We kicked off our final chapter with a guide to the Raspberry Pi's GPIO connector and how to safely connect peripherals to it. We followed that up by connecting a laser sensor module to our Pi to create a rather cool laser trip wire that could alert you when the laser beam is broken.
Following along the same theme, we also connected a passive infrared motion detector to our Raspberry Pi, which observed an area of space and detected when our space had been infiltrated.
Because we may not always have an Internet connection to our smartphone when out in the field, we extended our methods of being remotely alerted to include SMS, using a few simple lines of script which connected to the API of an SMS gateway service.
Moving away from protecting our space to protecting our digital assets, we looked at a way for our Pi to know when we're in the vicinity, with a script that scanned for the Wi-Fi address of our personal phone, which if found, could then do something, such as unlocking our encrypted...
