An Intelligent HSAT with EEG-Based Sleep Stage Monitoring

Sleep apnea is a sleep-related breathing disorder in which breathing repeatedly slows or stops during sleep. These events can disturb normal sleep and may be associated with drops in blood oxygen levels and other health risks. Although laboratory sleep studies provide detailed information, travelling to a sleep centre and spending a night there may not be convenient for everyone. This paper presents Smart Sleep, a portable home sleep-monitoring system designed to collect selected physiological signals during sleep. The system design brings together oxygen saturation (SpO₂), heart-rate, and electroencephalography (EEG) monitoring. An ESP32 microcontroller coordinates the planned data-acquisition workflow, local storage, and wireless transfer to a mobile interface. EEG is included to explore the possibility of adding sleep-stage information to home monitoring. This paper describes the system concept and its proposed development and evaluation. Since verified prototype measurements and clinical comparison data are not yet available, performance or diagnostic accuracy is not claimed. Further engineering and clinical validation are necessary before the system can be considered for diagnostic use.