Identifying Chip for Flashing Smart Wifi Switch: Assistance Needed

p.kaczmarek2 wrote:

Still, in order to flash you need to locate RX and TX... hmm...

p.kaczmarek2 wrote:

The dot mark on the chip indicates where first pin is:

Are those UART signals routed out somewhere?

p.kaczmarek2 wrote:

I don't think it's actually that bad. What kind of soldering iron do you have? Do you have flux? I think it should still be relatively easy to solder to those points, given the assumption that you just have some flux and a thin soldering iron tip. First, I would add some flux, then I would add Pb solder. I would remove the excess solder from the pads with the soldering wick. Then, tin a tiny wire and try to solder it, soldering iron in one hand, wire in the second hand... I can try to do something like that on a video someday in a form of tutorial for our YT channel: https://www.youtube.com/@elektrodacom

Still, check Cutter as well. I can help you with OpenBeken config once you flash it.

p.kaczmarek2 wrote:

If we were from the same country, I could do the job for you

p.kaczmarek2 wrote:

I know how small they are, I've already did soldering to QFN pad here:
How to access hardware SPI port on CB2S? P16 (MOSI) GPIO breakout method

ferbulous wrote:

You could try printing this and connect the probe to the pads

https://www.thingiverse.com/thing:3615910

p.kaczmarek2 wrote:

How did you get so badly corrupted log? Check the PCB for shorts.

p.kaczmarek2 wrote:

I don't think so, just clean the soldering iron tip, add some flux, and clean the excess solder with the soldering wick.

p.kaczmarek2 wrote:

This means that OBK firmware boots but something is wrong later. Maybe you've removed some capacitors or the device does not get enough power to start.

seeindarkness wrote:

Here is the pinout for the device:
P6 - Wifi_led
P14 - Get
P15 - Relay
P24 - Btn