In a normal house setup the wi-fi router acts as the access point and the antenna on the laptop or desktop picks up the access point.
If I sit at the laptop or PC (far from the wi-fi router) I can use an app on the phone to pick up the signal strength of that wi-fi router access point.
But how do I pick up the signal the other way around?
If I sit at the router (far from the laptop or desktop) when I open the app to tell me signal strength, it only tells me the signal strength of the wi-fi access point.
It doesn't tell me the signal strength arriving at the router which came out of the antenna on the laptop or desktop (far away).
How do I measure THAT signal strength?