How far away is Arduino "A" from computer/controller "B" from computer/controller "C"?
What is the RF interference environment? How likely is RF interference?
Principle should not be specific disorders, I believe that while there will be interference , range will be reduced ,so that's fine for me
How fast must it work? Can you overcome temporary interference by sending the command several times?
Fast isn't an issue, The packets that I'll need to send will be from 5KB to 100KB, but most of the time small traffic.
I don't need to transfer big files .
Is there a need for status read-back?
what is it? , sorry.
How does computer/controller "B" know that Arduino "A" got the message?
I think he right after B send the info to A, A will send an approval to B.
How does computer/controller "C" know what Arduino "A" or computer/controller "B" is doing?
All adapters can read the traffic, and analyze it and check if its for them by ID.
How important is this "electricity control"? Is this a Life/Safety issue? is it secret so you can't tell us?
It isn't that important, I need to do it for someone , he asked me if it is possible, so I told him that I used to make small robots with arduino.
Thats why I thought the Arduino will be able to handle this.
Are Arduino "A" and computer/controller "B" and computer/controller "C" utility mains powered or battery powered?
only the Arduino (A) will be powered by battery, This is my biggest worry.
most of the time it will be in idle mode-no traffic at all.
What exactly is the size requirement? We are going to get tired of the game if we keep suggesting things and you tell us "it is too big".
I did not mean to be secretive or missing information
Smaller as many good.
This should be a prototype,
So I prefer to be as close as possible to reality.
Many thanks again,
sorry for the ambiguity,