So you set the operating mode for each deco yes? To sum up I can have two decos working in Access Point mode by cable, and third one working without cable, just paired wirelessly?

@soek 

Operation Mode is for Deco mesh, not for individual nodes. If you set your Deco correctly, you should have single Deco mesh with three Deco units in it. Change Operation Mode in Deco app to Access Point mode and all your Deco units will run in that mode.

The question about wired and wireless Deco running together is answered in Q2 of document I gave you. Short answer: yes, they will run just fine, wired and wireless.

@Alexandre. Thank you so much!

Last question.

In option : Router - Main Deco - Switch - Deco 1, Deco 2 etc.

Can I set the parental control for each deco separately? 

@soek 

If you switch Deco Operation Mode to Access Point, you will lose Parental controls. More about it here: What’s the difference between Access Point mode and Router mode on the Deco?

There are good news: with the option "Router - Main Deco - Switch - Deco 1, Deco 2" you do not need to switch Deco to Access Point mode to have some Satellite Deco wired to switch and other wireless. Which means, if you stay with that option, you'll still have Parental controls.

Parental controls are set for all Deco units that are in Deco mesh. You can't set them on individual Deco units, that defeats the whole point. The point of WiFi mesh is to present mobile device with single SSID, unified services behind that SSID, and have multiple number of Deco units all behave in unison.

@Alexandre. Once again thank you!

This will be the last one I promise! :)

In this setup: Modem/Router - Main Deco - Switch - Deco 1, Deco 2 etc.

The Modem/Router gives WiFi as well or only Decos give WiFi?

EDIT :

I guess I founf the answer:

Q1: Can I set the Deco Wi-Fi name and password to be the same as my existing router?

When Deco works with an existing router, it is suggested to turn off the router's Wi-Fi network and use Deco's Wi-Fi network instead to minimize the wireless interference.