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Unknown bootloader CRC - 0xB7BFA0CE - please report this on GitHub issues #29

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mchipser opened this issue Apr 26, 2024 · 7 comments

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@mchipser
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image

@kuba2k2
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kuba2k2 commented Apr 26, 2024

We will need more details. What kind of device is that? Is it a Tuya device? What bootloader version does it have?
We will also need a full firmware dump.

@mchipser
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mchipser commented Apr 26, 2024

I will try and get that info.. This is an Atomi string lights https://timgray.blogspot.com/2021/12/hacking-atomi-smart-wifi-color-string.html, I think this is the right dump...
readResult_BK7231N_QIO_2024-25-4-23-09-14.zip

@Cossid
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Cossid commented Apr 26, 2024

Looks like the 1.0.1 BK7231N bootloader, but the app is ESPHome, so not an original backup.

@mchipser
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Does cloudcutter save a backup of the firmware somewhere?

@Cossid
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Cossid commented Apr 26, 2024

No, it is not capable of doing firmware backups. Part of the exploit process is overwriting factory data anyway.

@mchipser
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I have another device, I will get it uploaded once I am able to dump it..

@kuba2k2
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kuba2k2 commented Apr 27, 2024

You might have flashed something incorrectly. If the dump has 1.0.1 bootloader, it should be recognized. If you've flashed something else and your device doesn't boot, it won't be recognized.
It's recommended to restore the full dump to fix the device.

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@kuba2k2 @mchipser @Cossid and others