# MangOH Yellow R17 OTG not working

**URL:** <https://mangoh.discourse.group/t/mangoh-yellow-r17-otg-not-working/10322>\
**Category:** Uncategorized\
**Created:** [August 11, 2023, 1:18am UTC](https://mangoh.discourse.group/t/mangoh-yellow-r17-otg-not-working/10322 "2023-08-11T01:18:37Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![morganadams](https://avatars.discourse-cdn.com/v4/letter/m/3be4f8/32.png) [@morganadams](https://mangoh.discourse.group/u/morganadams)\
**Post date:** [August 11, 2023, 1:18am UTC](https://mangoh.discourse.group/t/mangoh-yellow-r17-otg-not-working/10322/1 "2023-08-11T01:18:37Z")

</div>

Hello,

I am trying to get Webcams working in R17 on a mango yellow. I have the modules loaded in happily but now connecting the hardware is an issue.

I have compiled R17 from scratch to include gstreamer and uvc drivers. When I use multiple different OTG cables the USB webcam does not appear in dmesg.

I have tried connecting a USB flash drive with the same cables and i get the error: "msm\_otg: 78d9000.usb: Could not get usb power\_supply

I have also tried the command 'find . -name “power\_supply”. The response that I get is the folder “/sys/class/power\_supply”. With nothing in it.

Has OTG been broken in the new R17 release? Or do I need to make changes to the build recipes to enable it?

Many Thanks.

---

<div class="post-metadata">

**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [August 11, 2023, 1:21am UTC](https://mangoh.discourse.group/t/mangoh-yellow-r17-otg-not-working/10322/2 "2023-08-11T01:21:53Z")

</div>

this is known issue:

> **[OTG doesn't work as expected on Release 17](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/5)**
>
> aren’t your custom board having the HSIC? BTW, have you tried to just connecting a USB thumb drive instead of the ethernet board?

As workaround, you might need to use R16.  
If you have mangoh green or mangoh red, you can use USB host connector which is using HSIC bus.

---

<div class="post-metadata">

**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [October 3, 2023, 8:22am UTC](https://mangoh.discourse.group/t/mangoh-yellow-r17-otg-not-working/10322/4 "2023-10-03T08:22:47Z")

</div>

you can download a fix build of R17 to work with USB OTG:

> **[Otg issue in R17, host mode does not work](https://forum.legato.io/t/otg-issue-in-r17-host-mode-does-not-work/6589/5)**
>
> We have test build of R17 which is for fixing USB OTG. I have tested with USB thumb drive, it is OK to read it: