Cheap Modules Upgrade Home Security System

[gw0udm] had an ancient monitored alarm system fitted to their home, and decided it was time to upgrade to something a little more modern. They chose a system from Texecom, but when it came time to hook it up to their computer, they were alarmed at the costs – £40 for what amounted to a USB-to-Serial cable! There were other overpriced modules too. But [gw0udm] wanted to upgrade, so it was time to hack the system.

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