The “brain” of your DIY Home Security and Automation System is the control panel or controller. Today wireless systems are the most popular for both DIY as well as professional installers because of the significant time savings. Years ago we would always recommend wired systems because of their reliability but that has changed. The newer wireless panels have high-tech rolling encryption to ensure the transmissions are secure, zone supervision to make sure the transmitters are still operating, and of course many home automation and remote access options.
Here is a quick primer on both type of security panel types: