# 0 set calibration

**URL:** <https://forum.realdash.net/t/0-set-calibration/7974>\
**Category:** General RealDash discussion\
**Created:** [March 31, 2025, 2:14pm UTC](https://forum.realdash.net/t/0-set-calibration/7974 "2025-03-31T14:14:24Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Lilgarage](https://forum.realdash.net/letter_avatar_proxy/v4/letter/l/35a633/32.png) [@Lilgarage](https://forum.realdash.net/u/Lilgarage)\
**Post date:** [March 31, 2025, 2:14pm UTC](https://forum.realdash.net/t/0-set-calibration/7974/1 "2025-03-31T14:14:24Z")

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I would like to implement 0-point calibration with a button.

I have loaded the suspension strokes into App.  
I want the stop to calibrate the stroke value (ex 20mm) as 0mm and return a negative value if the suspension extends.  
I thought I could use the button function set value or set value(fomla), but is there any other better way?

 ![image](https://forum.realdash.net/uploads/default/original/2X/3/3909bcc1dba7df208ebcc59f05c0e9ea2a2583af.png)

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**Author:** ![realdashdev](https://forum.realdash.net/user_avatar/forum.realdash.net/realdashdev/32/6_2.png) [@realdashdev](https://forum.realdash.net/u/realdashdev)\
**Post date:** [April 1, 2025, 5:17am UTC](https://forum.realdash.net/t/0-set-calibration/7974/2 "2025-04-01T05:17:11Z")

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For this you need to set a Dash Data X value to your current stroke value and then have gauges that show stroke - Dash Data X. Recommend using Dash Data values instead of Dummy values as Dash Data values are saved between instances.

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<div class="post-metadata">

**Author:** ![Lilgarage](https://forum.realdash.net/letter_avatar_proxy/v4/letter/l/35a633/32.png) [@Lilgarage](https://forum.realdash.net/u/Lilgarage)\
**Post date:** [May 3, 2025, 2:59am UTC](https://forum.realdash.net/t/0-set-calibration/7974/3 "2025-05-03T02:59:42Z")

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Thanks for the advice  
works well

I want to reset all 4 values at the same time, is there a good way to do this?  
My solution is to create 4 buttons.

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<div class="post-metadata">

**Author:** ![Lilgarage](https://forum.realdash.net/letter_avatar_proxy/v4/letter/l/35a633/32.png) [@Lilgarage](https://forum.realdash.net/u/Lilgarage)\
**Post date:** [May 4, 2025, 11:03am UTC](https://forum.realdash.net/t/0-set-calibration/7974/4 "2025-05-04T11:03:20Z")

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I solved it using the trigger function  
Thanks