The Wi-Fi sleep monitor uses imported PVDF sensors based on the BCG monitoring principle. It monitors vibration signals caused by body movements, chest expansion and contraction, and heart pumping. The sensors convert these signals into electrical signals, which are then processed through amplification, filtering, and algorithmic analysis to detect heart rate, breathing, body movement, snoring, and other data. These data are then uploaded to the user’s phone and server via Wi-Fi. Furthermore, a flexible piezoresistive sensor with proprietary intellectual property rights is used to detect whether a person is in bed, significantly improving the stability of sleep status assessment.