Building the most sophisticated raspberry pi home security system step 1 install the software first install the necessary software on your raspberry pi step 2 set up the modem insert your sim card into your lte modem by following these instructions for the trm240 make step 3 connect . Perfectly as the controller of a sophisticated home security system using the available on board interfaces the raspberry pi can be expanded to allow the connection of a virtually infinite number of security sensors and devices the raspberry pi has the processing power and interfaces available to build a sophisticated home security system . The raspberry pi has the processing power and interfaces available to build a sophisticated home security system but at a fraction of the cost of commercially available systems building a home security system with raspberry pi starts off by showing you the raspberry pi and how to set up the linux based operating system. Step 2 setup your raspberry pi your pi needs to boot a linux operating system in order to run motion the most popular choice is raspbian a debian based os that is optimized for pis hardware