Kuba Szczodrzyński

Post what kind of error are you getting while flashing. Make sure to enable verbose logging in ltchiptool before that.

It would be best if you flashed a full factory firmware dump. Doing that, remember to uncheck "auto-detect" in ltchiptool and set start and skip to 0x0, length to 0x200000....

This is the most common error, and it usually means that there is something wrong with the way you supply power to the chip. Either the power supply is too...

Well, you'll need the correct bootloader to boot the firmware afterwards. But for getting the right flashing procedure, it's not needed on BK7231N.

Wow, this is huge.. I had no idea that the calibration is stored in the flash! Well, in fact, I didn't look at the BL0942/BL0937 drivers at all. All I...

Ah, right, so installing Kickstart overwrites the calibration already? That would mean it's not possible to do automatic config generation here, not that easily at least.

I looked at the partition table, 0x1D5000 is in the "key value store" partition, which is used by ESPHome for storing configuration data - so yes, it will get overwritten...

Note that the message shown in flashing section comes from BK7231 GUI tool, not ltchiptool. Otherwise nicely documented, with code snippets and what not.

The "unknown bootloader" is just a warning message, there are too many bootloader versions to list them all in the program. It should work properly nevertheless - are you experiencing...

This device is not connected to Tuya Cloud, it's a custom solution created by the manufacturer. UPK2ESPHome can't generate configuration for such devices. That being said, BK7238 is not currently...