Virtual Switch, Alexa and Ifttt

[MinerJason (Jason)]

@nathancu

Alexa is not seeing switches as triggers for routines because Alexa cannot use a switch as a trigger for a routine to do what you want, you need a specific type of virtual switch that shows up as BOTH a switch and a contact sensor because Alexa CAN trigger on a contact sensor.

Now that you have your location issues sorted (good job BTW) Search the forums - there’s a post that details exactly how to setup the kind of virtual device you’re going to need.

Yep, all of this. And here’s the link to the FAQ discussing how to create a virtual device that can be used in Alexa to trigger routines:
https://community.smartthings.com/t/faq-can-i-trigger-an-echo-action-without-speaking-to-it/117918

@Mario_De_Carli

The other issue is how to make alexa to see the aqara temperature/humidity sensor

As I posted in the other thread, you simply need to add one of the following to the metadata in the device handler:
capability “Thermostat”
capability “Contact Sensor”
capability “Motion Sensor”

Which one you use is up to you, but be aware that this will enable commands that won’t do anything, and potentially result in confusing answers when you query Alexa about them, so choose wisely.
Once you do that, use the SmartThings app to give permission to Alexa for those devices (classic app would be Automation > SmartApps > Amazon Alexa > Device Authorization, don’t remember offhand where to do this in the new app). Once that is done have Alexa discover devices again.