Flashing OpenBeken on Zemismart KES-606US-W3 3-gang Switch with WB3S Chip

Hi everyone,

I've just purchased this 3-gang switch (Zemismart KES-606US-W3).

This is the first time posting and I am a first-time user of OpenBeken firmware (I've only used Tasmota so far and I am not an expert by any means, just your regular Joe trying to remove his devices from the cloud).

I've searched for this particular model in the OpenBeken template repository but it's not in there.
So I've decided to tear down the device myself and post pictures of it.

From my inexperienced eye, I can see that it has a WB3S chip.

I've seen tutorials on YouTube where it's shown how to completely desolder the WB3S chip and replace it with an ESP one but since I'm not that good at soldering and I have basic cheap tools, I would like some help in flashing OpenBeken on this.

Is this compatible at all?
Do you spot any other chip that I should be aware of?
Anything that I can do to contribute to this?

Thank you

Thank you for your interest in OpenBeken. Your device looks like a very simple relays controller, there should be no problems with flashing it. There is even no TuyaMCU on board, just raw GPIOs are used.

The standard flashing procedure should work here. Also remember to make 2MB backup of Tuya firmware and use our GPIO extractor to get automatically new template.

I am unable to tell at the moment whether WB3S desoldering will be required. For now, I would suggest just soldering TX, RX, GND, and maybe 5V to the input of the AMS1117-3.3V, so it will provide 3.3V at the output.

Then use power-cycle method to flash. Do not solder CEN.
This should work. If it fails, I'll try to suggest something else. It can only fail if the RX or TX is used for some other purpose on the board, like for a button or something.
I am unable to tell from the photo whether there are traces on RX/TX or not:



You can refer to our tutorials here:
https://www.youtube.com/@elektrodacom

Let me know if you have any specific questions, I will do my best to help you.

I recently got this switch

Pin configuration:



@Murder3D Can you check if your switch light is linked to a single pin or not ?
Also, you don't need to desolder the chip just solder wires to 3.3v, GND, Tx and Rx