# Mangoh Yellow /dev/ttyHSO device

**URL:** <https://mangoh.discourse.group/t/mangoh-yellow-dev-ttyhso-device/3334>\
**Category:** mangOH Yellow\
**Created:** [January 3, 2020, 10:51pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-dev-ttyhso-device/3334 "2020-01-03T22:51:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vkurd](https://avatars.discourse-cdn.com/v4/letter/v/e47774/32.png) [@vkurd](https://mangoh.discourse.group/u/vkurd)\
**Post date:** [January 3, 2020, 10:51pm UTC](https://mangoh.discourse.group/t/mangoh-yellow-dev-ttyhso-device/3334/1 "2020-01-03T22:51:13Z")

</div>

We see the /dev/ttyHSO device.  
Do you recommend using it directly? Do we need to set any permissions in the Yocto build or Legato \*def files to do so?  
Firmware built from leaf 0.3.0, reported on device as SWI9X06Y\_02.32.02.00 c2e98c jenkins 2019/08/30 07:28:21

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<div class="post-metadata">

**Author:** ![Thong](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/thong/32/1017_2.png) [@Thong](https://mangoh.discourse.group/u/Thong)\
**Post date:** [January 6, 2020, 3:30am UTC](https://mangoh.discourse.group/t/mangoh-yellow-dev-ttyhso-device/3334/2 "2020-01-06T03:30:19Z")

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Hi vkurd

You can using UART device `/dev/ttyHS0` by legato app:

add to \*.adef file:

```auto
{
    device:
    {
        // replace these devices based on your module
        [rw]	/dev/ttyHS0	/dev/
    }
}

Or run manually by microcom:
"microcom -s 9600 /dev/ttyHS0"

Thanks
Thong Nguyen
```