WiFi Smart Switch Relay Module for Home Automation,Add WiFi to Access Control Garage Door,eWelink app Remote Dry Contact,Works with Alexa,Google Assistant (5-32V 4CH)

Great solution for making almost anything (that can be operated by pushbutton) an IoT device. If you don't want to have to rely on bridges (or "hubs"), this works great. And the value is excellent.OK, so our pictures are pretty redundant to what is shown by the vendor but maybe help perceive scale a bit.We bought a few of these MHCOZY devices to get WiFi control of some access controls from wherever we are in the world. They boot up quickly, connect to WiFi quickly, and if the eWeLink app is to be believed the WiFi radios seem to get good reliable signals in relatively impossible places (steel parking bar motor housing, sliding door motor housing under a layer of sheetmetal and reinforced concrete, etc.).The USB connector is handy for powering up the device for initial configuration before moving it to where it will be used, and the 7-32VAC power inputs mean it can "vamp" power from almost any device it will be crammed into. We have one eWe2.4 running on 12VDC one place and on 24VDC in another. For me it was a snap to set up but on my first try, I was thwarted by needing to put my iPhone on our 2.4GHz WiFi instead of the 5GHz side.One tiny annoyance, the texture on the back of the ABS case means that double-sided tape doesn't stick quite as well as it could (3M VHB for the win). But it seems to stick well enough.This should not really be a review of eWeLink but in our scenario it was mandatory. So far the free version has been fine for us and it seems to play well with Siri. Which means I can do decadent things like saying "hey Siri open my door" when I have my hands full with packages and groceries. Yay.I'm addicted. What else can I automate now, mwahahahahaha...

I love you switches you are perfect for every little project!

I have had this for a few days, I am still testing it out, and it seems to work pretty well. Installation isn't quite as bad as others have said, the biggest challenge is that you need to register your email with the app, and it then sends you an email with a PIN which it says you must enter within 60 seconds AND type your password in those same 60 seconds. That's just about impossible to do on a phone if you want a secure password - but I think that the actual time limit is longer than 60 seconds.The other thing that I found a little weird is that the On/Off in the app doesn't correspond to the circuit being closed IF you connect your circuit through the NC (normally closed) connector. If you use that terminal, the circuit is closed when the app shows "Off", and open when the app shows "On" - when I would expect a closed circuit to be "On". If you lose power to the switch, the circuit continues to be closed, which is what I want.If you switch to the NO (normally open) connector, then the On/Off is correct in the app, however if your device loses power the switch opens and your switch is off. You can set the app to have a power-on state of either Off, On, or "last state" - so that helps a bit, but I would like to have my circuit Normally Closed ("on") and have the app show me that my switch is in the On position. The red LED light on the device also is reversed when you use the NC connector, being lit when the circuit is open.I am a little unsure about the connectivity stability of the device. As I write this review, having unplugged the device to switch the wires, it lost connectivity when plugged back in. I waited at least 5 minutes and it still did not connect. I then pressed the manual switch button, once I did that, it seemed to reconnect. I have the app set to tell me when it loses connectivity, and the first day it seemed to lose it every few hours.For now, I think it is 4-stars (with a ding because of the On/Off thing and the uncertainty about connectivity). The price is very nice, and it does the trick for me, which is to toggle the power to a device that is wifi-connected, but loses connectivity sometimes - so a way to "reboot" that device.

My 1998 vintage gate was supposed to be controlled via landline phone system (just the wires) but the long run of wires started having issues. I already had wifi via "TP-Link power line wifi extender" for a camera at the gate. The hook-up is very simple at the gate circuit board, in fact mine already had an open/close button wired in hidden inside the cover, I just had to hook onto those wires. I only need a short "button push/inching" and it came that way but I did confirm inching is easy to change. Regarding the actual wifi connection from this module, it wasn't dead simple just a little clunky but believe me at 62yo I only have a very basic understanding of all this wifi/computer stuff and I was able to make it work.cube so my wife can easily open or close the gate from inside the house. It was also easy to make it work thru my Alexa The eWeLink isn't hard to get to work and works really well after it's running. I think (if there is not one) I will start a Facebook group so people can ask questions and give tips. For doing things like this there absolutely is nothing that can do this job at this price. If you have one already please join the Facebook group and help other out. At this cheap price I am going to order another just to play with and maybe be able to give support. Going to name the group "MHCOZY wifi Controller"