleep / backlight timeout, in minutes. The display will go blank to save energy after your specified period has elapsed with no activity. The screen will wake up if it needs to display an important message.
