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Today I’m going to discuss a range of X10 compatible PC controllers that the budding smart home enthusiast could take advantage of. These devices allow for the control of appliances by set times or through the sending of immediate commands. Before choosing a controller it is necessary to weigh up the limitations of each, with special consideration given to the relaibility, as well as, how easy a custom application could communicate with…the device, should you wish to make one.

CM12U

The most widely used controller is the CM12U. It connects to the PC via serial link and when batteries are placed into the device it is capable of storing user defined settings, for example if the home owner wanted the lights to turn on at 6pm, this can easily be accomplished by the CM12U even when the computer is turned off. A major limitation surrounding the CM12U is the fact that it uses a serial port for communication, which most PC’s do not support these days.

When I tried out a CM12U I purchased a serial to USB (Universal Serial Bus) adapter with the hope that it could work on my USB only laptop but to no avail. I assumed that this was due to the fact the CM12U has been around for a long time without much advancement, therefore compatibility even with a supposed adapter has not truly been considered.

CM15A  Read more...