# Batch Firmware Update Using fdt2.exe

**URL:** <https://forum.sierrawireless.com/t/batch-firmware-update-using-fdt2-exe/26066>\
**Category:** MC/EM Series\
**Created:** [January 26, 2022, 1:53am UTC](https://forum.sierrawireless.com/t/batch-firmware-update-using-fdt2-exe/26066 "2022-01-26T01:53:04Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [January 26, 2022, 2:58am UTC](https://forum.sierrawireless.com/t/batch-firmware-update-using-fdt2-exe/26066/2 "2022-01-26T02:58:47Z")

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how about typing AT!BOOTHOLD first on each module

Also did you miss a space after -usbport ?

> [@Multiple module firmware update](https://forum.sierrawireless.com/t/multiple-module-firmware-update/21744/7):
>
> 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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