Temperature range is: -20 - -60 Deg.C (+/- 3 Deg.C) Also mainly used to control the temperature remotely. Works with Aqara Hub.

This sensor works with the independent Zigbee protocol, you also need a compatible Zigbee hub to display the data on your smartphone in an app, whether Apple or Android. The sensor itself does not display any colours for the air quality.

Technically there is no difference, it is just a different country version.

Yes, it should work (specs officially up to minus 20). Another alternative would be a socket switch that can measure consumption. And if it goes to 0 then you get a trigger

That's exactly what I do with the Aqara. However, you still need a controller that reads the sensor data and switches the smart plug. I use Home Assistant, but it also works with Apple HomeKit or IFTTT or other home automation software.

In my opinion, it's going to be very complicated. The sensor is powered by a small 1.5V battery. The radio signal strength will be quite low. Impossible to go through several concrete walls.

Yes, this is possible with the automation functions, you just have to make sure that the sensor and the WLAN socket can see each other in the same home automation system where you want to set up the automation. For these sensors, however, you absolutely need a bridge, because the sensors are managed by the bridge and not via WLAN.

No, you can only use the devices without a display together with an Aqara Hub. However, there are also models from Xiaomi that have a display for temperature and humidity. Xiaomi Mi Temperature and Humidity Monitor 2 Xiaomi Mi Temperature and Humidity Monitor Pro

Yes, of course you can do that. You need a control centre (homey/homee/apple home etc.) that controls "if then" rules with different Zigbee/zwave/wifi products. You probably already have one. Then you would need a control device/controller on the heat product, right. What I don't understand from your question is for what kind of heat product. Underfloor heating or radiator. Radiator is the Danfoss Ally rin example. Can you specify this more precisely?

No, this is not possible. The Aqara sensor sends the data via ZigBee and these must be received and processed by a corresponding device. The hub is responsible for this. The hub can then be integrated into the Apple Home app if it is HomeKit-capable. The app can then display the data. I don't know if the hub can do historical tracking.

No, but I would cut Tesa Powerstrips - they come off any surface without leaving a trace.

Hi, This device is communicating via Zigbee radio protocol and it requires a hub/gateway. Look into Zigbee to learn more how these kind of devices work. Cheers!

Up to minus 25 goes

As long as the hub is available - it works perfectly with Google Assistant.

Hello You also need a hub. With Aquara, other devices can also be a hub. E.g. a camera... https://www.galaxus.ch/de/search?q=aqara+hub&is=Aquara+hub

Probably no. My Aqara Hub is not even compatible with Philips HUE. Aqara has its own Zigbee network and is only compatible with Aqara certified products. If you are lucky, you can connect the different systems with Apple HomeKit and possibly control them together in an automated way. This is exactly what will happen with the Danfoss Ally Gateway. And for Zigbee in a house, you definitely need Zigbee active repeaters because of the walls and distances.

This thing is only a room climate sensor that transmits the measured values to a Zigbee Hub or Bridge via the Zigbee protocol. It has no direct connection to services such as Google Home. Whether Google Home can evaluate the data depends on whether the Zigbee Bridge you are using has a Google Home integration, and whether this integration also transmits sensor values. The sensor works with the Zigbee Hub from Xiaomi, the ConBee II USB stick from Dresden Elektronik, and probably also with the Philips Hue Bridge and some others. Whether Google Home can perform automations based on sensor values, I don't know. But that's a question independent of this product, and you're more likely to find the answer at Google Support or something. Google Home has a feature called "Routines", but that doesn't seem to be good enough for your use case. I use the sensor together with the ConBee II USB stick and a Raspberry Pi with Home Assistant installed. With Home Assistant you can manage various devices and sensors from all possible manufacturers and all possible technologies on a single platform and set up automations without a cloud. Of course, you can also switch on a device when a certain temperature value is reached. So the question is not so easy to answer and depends on which Zigbee Bridge you use, how well it integrates with Google, and whether Google can do something with the sensor value. The sensor itself can only do Zigbee.

Yes

No, unfortunately that is not possible. Either a Xiaomi gateway or another home automation system with a Zigbee stick is required.

2. You have to try it out, I can just about manage three floors with the lift in the stairwell.

No, unfortunately not. A bridge is also required.

No, the sensors cannot be integrated into Hue. An Aquara Hub or other third-party receiver is required for this. I use a ConBee II USB stick for this purpose.

Hello, In principle possible! However, there are two parts: 1. reading out the sensors: I have connected the sensors with a ConBee 2 ( dresden elektronik ConBee II USB Stick ). 2. display: Would also use a Raspberry Pi. I would have a look at Hass.io. But it may be that the solution is a bit overkill :)

Yes, this is obviously also required. The sensors are connected to the hub and you can evaluate/retrieve the data from the hub (e.g. via smartphone). That is usually the "joke" about these devices, also about "smart" smoke alarms etc., so that they are "smart", you usually have to buy expensive hubs.

1) Yes 2) Yes, you need the Aqara Hub