My Arduino has a DB table for the commands at specific time to do on or off, http://ecoxsaver.com/index.php?page=Functional-Block-Diagram . It also has a Real Time Clock with its own battery to keep track of the time of day, http://ecoxsaver.com/index.php?page=how-x10-controller-works. The Arduino connects via phone cable to TW523 as a power line interface.
Do you have CM17a that will turn x10 devices on and off on its own? It stores the x10 commands that are executed at a particular time daily/weekly without another controller? If so, tell me how... Do you know what CP290 is?
And I quote." FireCracker Software>
Using the software, you send commands to the computer interface that you've plugged into the back of your computer (see above). The interface sends commands to the transceiver module, which translates the wireless signal into an X10 signal."
Never does it say it stores any commands.
Just what I want my PC on all the time...to do timed commands, umm.