Control of lighting and thermostats in the home - TUYA, MOES TS0601, Gateway ZigBee Z2

Hello to all forumers,

I've recently been thinking about buying some home automation components for my flat. I'm primarily concerned with lighting control and thermostats. Additionally, I have an automatic hoover and a xiaomi fan. In the future, I want to buy an air purifier and a humidifier. I would like all devices to be easy to operate, preferably with one application (2 users).

Moving on to the core of the problem. I have found TUYA thermostatic heads - 3 heads: MOES (TS0601) on zigbee 3.0
and gateway: Gateway ZigBee Z2 Tuya Smart Life

Regarding the lighting (I am green so if anything is not clear I will try to describe more precisely) I would like to control the following lamps:
- in the living room (connected to one double switch) the main lamp and additional led lighting
- in the kitchen (also double switch) - lighting in the kitchen and lighting above the table

I am keen to be able to dim the leds, which are far too bright, so I found such a module: QS-Zigbee-D02-TRIAC-2C-LN
and for the kitchen one without a dimmer: QS-Zigbee-S04-2C-LN

Now the questions:
- will I be able to connect everything under one gateway and easily control e.g. google assistant and google home?
- do i understand correctly that i need modules marked "2-gang" to connect to the double switch?
- Will everything work through the gateway over zigbee? I would not like to overload the wifi.
- Should I include anything else in the planned changes? Is there anything I should be aware of?

I would also add that this is a new build so from what I have read there should normally be "N" in the sockets.

Thank you all in advance for your help!
Kamil

PS. Unfortunately I am a new user and am not able to insert direct links so I have only included the model names.

Xiaomi requires a different gateway than Tuya. In addition, there may be problems with the regions.
With the Tuya gateway you should be able to handle the other devices listed.
Theoretically you can connect this with Google Home - but with Xiaomi this may depend on specific models and regions. Connect via the cloud, so you need internet access - you will put a strain on WiFi, but marginally compared to devices on WiFi.
Dimmer is a triac dimmer - what power supply do you have for the LEDs?

kamilserek wrote:

to connect to a dual switch do I need modules marked "2-gang"?

- you need a dual channel. Possibly 2 single channel ones, but they take up a lot of space.

kamilserek wrote:

Is there anything I should be aware of?

- you should be sure of the installation and N wire - this is essential. Another consideration is the depth of the boxes - the sub modules need sufficient space. Plan your Zigbee network accordingly in terms of coverage. Tuya has WiFi and LAN gateways - pay attention to this when planning your gateway location. Permanently connected devices inherently extend range - e.g. switches with N.

In my opinion, the most future-proof solution is to use a system where you can integrate products from different manufacturers, especially since you want to use Tuya devices on Zigbee and Xiaomi devices in one application. I use Home Assistant for home automation, with a Zigbee CC2531 open gateway for this. With this gateway (cost 40PLN), I connect to the TS0601 head unit without any problems and with the corresponding integration with Xiaomi devices.

Home Assistant has many advantages, but it also has its disadvantages - e.g. remote access - paid cloud or e.g. duckdns. And it can also give unpleasant surprises - e.g. with some updates.
Like cc2531 not for 40 zł - better to buy with antenna. Or Conbee II.
Through the cloud, many devices can be integrated via Google Home, Alexa, HomeKit, etc.
It all depends on your requirements and preferences.

You can also buy a sonoff ZigBee bridge AND load a special version of Tasmot. I, on the other hand, avoid all cloud solutions. I have a fixed public IP and my own VPN server. The only clouds with me are Google Home and Nora. These, unfortunately, cannot be bypassed to enjoy voice control. True, there is an offline alternative for speech recognition, but it is difficult to implement and more unreliable.

Exactly, a paid cloud e.g. NabuCasa in Home Assistant is an additional possible option. You can set up your own server e.g. openVPN and the matter is settled. At the moment, most ISPs already offer an external IP address free of charge.

@kamilserek what solutions did you opt for?