Identifying Erased Chipset on Unmarked Temperature Sensor from Pinout Analysis

Temperatura Sensor
Help to discovery the Chipset

Hey guys I receive 2 of them but the chineses they erase the chip info

I have no ideia wich one is that
I check the point with the pinout of the chip and I have it.





I cannot find ground at the chip, just on the battery

Both Beken and ESP seems to have UART in the same pins row as crystal (oscillator), so probably it's not them... have you tried to receive anything from UART via USB to UART converter?

This is also not T34, as T34 has built-in crystal.

Also not W600, crystal does not match...



I would suggest looking at crystal pins (XO, XI) and checking pinouts of known chips one by one

I've just compared several chips in my possession and could not find a match, I'll need to do a better something for these boards as my effort on this is a fail

@tadeu1

Can you make a better picture, without the lines ab that reflection? preferably on a darker surface as not all the pins are visible?

What I can say with certainty this is not TRS6260 or ECR6600, one potential candidate is W800 or BL602 but I need some better pictures to confirm (maybe multiple pictures would be best)