Newer Costco Feit wifi dimmer switch

3.3v from the UART dongle may not be stable enough for flashing.
If the dongle is switchable (5V or 3V3), is it switching the Tx and Rx levels or just the Vcc?

Used an arduino to supply 3.3v and the beken chip flashed!

I’ve put together a guide that is specific to this FEIT Electric Smart WiFi Dimmer switch (where as the prior solution is for all Beken chips):

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Thanks. Great write up. I missed the part about connecting NRST to GND and that killed an hour, but otherwise, it worked well.

Based on what I read, the circle indicator on the switch can be disabled using the OEM app. Know how to do it using HA/OpenBK?