Electronic access control (EAC) systems restrict users’ access of buildings or zones. The system only grants access to users with valid and authorized credentials. The main idea is to keep unauthorized persons outside of the boundary. However, intruders always find their way to sneak into the restricted area. Thus, various detectors are developed to work with EAC systems, to keep an eye on the restricted area. These detectors are normally standalone sensors. They are always hidden or beyond the reach of intruders to avoid any exploitation.