So just for the heck of it... and because this thread peaked my interest... I did an experiment last night.
I have a simple Sensor, that talks to a Receiver using RF (with very little range) then the Receiver connects to my Network using only a wired connection. I bought this to remotely keep track of the temperature in my Spa.
The Spa is in the backyard, away from the house, and quite a distance from any Network connections.
My plan was to run
Cat5e out to my secondary garage and place the receiver near the window, much closer to the RF Sensor, but other responsibilities have taken priority, and I never got around to it.
But due to this discussion, and all of us wondering about having Powerline Adapters on separate circuits, I thought I'd give it a try.
First I placed the adapter in my house near the window closest to the Spa... no luck... the Network linked up fine, but there was too much distance between the Sensor and Receiver.
Then I took the adapter out to the secondary garage and plugged it in to the first plug I could find (closest to the house - knowing I am on a separate sub-panel). I did not expect it to work, but I got a green light on the adapter and the Receiver linked up to the Router with no problems. I was surprised. But still the RF was the weak link, and there was no communication between the devices.
Then I took the whole apparatus across the garage and plugged it in to the outlet nearest the Spa and placed the Receiver in the window (now they are only about 30 feet from each other).
Bingo. Even though the Powerline Adapters (the one in this garage, and the one plugged into my Router upstairs) are two buildings and one sub-panel apart... it worked.
The moral to this story is... Try it.
Buy a decent quality Powerline Adapter (as pozzello suggests - somewhere you can return them if it doesn't work) and give it a try. You might be surprised.
Of course I understand that this combination of RF Sensor and Receiver are only sending a few packets every 5-10 minutes, and not streaming camera data 24/7, but from the Powerline Adapter I'm getting a green light from a building away, and I sometimes get yellow performance in the same structure.
Just wanted to share my $.02 again.
