Wireless Communication between four switches

Scenario:
A four-storey building had one room for each floor. It totaled up to four rooms in an entire building.

Objective:
The objective is to put an "indicator box" per room that displays if there is a person inside the room or not. It also displays the status of the other room via wireless communication.

The status can be changed manually via a switch or a toggle button:
ON - There is a someone inside the room
OFF - No one is inside the room

Things to consider:
Range/Penetration(like from first to fourth floor made of concrete)
Synchronization/Communication between the four box

Question:
What approach should i go on this project. Should i go 2.4GHz? Low freq such as 433mHz?

Sample of visual representation.png

Yuessie:
Scenario:
A four-storey building had one room for each floor. It totaled up to four rooms in an entire building.

Objective:
The objective is to put an "indicator box" per room that displays if there is a person inside the room or not. It also displays the status of the other room via wireless communication.

The status can be changed manually via a switch or a toggle button:
ON - There is a someone inside the room
OFF - No one is inside the room

Things to consider:
Range/Penetration(like from first to fourth floor made of concrete)
Synchronization/Communication between the four box

Question:
What approach should i go on this project. Should i go WiFi? RF?

Insufficient information and besides, WIFI is RF!!!!!!!

What is the actual construction? Concrete floors may be poured on top of solid steel, or may be some other construction. Does the building and floors have commercial power? The power wiring can be used to conduct RF. Does the building have fire sprinklers? I ask that because the floors will have space around the piping that will allow wiring.

Who will police the switches being set?

Paul

So sorry. I should've phrased it running between on a 2.4GHz or a low freq such as 433mHz.

Yes, it is "concrete floors poured on top of solid steel".

Yes, it had a commercial power and fire sprinkling system.

The one who manages the switch is from where the switch is.
Ex. Person living in A can only manage switch A, Person living in B can only manage switch B, etc etc.

I was thinking of a 433mHz module as it had a good range/penetration than a 2.4GHz. But i don't know how to start as i browsed. I only saw a 433mHz working between two arduinos, but not on this scale so far.

Hi,
Thanks for the diag.
Sample of visual representation.png
Tom... :slight_smile:

Another school project I’m thinking .. so you need to research the coms methods , then make a selection with reasoning ? Or ask here ?

Yes, it is "concrete floors poured on top of solid steel".

Then the floors are impenetrable to radio.
My suggestion on first reading was Wi-Fi, is this practical? Is Wi-Fi available on each floor?