The aging population has become a pressing social issue, as the younger generation is busy with work and financial stability, leaving little time to care for the elderly. Technological advances in smart homes provide an opportunity for the elderly to live more comfortably and conveniently in their own homes. In this study, we conducted research on the definition of a smart home, the existing usage of the pressure sensor, the classification of the pressure sensor, and its working theory. We are curious about if a consumer-grade barometric sensor is sensitive enough in the home environment. Then, we set up the testing equipment with a consumer-grade barometric pressure sensor, an Adalogger FeatherWing, and an Arduino board. After programming the Arduino, we collected the data from the BME680 sensor in different states (open or closed) of the door, and then analyzed and visualized it using MATLAB. Furthermore, we also explored some potential scenarios and applications for the BME680 sensor. With the help of the BME680 sensor, smart home technology has the potential to improve the lives of older adults and ease the burden on younger generations.