---
tag: m0190
title: Wait for Bed Temperature
brief: Wait for the bed to reach target temperature.
author: thinkyhead
contrib: shitcreek

group: thermal

codes: [ M190 ]
related: [ M140 ]

notes:
  - This command may block the command queue. Enable `EMERGENCY_PARSER` so that hosts can break in using [`M108`](/docs/gcode/M108.html).
  - Use [`M140`](/docs/gcode/M140.html) to set the bed temperature and proceed without waiting.
  - Requires one (1) of the parameters listed below.

parameters:
  -
    tag: I
    since: 2.0.6
    optional: true
    description: Material preset index. Overrides `S`.
    values:
      -
        type: int
        tag: index
  -
    tag: S
    optional: true
    description: Target temperature (wait only when heating).
    values:
      -
        tag: temp
        type: float
  -
    tag: R
    optional: true
    description: Target temperature (wait for cooling or heating).
    values:
      -
        tag: temp
        type: float

examples:
  -
    pre:
      - Set target bed temperature and wait (if heating)
    code:
      - M190 S80
  -
    pre:
      - Set target bed temperature and wait even if cooling
    code:
      - M190 R40

---

This command optionally sets a new target temperature for the heated bed and waits for the target temperature to be reached before proceeding. If the temperature is set with `S` then it waits *only when heating*.