JohnnyCash said:Does the PC-Module send wireless signals to the receiver at the lights?
The firecracker sends wireless signals to a receiver that is plugged in to a wall socket. This receiver also recieves the signals from the remote controls. This then sends the signal over the electrical wiring to the different X10 modules in the house. There is also a module (CM11A/CM12A) that plugs in to the wall socket and into the serial port that that skips the wireless part.
JohnnyCash said:And are there modules for ceiling lights? Didn't find one. Just for socket connection.
Yes, there are. There are modules that replace the wall switches as well as modules you can build into your ceiling lights.