1 router with low quality wifi connection impacts overall performance?

Installing and Using OpenWrt
1

I have following setup: A wifi router connected to ethernet and 2 other wifi routers in the house. These 3 routers are connected with a mesh/802.11s (from package wpad-mesh-openssl) over 5Ghz and they expose a 5/2.5Ghz wifi access in the house; resulting in strong wifi network in house; everywhere 5Ghz wifi is strong, giving minimal 300Mb/s between wifi devices and ethernet connected devices (and Internet access is around 100Mb/s). 2.5Ghz is strong enough in the garden.

Following issue: I need a 5Ghz* wifi in the basement for measuring power consumption of a heat pump. And in the basement the 5Ghz is not getting in... 2.5Ghz is 'medium' quality (around -70dB).

My plan is to extend the mesh to also bridge over 2.5Ghz.

The question: will extending the mesh network over 2.5GHz to a node that has lower quality wifi access to the mesh, reduce overall performance?
Or is Ethernet/Layer 2/802.11c smart enough to handle a combination of 'faster' and 'slower' nodes without reducing overall impact.

2

Do you plan to put other WiFi clients in the basement? That 2.4 GHz WiFi should be more than enough for the heat pump's power meter, and those kinds of low-bandwidth WiFi-enabled devices usually don't even support 5 GHz to begin with. If the power meter will be the only WiFi client in your basement, you might not need to extend the mesh.

3

It just became a bit ridiculous.
Indeed I was completely surprised that the device was on 5Ghz... (as such measuring devices are often where wifi is less powerfull). I believed this for a few months. Now I checked again and read it is on 2.4Ghz.
Topic closed...

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