here is someone that did a test: https://hallard.me/nrf24l01-real-life-range-test/

@neech Sure.

Depending on your router you could even make a different VLAN with a different SSID and keep it seperated in this way. Only allow the most essential ports from one network to the other.

I'm using the NRF24L01 for my setup because I don't want my "security grid" to go offline if my router for example breaks down. Next to that it's safer in my eyes to keep the 2 networks separated. It's easier to hack a wifi network than your own custom build security network.