# How to update Knot firmware?

**URL:** <https://forum.intech.studio/t/how-to-update-knot-firmware/581>\
**Category:** Knot\
**Created:** [July 9, 2025, 6:31pm UTC](https://forum.intech.studio/t/how-to-update-knot-firmware/581 "2025-07-09T18:31:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![user187](https://forum.intech.studio/user_avatar/forum.intech.studio/user187/32/362_2.png) [@user187](https://forum.intech.studio/u/user187)\
**Post date:** [July 9, 2025, 6:31pm UTC](https://forum.intech.studio/t/how-to-update-knot-firmware/581/1 "2025-07-09T18:31:57Z")

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I’m trying to update the knot firmware but I keep getting the following error message:

An unexpected error is keeping you from copying the file. If you continue to receive this error, you can use the error code to search for help with this problem. Error: 0x800701B1: A device which does not exist was specified.

I hold mode, plug in, it blinks to green and opens file explorer (windows 11). I copy the .uf2 file to the device, it blinks yellow then flashing white and the error pops up. I’ve also tried copying using command prompt and it looks like its copied and device blinks yellow and then flashes white.

INFO\_UF2.TXT still says this:  
TinyUF2 Bootloader 7cc8b8c - tinyusb (0.15.0-331-ge3b3229d6)  
Model: Intech Studio Knot  
Board-ID: ESP32S3-Knot  
Date: May 8 2023

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<div class="post-metadata">

**Author:** ![narayb](https://forum.intech.studio/letter_avatar_proxy/v4/letter/n/b2d939/32.png) [@narayb](https://forum.intech.studio/u/narayb)\
**Post date:** [July 10, 2025, 8:58am UTC](https://forum.intech.studio/t/how-to-update-knot-firmware/581/2 "2025-07-10T08:58:16Z")

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Hi there!

A couple of things. Currently there’s no way to tell what FW version is actually running on Knot. The file you’re looking at, and its date, is actually the version of the **bootloader** not the firmware. Which is why it remains unchanged no matter what you do.

The firmware version should be updated even when Windows says it was unsuccessful, if you can see the lights blink on the Knot after moving the FW file to the removable device. The message from Windows mostly just shows that the ESP32 bootloader implementation is far from ideal.