That switch uses the smartlife app. There are many other inexpensive Chinese Wi-Fi switches that also use the same app.
There are a couple of different ways to integrate with it. There is an IFTTT channel, so you can just try that, although recently it has stopped working for anything except basic on/off. But it does still seem to be working for that.
And here is the Alexa skill for smart life. There’s some more technical information in the reviews, particularly about network requirements.
The following link is to the official website for the company that creates the smart life app. If you have problem with the app itself or with the IFTTT channel, these are the people you contact:
If your Chinese Switch uses the eWeLink app instead, you can use the same approach with that app’s IFTTT channel:
A different approach: Alexa as the "man in the middle"
Some community members have even set up a separate android device to speak commands to an echo. It’s clunky, but it can work for some households.
Also some of the individual models can work with the free Stringify app, so that may be another option
There are also a couple of community – created integrations. Just search for SmartLife. ( that’s a Chinese company, it has nothing to do with Samsung or SmartThings, just a somewhat similar name).
My only concern is that If This is like other similar switches, it won’t have any safety certifications, and speaking just for myself, I don’t wire anything into the mains, even a light switch, if it doesn’t have safety certifications. The convenience of home automation isn’t worth burning down the house. But that’s just me.
TPLink/Kasa brand devices
If you found this FAQ but you have the TPLink or Kasa brand WiFi Devices, those do not use the SmartLife App. They have their own app.
Fortunately, there are two good integrations available for those, one which is cloud to cloud and one which is to the hub but requires a “man in the middle” server. See the following thread:
Is there any firmware similar to the Sonoff switch firmware developed for the Tuya SmartLife based wall switches? The Sonoff firmware and DH allow Sonoff switches to be controlled directly from ST without using third party cloud/app. Original Sonoff devices will have to use eWeLink but after flashed with the specific custom firmware and using custom DH, they can be controlled via ST directly.
I would be looking for something like this too. Ewelink light switches flashed over to a custom firmware to control directly with ST. IFTTT is what I set up for now but it’s strange and turns off devices on its own at times