# How to use Watchdog Chain

**URL:** <https://forum.legato.io/t/how-to-use-watchdog-chain/6068>\
**Category:** Legato Application Framework\
**Created:** [January 19, 2022, 12:24pm UTC](https://forum.legato.io/t/how-to-use-watchdog-chain/6068 "2022-01-19T12:24:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![david.geffers](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@david.geffers](https://forum.legato.io/u/david.geffers)\
**Post date:** [January 19, 2022, 12:24pm UTC](https://forum.legato.io/t/how-to-use-watchdog-chain/6068/1 "2022-01-19T12:24:43Z")

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I can not find any documentation on how to use watchdog chains.

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [January 19, 2022, 12:30pm UTC](https://forum.legato.io/t/how-to-use-watchdog-chain/6068/2 "2022-01-19T12:30:54Z")

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You can see the sample

> **[legato-af/apps/sample/watchdog at master · legatoproject/legato-af](https://github.com/legatoproject/legato-af/tree/master/apps/sample/watchdog)**
>
> master/apps/sample/watchdog