Yes, it should be feasible. Heart Rate Variability has the biggest correlation with sleep stages among the features that are available from a smartwatch. Try h

Yes, it should be feasible. Heart Rate Variability has the biggest correlation with sleep stages among the features that are available from a smartwatch. Try https://github.com/ojwalch/sleep_classifiers https://github.com/ojwalch/sleep_classifiers and other work from Olivia Walch and her lab at UMichigan. You may find other papers on sleep staging referenced at the National Sleep Research Resource https://sleepdata.org/ https://sleepdata.org/ or at https://physionet.org/about/software/ https://physionet.org/about/software/