Flashing my tuya switches with tasmota

By Tim Naylor -
This was an exciting adventure.
I got these switches for $10 from someone who failed to make them work at their own house.

They are JMH CD303 Tuya switches. 
You can get them on Alibaba here: https://www.alibaba.com/product-detail/2018-US-Smart-Switch-WiFi-Tuya_60764782124.html?spm=a2700.details.maylikever.8.287e3376iYLvTg 
Initially I was just going to use the https://github.com/clach04/python-tuya method to integrate these into HA with local support. but then I got looking at that chip and it looked like an ESP8266, so I did a little digging.


I was able to flash the Tuya TYWE3S module with Tasmota.

Travis from digiblurDIY updated the Tasmota wiki with all the relevant information:


I soldered up my TYWE3S just like he did here:


The switches work perfectly with following settings:

They need to be set to switchmode# 3 in order to maintain the state.  Switchmodes 0-2 acted like switchmode 7 usually does.

With some tiny tweaks to the housing, it fits sideways in a 2 gang box just like DR Zzzs does here: http://drzzs.com/t1mountingtemp-sensor. I am putting these switches in all my bathrooms and as you can see I have this first one for my phireplace and its phan.

I love that I can control them remotely and that they just work!

They are rated to 10 amps like most of the switches.

I would consider a group buy if people have interest.
I am working on a "jig" to flash them so I don't have to solder the wires.



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