I installed the Meross MSG100 garage door switch and followed the instructions for connecting it to the new ST app (Ver. 188.8.131.52) and Alexa (Echo Studio) device. I installed the door contact sensor as instructed and connected the trigger wires to my door opener switch contacts, then plugged in the USB power adapter. The setup process was confusing and there were a couple of times when the setup procedure would not proceed due to inability to find the device, yet the device somehow appeared in my ST app after I aborted installation, so I tried to use it. When I asked for the garage door status on Alexa, she replied with, “The garage door temperature is 74.4 degrees.” So there must be a temp sensor in the MSG100 somewhere. When I asked Alexa to open the garage door, she replied, “Garage door does not support that.” I asked her if the garage door was open, and she accurately replied, “Garage door is closed.” So I spent time trying to reinstall the ST skill from Meross, but this time I used the plain Meross skill instead of the Smart Meross skill. Now I finally got the whole mess working, after going into ST app and adding a PIN number to allow Alexa to open the door with voice commands. For those of you frustrated with trying to get this to work properly, I feel your pain, but wanted to share that finally everything works as expected including voice commands to open, close, and check status of door. The one thing I cannot do now, is get the temperature from the MSG100, which was available when I first installed it, but probably not supported by my subsequent reinstallation. My install was in USA on Oct. 14, 2020. Sorry if this post is not very helpful, but mainly I was trying to convey that installation was a confusing mess with mid-installation errors and lack of confirmations, but after a few reinstalls and adjusting settings in the ST app and the Alexa app, finally it all works.