FEIT dimmers
https://faceitsalon.com/wiring-diagram-for-a-feit-wi-fi-smart-dimmer-switch-collection/
For me these are advantageous when installed in 3 way circuits and my house has a lot of those. You can put a dimmer at each end or a regular switch at the far end. Now that they are down to $10 and Decora 3-way switches are $4 and 4-way switches are $15 it's not really worth replacing a toggle with a dumb Decora in some places, like my dining room and stairs.
When replacing a switched 3-way set up you can use one each, dumb switch and smart dimmer. You can also put a dimmer at each end, you put each switch on line power and use the traveler to let them talk to each other.
You can extend this to 4-way circuits, here is a picture someone posted: https://imgur.com/GIZwCqs This actually causes less confusion in my brain than conventional multipole switches. Sad perhaps? I think I might be able to replace the 4-way with a 4-way and have one dimmer + 2 switches.
Tuya usage
Basic 'normal' set up
- Register a Tuya account and log in.
- Add the Tuya integration to HA.
- Install the Tuya "Smart Life" app and launch it. (There is also a "TuyaSmart" app, both are supported in HA, I don't know the difference.)
- Power up the new dimmer.
- Configure it with Smart Life.
- Now it will just pop up in HA and you can treat it like any other HA device.
Reflashing
I have not succeeded in reflashing any of these yet. I pulled one apart to learn how to flash it and I think I fried the CPU.
It can be done by removing the WiFi chip or by attaching wires and cutting a trace. I tried removal and failed.
Notes on removing the ESP from the dimmer are here: https://community.smartthings.com/t/costco-cheap-feit-smart-dimmer-wifi/208142 Also note you can replace the ESP board with an ESP-01 if you break one.
Look for "Technowizard" for information on how to cut a trace on the board. https://community.home-assistant.io/t/costco-feit-tuya-based-wifi-dimmer-step-by-step-guide-newbie-friendly/284865/12
https://community.home-assistant.io/t/costco-feit-smart-dimmer-tuya-convert-tasmota/151390/5
Currently they are deployed in
- bathroom,
- kitchen island,
- breakfast area aka "nook",
- living room,
- dining room.
TWY2S pinout on the front, left to right
RST A0 I3 D4 D5
on the back, left to right
3V3 GND TX RX 12 14
There are some other marked pads (test points) not on the edge including
I0 IO2 RST GND
A set of components, https://github.com/nuttytree/ESPHome-Devices including Feit dimmers https://github.com/nuttytree/ESPHome-Devices/tree/master/components/tuya_light_plus
