# Multiple module firmware update

**URL:** <https://forum.sierrawireless.com/t/multiple-module-firmware-update/21744>\
**Category:** IoT Modules\
**Created:** [October 8, 2020, 12:47pm UTC](https://forum.sierrawireless.com/t/multiple-module-firmware-update/21744 "2020-10-08T12:47:19Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Wiviacom](https://avatars.discourse-cdn.com/v4/letter/w/5fc32e/32.png) [@Wiviacom](https://forum.sierrawireless.com/u/Wiviacom)\
**Post date:** [October 15, 2020, 5:23pm UTC](https://forum.sierrawireless.com/t/multiple-module-firmware-update/21744/7 "2020-10-15T17:23:56Z")

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> [@Donald](#):
>
> fdt2.exe -f -usbport # -usbhub # -multi

One more questions please: I am trying to figure out, what should be used as USB port number in this case? I am trying to use either the Loc ID from usbview.exe software or COM port number. None of them is working. Any thoughts please? THanks

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