# OTG doesn't work as expected on Release 17
**URL:** https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332
**Category:** WP Series
**Created:** [August 2, 2023, 1:51pm UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332 "2023-08-02T13:51:36Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@ash1](https://forum.sierrawireless.com/u/ash1)
#### Post date: [August 2, 2023, 1:51pm UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/1 "2023-08-02T13:51:36Z")
We’ve connected an OTG cable to MangOH Red board via CF3 connector (CN801), with a usb2eth chip (uses LAN95xx) as you can see below in the photo
When using release 16.3 the usb2eth is functioning correctly, however it doesn’t work after upgrading to release 17.
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### Author:  [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)
#### Post date: [August 2, 2023, 1:58pm UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/2 "2023-08-02T13:58:08Z")
here says mangoh red board does not support OTG
> **[WP7607 OTG as host](https://forum.legato.io/t/wp7607-otg-as-host/4447/2)**
>
> No sure that mangOH Red board implements USB OTG as described in the WP76xx Product Technical Specification document:
I remember USB OTG function should be supported in mangoh green board, you can give a try on mangoh green board.
BTW, does it work for this USB host port which is using HSIC bus?
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### Author:  [@ash1](https://forum.sierrawireless.com/u/ash1)
#### Post date: [August 3, 2023, 7:30am UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/3 "2023-08-03T07:30:04Z")
We’ve tried the same test on the mangOH Green board, and we had the same result, with R16 the OTG works correctly when connecting to the CF3 connector (CN311), and it doesn’t work on R17.
Regarding your question about the USB host port, we are not using this in our custom board, we are interested in USB+/- connected directly to WP7607 module.
Note: on the Red board we had to shorten the post terminal strip (CN804) to provide USB\_VBUS with power, as you can see here:
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### Author:  [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)
#### Post date: [August 3, 2023, 7:44am UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/5 "2023-08-03T07:44:23Z")
aren’t your custom board having the HSIC?
> [@R17, no eth0 in custom board](https://forum.sierrawireless.com/t/r17-no-eth0-in-custom-board/30210):
>
> After upgrading my WP7607 module to R17, it boots normally in mangOH-Green, but when I put it in a custom board (R16.3 used to function with no issue) eth0 is not present, (ifconfig doesn’t list eth0). It seems like an issue with low power mode on the usb host controller, btw I’ve tried executing echo NO\_SLEEP \> /sys/power/wake\_lock please find in the attachment two log files, one from the module when booting in mangOH-Green and the second is for the same module but in a custom board. [dev\_bo…](https://forum.sierrawireless.com/uploads/short-url/gryq9vqXj4hjevquqW0DwmWsiJP.txt)
BTW, have you tried to just connecting a USB thumb drive instead of the ethernet board?
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### Author:  [@ash1](https://forum.sierrawireless.com/u/ash1)
#### Post date: [August 3, 2023, 8:17am UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/6 "2023-08-03T08:17:42Z")
No we’re using the USB+/- lines directly connected to the WP7607 module.
the USB host connector works fine on both boards with R17.
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### Author:  [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)
#### Post date: [August 3, 2023, 8:23am UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/7 "2023-08-03T08:23:51Z")
i have connected the USB thumb drive in mangoh green board
it works in R16 but not in R17
I will report internally
As workaround, you might need to use R16 or route to USB host connector which is using HSIC bus.
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### Author:  [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)
#### Post date: [October 3, 2023, 8:00am UTC](https://forum.sierrawireless.com/t/otg-doesnt-work-as-expected-on-release-17/30332/9 "2023-10-03T08:00:39Z")
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:
> **[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: