SEHOMY1 Pack WiFi Door Sensor Alarm, Smart Door Open Contact Sensor Realtime APP Notification Compatible with Alexa Google Assistant, Home Security for Safety, Wireless Window Detector Burglar Alert

I put this on my storage container behind my garage that I like to forget to lock!

My rating is based on 2 main areas: problems with setup and problems with Alexa integration.Setup - I used both suggested apps, and neither would work with the wifi mode, on any of the 4 units. I was about to give up, but then tried the 2nd mode, and had success. The only way I could do this is to try the first mode, let attempt to connect for 2 minutes, fail, and then the button would appear to try the other mode. Pain in the booty for 4 units, I could not find any way to directly jump to the second mode.Alexa - If you're reading this, you likely read multiple other reviews with Alexa integration issues. Initially, I was able to set up routines easily, and I quickly had all 4 set up to do a variety of things including notifications in the Alexa app, voice announcements at specific Alexa devices, and turning on lights. Tested them all, all worked; thought I was one of the lucky ones. Then an hour or two the problems appeared; I started getting periodic false notifications on the balcony door unit. The SmartLife app was fine, no recorded openings, but it was Alexa giving notifications, without opening/closing the door, without notifications in the SmartLife app history (it nicely keeps a history of times and status as it registers an opening/closing). Then, the next day the front door unit started giving false readings. It's now the 3rd day, and I estimate I'd have 15-20 false notifications from the Alexa app, on 2 of the 4 units, both of which have near full batteries, and excellent wifi connection (closest ones to my wifi hub).If you're buying these based on the idea of using them to set up with Alexa routines, I'd give them a pass. If you just want SmartLife app notifications and history, they're a maybe. As long as the SmartLife app continues to work consistently (gives me correct notifications when doors open/close, keeps the history, etc.) then I'll keep them, even if I'm disappointed I can't trust them to work with Alexa.Edit - reducing rating by another star, as now on the 4th day of use one unit completely fails to register opening at all, it always shows closed in both Smartlife and Alexa. Batteries still in good shape, about 80% full.

We use this as a door alarm for our store. We can be in other parts of the store or even down the block and an alarm sounds on our phone when someone enters.

Uses batteries like crazy, only lasts about 2 or 3 weeks, could be bad batteries but holy crap. It works though when the batteries are working, and links with Alexa pretty easy too

These are easy to install and easy to get working. The Integration with Alexa was easy, making it easy to get messages when the status of a sensor changes.The only problem I had was that when one of them stopped working, I didn't know about it. The battery went dead, but the app showed 44%. Another sensor that is used regularly is still at 61%, so I didn't expect one on a door that rarely opens to have dead batteries despite the app showing me that the batteries are good.These show up as connected to WiFi when they need to show that something opened or closed, and then almost immediately after that, the device disconnects. I don't know if the app uses battery data that it gets sent when something opens or closes and a signal needs to be sent, or whether the device wakes up on its own every now and then to report its battery status. If it's not the latter, it would explain why the app never knew that the batteries were dead and never told me that it hadn't gotten any data from the device. If the system can't determine that it lost contact with the device for an extended period, and there's no timestamp from when the battery was last checked, you can't rely on these. If the timestamp is supposed to be the one from when something last opened or closed, that's worthless because it effectively means no reporting at all for a door or window that is almost never opened.

We are very pleased with these sensors, after about a month of use. We moved from a two story home in a low crime, low population area to a one story house in a much more populated town. We got these sensors to monitor our front and back doors, as well as the windows in our kids’ rooms and living room, as our kids sleep on the opposite end of the house.When attempting to set up the first sensor, I ran into some trouble. My wife got it set up, but it would not detect changes in open/closed status. We moved on to the others (five in total) and they worked fine. My wife took another crack at the seemingly defective unit and got it working.The good:Setup up was easy. I had missed a step that my wife noticed. If done properly, the setup won’t be any trouble.The app is fairly straightforward. It also integrates with the Apple Watch, so notifications from doors opening will come through on my watch.The sensors are small and easy to install. The large transmitter is about 2.5” x 0.75”, while the magnet side is only about 1.5” x 1cm. They adhere using double sided tape provided. These will fit the vast majority of windows and go on easily and securely.They reliably detect when the connected windows or doors are opened. The chime is loud enough on my phone to wake me.The bad:The chime can be a bit overzealous. If you open a door and close it without clearing the initial alert, you get multiple chimes overlapping each other in tandem. It sounds quite chaotic. If the latter chime simply replaced the former, it would be better.These are still new to us, so who knows if they will remain reliable. For now, we are very happy with them.

This device technically does everything it claims, but I found Wi-Fi coverage to be short and actually detecting an opening was not reliable and very delayed most of the time. As a result, I don't know that it actually solves a problem for anyone practically speaking.