The Zemismart MJ82 is a simple Matter-over-Wi-Fi curtain motor that does exactly what it needs to: open and close a compatible curtain track reliably and quietly, without forcing you into another app, another hub, or yet another Thread troubleshooting spiral. It is not a drop-in retrofit like a SwitchBot Curtain, and installation takes more effort because you are replacing the track itself rather than clipping something onto an existing pole. But once it is fitted, it feels like part of the house, and in my experience it's been solidly reliable.
If you want smart curtains without touching a drill, look elsewhere. If you are happy to rip out an old curtain pole and install a proper powered track, the MJ82 is a reliable, Matter-native option.
What is the Zemismart MJ82?
There are already plenty of smart curtain retrofit devices on the market, including brilliant little curtain-pulling robots from brands like SwitchBot. Those are designed to clip onto existing poles, rails, and curtain systems with minimal fuss. They are great when you want smart curtains without redecorating or drilling, however they don't work in all setups, there's a variety of models for tracks or poles — and even then depending on the type of curtains you have you may need to make modifications to smooth out extendable poles or add clips to help your curtains glide.
At some point it becomes too much of a faff, so ripping it out and just putting in a new system track is a much cleaner and easier option.
The MJ82 is not a complete curtain system by itself; it's just the motor. Zemismart says it is compatible with standard 82-type curtain track systems, and I tested it with the company’s own extendable curtain track hardware. The specific MJ82 model reviewed here is Matter-over-Wi-Fi, not Matter-over-Thread. 82-type doesn't mean 82 types of curtain track, rather it appears to be a specific standard relating to the type of motor connection. This isn't a generic motor for any curtain track, so do check compatibility first if you're adding to an existing track.
Zemismart also rates it at 1.2 Newton meters of torque with a maximum load capacity of 50kg (110 lbs), which is more than enough for most normal domestic curtains. While it ships with a remote, the MJ82 also supports pull-to-close, which is great for when you have guest over who either don't have access to your smart controls or don't understand automation. However, unlike some of Zemismart's other curtain motors, there is no backup battery. If the power is off, you'll need to manually pull the curtains the whole way to close them (the horror!)
Matter over Wi-Fi, not Thread
I know some smart home purists will instinctively twitch at Wi-Fi. We've all been told Thread is the elegant future: a low-power, self-healing mesh, purpose-built for smart home devices.
In practice, my Thread network worked beautifully for about a week. These days, it barely lasts a day before something needs a border router reboot, which means I need a Matter-over-Wi-Fi power socket on my Thread Border Router in order to automate restarting it every day. That’s just silly, so I'm done with Thread for now, at least until some protocol changes are rolled out that make credential sharing easier.
That is why the Zemismart MJ82 being Matter-over-Wi-Fi is a selling point for me, not a compromise. Wi-Fi is boring. Boring is good. Boring opens my the curtains every morning without turning into a philosophical debate about the benefits of mesh topology. During testing, the MJ82 only once dropped from my network — and that was because I accidentally pulled the plug out. Basic reliability shouldn’t be such a rare a selling point in smart home gear, but here we are.
Installation and Setup
This is not a five-minute retrofit product (although even retrofit can be a lot more than you bargained when it comes to install). You're fitting a proper curtain track system, so expect measuring, drilling, and maybe even to do some mains wiring. Ours came bare wire — about 30cm. If you are lucky to have your home with power sockets up there in the ceiling then get the right plug option, and you should be fine; but it's not a low voltage system, and requires a full 110-220V AC.
The important really thing to know is that this is a ceiling-mounted system, with no realistic way to wall-mount it. Even if you could physically screw the brackets into a wall, the motor would end up projecting horizontally, putting unnecessary strain on the motor joint. It's designed to hang vertically from the end of the track.
That means you need to check your ceiling height and curtain drop before buying. If your ceilings are really high, you will need long curtains. For awkward old houses, converted loft spaces, anything built by someone who hates right angles, you may have to look around at other tracks, but basic installations on normal-sized ceilings are fine.
The motor itself is refreshingly simple to attach. It slots into place and latches securely with a white locking pin that you push into place. If you need to remove it, you pull out the pin and push it away (be careful, the motor will fall).
Adjusting the track
The extendable Zemismart track we were sent was also much easier to adjust than I expected. You loosen a single screw, pull the track out to the required length, then tighten it again. You don't need to dissect anything to adjust the drive belt separately, but you will need to reposition one of the curtain carriers after extending the track. That means again loosening a few screws, sliding it to the correct end position, and tightening it back up. It is not difficult at all.
The track itself is lightweight, mostly aluminum, and comes with a selection of mounting plates — the four labeled S are for the shorter, extended part of the track (if you've extended it). L is for the longer part. In either case, they twist to lock, so if you need to reposition because your measurements were off slightly, it's easy to shift them.
Matter support
This was the best part: I didn't need a Zemismart app, or Tuya. I didn't need to create yet another account, hand over my email address, or accept a privacy policy. Unlike some Matter devices, where the native app is still needed for most of the useful features, the Zemismart MJ82 is simple enough that Matter covers everything that you need. It opens. It closes. It reports position as a percentage value of opened or closed. That’s pretty much the whole job.
I added it directly to Apple Home, and it appeared as a curtain/blind device with the expected open and close controls. It should also work with any Matter platform though. Calibration was slightly off at first, but it sorted itself out after fully opening and fully closing it again. Once installed and paired, there is not much to say, which is exactly what you want from smart curtains.
The motor is not silent, but no curtain motor is. It's a mechanical system, but it is quiet enough that it’s not annoying in daily use, though I probably advise scheduling it to open at 5am next to someone trying to sleep.
The real selling point for me is reliability. In my testing, the Zemismart MJ82 stayed connected and responsive.
Should you buy it?
If you want proper smart curtains, you are happy installing a compatible curtain track, and you prefer Matter-over-Wi-Fi to Thread, definitely — the Zemismart is great, reliable, cost-effective option. The MJ82 motor is around $60, and should be available soon with a compatible track bundle for around $150.
Do not buy it if you want a simple retrofit device, if you are renting, if you cannot run power to the track area, or if ceiling mounting is not practical in your room.
For me, the Zemismart MJ82 makes a lot of sense. It is not flashy. It joins Matter, opens the curtains, closes the curtains, and stays connected. That is the dream, really: smart home gear that shuts up and does the job. Thread may be the future, but right now, my curtains open more reliably over Wi-Fi and I will take the boring win of existing understood protocols and mains powered hardware rather than Thread and battery powered meshing any day.
