Xiaomi aqara sensor with Samsung home connect

[wasim (Wasim Ahmad)]

I bought Samsung home connect pro all motion sensors working fine except xiaomi window and door sensor they connect very well without any issue using device Handler in one hour after device goes unavailable and never connects back unless I have to remove and reconnect again any help really appreciate that.i have 15 off them all dos same thing.please help help help ----==

[veeceeoh (Keith G)]

I am sorry to say that the Samsung Home Connect may just not work with Xiaomi Zigbee devices, because it is different from the SmartThings v2 hub and also uses different firmware.

Please see my post here for more information and quotes from other Samsung Home Connect users who were unable to keep Xiaomi devices connected.

[wasim (Wasim Ahmad)]

Thank you very much. For a quick reply that’s what I was thinking but my question is if it works 1 hour without any problem is doing on off is detect motion and does all functions properly exactly after 1 hour it just goes offline I’m pretty much newbie with these things but I was thinking it maybe there is a small change will help us I hope someone can take a look appreciate in advance your help and reply

[veeceeoh (Keith G)]

@wasim

my question is if it works 1 hour without any problem is doing on off is detect motion and does all functions properly exactly after 1 hour it just goes offline I’m pretty much newbie with these things but I was thinking it maybe there is a small change will help us

Only SmartThings would be able to make a change that would help, and I don’t think it’s likely that will happen because the issue with Xiaomi devices dropping their connection is because they don’t behave as Zigbee devices are supposed to.

Here’s the explanation from a SmartThings Software Engineer:

@tpmanley

As you probably know, the Xiaomi sensors are very sleepy. Most sleepy end devices that we support will wake up every 6 seconds to 2 minutes to check for messages and to make sure its parent knows it is still there. The Xiaomi sensors do this closer to once an hour. That is zigbee compliant behavior so everything is fine so far.

The zigbee specification includes a section called End Device Aging. It states that a parent must forget about a child that doesn’t check in for a certain amount of time. In other words if the parent (like the hub or another router on the network) hasn’t heard from a device within a certain amount of time it must tell the device to leave and rejoin the network. This isn’t an uncommon thing to happens on a zigbee network and most devices will handle this just fine. When the device does it right you’ll never even notice it was gone for a brief period.

By using a zigbee sniffer I can see all the communication between the sensor and the hub. The sensor is quiet for about an hour and then sends a checkin message to the hub. The timeout for end devices has elapsed so the hub’s zigbee radio doesn’t recognize the sensor anymore. Therefore per the specification it sends the sensor a leave and rejoin request. The sensor replies with a message saying it is going to leave and rejoin. Then it does leave but it does not attempt to rejoin. Instead it appears to factory reset itself. This is why it drops offline and I believe is non-compliant behavior.

(a partial quote from this forum post)

So as you can hopefully see from the above explanation, even though the Xiaomi devices seem to work fine for the first hour, the hub is looking for a different kind of check-in message from the device, which Xiaomi devices send either every 50 or 60 minutes. Then, because the Xiaomi device doesn’t re-join as requested, the connection is dropped.

In the current firmware of the SmartThings v2 hub, it appears that Xiaomi devices are allowed to keep their connection when they check-in with the hub, while on other SmartThings hub products, such as the Home Connect or SmartThings Link for NVIDIA Shield, probably send the leave and rejoin request which results in the lost connection.

[wasim (Wasim Ahmad)]

Thank you very much for the quick reply and thanks for all the information which was really helpful I just call Samsung technician he was on phone more than 45 minutes he was trying to help me but he could not and he was trying to put everything on xiaomi device but I said to him this is not device problem this is the Hub issue because if device was working fine with SmartThings Hub 2 why is not working with newer model that’s mean there’s problem with Samsung home connect pro or with the firmware and he was agree with that and he told me engineer trying to fix this problem hopefully we will get back to you

[CSC]

It’s not Xiaomi fault or ST fault. You are using non compliance device and expect ST to support it.

It work then count your self lucky.

[wengrh]

Is there firmware update for samsung home connect to make xiaomi sensor work with it ?

[wasim (Wasim Ahmad)]

There is new firmware release just 2 days ago for Samsung home connect pro version 22.52 I’m going to confirm that all xiaomi device working with new firmware no connection drop I am testing since 2 days there’s no problems so far everything was fine all device without any issue no connection drop