[Solved] Programming Smart Switch SW02-1 with Tasmota/Esphome style firmware (and RX1 cut trick)

This is one of the cheaper smart switches bought on Aliexpress.

These are pictures of the manual:


The box:


The smart switch:




In order to program it, I soldered, as usual, TX1, RX1, GND, CEN; I was not able to use the 3.3v power supply from my USB/TTL converter due to the fact that probably the board uses too much current! I used an external 3.3v power supply connecting both GND together.



The communication doesn't start until I cut the RX signal from the board (it was very difficult!)


but, after that, everything goes as per your guide. The automatic configuration works perfectly.
Attached, you can find the JSON file.

Thanks for your good job.

You had to cut RX1 signal from the board because P10 (RX1) is used for a pair button that may have debouncing capacitor.

It's the same situation as here:


Btw, here is GPIO config:

And here is OBK template:

Probably I used the wrong "topic".

My intention was to support the forum with a new device not in the device's list.

Sure, no problem, I have added your entry to the devices list:
https://github.com/OpenBekenIOT/webapp/commit/9bcdca4e7551fb19b1f6268fb3b667c9b1347ce7
Just please next time paste the JSON to forum topic yourself and fill all the fields. Thanks!