Systems and methods that address the gap, security, and robustness limitations of known door and window contact systems and methods without increasing the overall cost thereof are provided. Some systems can include an accelerometer and a magnetometer for mounting in or on a first portion of a window or door unit and a microcontroller unit in communication with each of the accelerometer and the magnetometer. The accelerometer can measure acceleration or vibration relative to a second portion of the window or door unit and transmit the measured acceleration or vibration to the microcontroller unit, the magnetometer can measure magnetic field relative to a sensor magnet mounted on or embedded in the second portion of the window or door unit and transmit the measured magnetic field to the microcontroller unit, and the microcontroller unit can use the measured acceleration or vibration and the measured magnetic field to make a security determination.