ok, so here is the result of the rangefinding with n12 placed in the lower floor kitchen. I'll accept that a successful ping means a working link. I reversed the figures to make it more meaningful.
green means good signal ie 0% packet loss, orange is weak and red is non-existent or 100% packet loss.
lower floor
upper floor
I don't understand why he's getting 100% packet loss in the living room and bedroom 3 on the upper floor. Expected at least 80% signal there.
One antenna at 0 degrees from vertical gives horizontal coverage, the other at 90 degrees from vertical should give vertical coverage. orientation is right.
Would it make any difference if instead of placing the router on the kitchen counter, he needs it up on the ceiling in the same location. Am beginning to wonder whether his original location next to the pooja room is any better ? should at least get a signal in the upper living room and kitchen.
However bedroom 1 & 2 on the upper floor are going to be difficult to reach with those load bearing walls in the way.
He's getting a good signal on the ground floor except for bedroom 2 but its the top floor where things get attenuated quickly beyond the kitchen.
where to place the AP ?