Hi,
I have a small network with M3 Hub, 6 temp sensors and one door sensor.
When I disconnect the power to the hub and reconnect all the sensor are offline and dont send data anymore. I waited 24h but the system didnt recover. Tried restarting the hub
I manually used the button on the sensors to fix it. But this only works when i am home.
For me this problem stops me from buying more aqara products.
Hello, welcome to the forum. I think your problem is related to your home Wi-Fi network. For some reason your router doesn’t see the gateway after powering down.
Question, do you see the gateway in the app after powering down?
How is the gateway connected to the router?
Have you enabled LAN Control in Profile > Settings?
Do you have full internet connection after the blackout? Because the wifi may be working, but your ISP may not have recovered. And sometimes you may not notice that your wifi doesn’t have the internet connection because mobile phones automatically switch to mobile data when there’s a problem with the internet through WiFi.
As an experiment, you may try connecting the M3 using ethernet and check if it helped. You can probably power the M3 via USB of the router. I use this setup personally and have no problems, even when I sometimes cut power to the router (and M3)
I dont think my wifi is the problem because the M3 is shown as online as soon as the power is back. I can also restart it and other stuff.
However when i click on the sensor button they are suddenly back.
My "blackout " was just disconnecting the power from the M3 for one night.
The wifi was fine.
And as soon as the m3 gets power, its back in the app. Just the sensors never come back.
I activated lan control and it brought the sensors back after another test.
But i dont understand what it does exactly and if this fix works when i am not home.
Without LAN control, the state of devices is always synchronized with the cloud and the app queries the cloud (not the hub) for sensor status.
The sensors don’t report their status continuously, they report their status periodically (or when some event happens). I’m not sure, but my guess is:
Without LAN control, the sensors probably couldn’t report the state to the cloud and they went into “sleeping” mode to save battery. Because, you know, if your smart home control is cloud based, the sensor cannot do anything without the cloud.
But LAN control makes M3 aggregate the sensor state, which basically prevents this behavior (because the sensor has a hub to report to). So the M3 can wake the device because it controls the automations.
If you are writing about this button, then this is manual control of physical devices without the Internet. This works within the home network. Perhaps your problem was related to this.
@cezary806 , you described the work process correctly.
Yeah i understand that the sensors enter a power save mode and i dont expect them to be back life in seconds. But i waiting for 30h and there was nothing.
Will do some more testing soon
This switch should be in this position. Off.
But isn’t the whole point of M3 to turn it on, as the whole point of M3 is that it can run local automations?
Local automations run continuously, regardless of selection. The information in the app will be different.
Sensor information is not updated.
Right, sorry for my confusion. But I as far as I understand it enables local sensor updates - so the sensors don’t need the cloud to be active. So in case of internet disconnection - they can still communicate via LAN (without the internet) with the M3 hub, even without the cloud.
And as far as I know, thanks to this option, you are able to control the devices locally, via wifi, even if your wifi doesn’t have the internet. And this option doesn’t affect the cloud features - I have this turned on all the time and I’m still able to use the cloud features (for example I can control the lights when I’m not home)
But maybe I’m misunderstanding something and LAN mode is actually not changing so much
Not sure this is relevant, but just-in-case. I had a similar problem, but I think it ended up being the power supply that I was using.
The M3 hub requires a 2 Amp/5 Volt USB power supply (not included of course), but it seems to somewhat function without complaining on a more typical 1 Amp/5 volt USB power brick. When I installed my M3, I grabbed a USB power brick off my shelf and didn’t read the (extremely small print) on the bottom of the power brick.
My M3 Hub would connect to WiFi, connect to my 3 water sensors, and be reachable by the Aqara app, and even Home Assistant. But it was (very) often complaining about disconnects, and would go offline for long periods of time - mostly while I was away from the house. I reset it a few times and it would work for a while.
I was very frustrated and about to throw them all away, but instead tried a bunch of troubleshooting. My frustration was that the Aqara app and the troubleshooting pointed at Wifi coverage or interference issues, but other devices in the same location were not having difficulties.
After replacing the USB power supply with a quality > 2 Amp version, I am happy to say that the Hub and the leak sensors have not even “blipped” once.
