cable tv addressable box

[sayzer]

Sure it is possible.

For example:

Assuming you have a very clear RF channel.
Say you have 100 units. Make them slave.
These slave units (devices) will be on listening mode on the channel.

Each unit will have a PIC , say 16F628A. Each PIC will have an ID number. Say ID = 1 to 100.
You will also have a master PIC and your master PIC will be the controller and sending the signal to the RF channel with two bytes.

First byte is the ID number.
Second byte is the mode ; either ON mode or OFF mode. Say Mode = 1 is ON, and Mode = 0 is the OFF mode.

When your controller sends the signal as
[ID,Mode]
then all of your PICs will check if the ID is their assigned ID.
When one of the slave PICs matches the ID then this slave PIC will take a look at the MODE.

IF the Mode is 1 then PIC will turn ON something.
IF the Mode is 0 then PIC will turn OFF something.


Is it clear enough so far?
All is free.