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...

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"

In less than one hour after unboxing, I whipped up a 3-zone sprinkler controller. Unlike another comparable product i bought a couple of days ago (and returned), the process to wirelessly discover the unit (using the eWelink) was amazingly painless. You simply plug in a Micro-USB charger, run the app, do Quick Pairing, and in practically no time you should be able to starting clicking any or all of the four relays.Since I intended to use this 4-relay system to control a 3-zone sprinkler (so I didn't need all four, maybe I'll add another zone later), I needed the relays to stay on until turned off. This is not the default behavior. Instead, when you press a button on the app corresponding to one of the four relays, it will come on and turn off almost right away. To change this, you have to press the "mode" switch (one of the settings will change the relay switch behavior to stay on persistently). There is an "inching" behavior also, which is basically a programmable dwell time (if you need the relay to stay on a certain amount of time before turning off), which is controlled by the app. For sprinklers, the preferred method is to have a persistent "on" behavior, and then use Alexa (or other smart assistant) to control the on/off timing.One very slick feature of this unit is that you can choose to power the unit two ways. The first is to use a micro-USB. The second is to use 7-32V DC...or AC. The AC is convenient because standard electrically controlled sprinklers use a 24V AC supply. As such, you can use a single power supply to both power the relay board and to control your sprinklers. I did a quick installation, replacing the old, complicated $60 automatic sprinkler controller (which is a nightmare to program) with a single, simple Alexa-enabled controller for $20. You can simply bridge one of the AC power lines to a pin of each relay and connect the common to the other AC power line (24 V, not 115). The remain pins of each sprinkler are then connected to the remaining pin of each relay. Plugged it in, and it worked great. I was amazed at how quick this simple project came together.Integrating with Alexa took longer than the construction in the picture, but I eventually figured it out. You have to search for an Alexa skill called "eWelink Smart Home". I had a number of software crashes but eventually somehow got the device registered, and four individual devices were present in the Alexa device list. I promptly renamed three of them to "zone 1", "zone 2", and "zone 3". I then defined a few simple routines, each turning on a particular zone, waiting a fixed amount of time, then turning the zone off before advancing to the next zone, repeating the process for each zone. This is a Godsend, because I don't have to struggle with a flashlight in the garage, standing over a poorly designed gadget with small chiclet keys and a manual with tiny font print hoping I programmed it correctly. Now, you can just say "Alexa, turn on zone 1". This allows me to turn on each zone manually (with a voice command). I also programmed a pre-set number of routines to run the zones automatically through the week.Anyway, I should have waited to write this review, but was pretty thrilled to be able to knock out a simple project so quickly and effectively, and hope to inspire others to try.

I've bought three of these and have been using them for well over a two years and they work great! I flashed Tasmota on mine and it seemlessly integrates with Alexa to allow remote opening and closing of the garage door. Flashing Tasmota was a bit tricky because I couldn't find any docs at the time but I've attached pics with the pin-outs for flashing. To get the board into flashing mode using your follow this:1. Hold down both buttons before plugging in. (Plugging-in being the COM board you are using to flash with.2. Release buttons after plugging in.- No lights will be on.3. Press and Release button closest to the outer edge.- You will see a blue light flash once after the button is pressed4. You are ready to start flashing at this point.