Some people at CERN made a smartwatch for a colleague's retirement a number of years ago. Their entire project is FOSS, complete with a talk at FOSDEM 2015. It'

Some people at CERN made a smartwatch for a colleague's retirement a number of years ago. Their entire project is FOSS, complete with a talk at FOSDEM 2015. It's not quite a tutorial or walk through, might be interesting for you. https://www.ohwr.org/project/f-watch/wikis/Home https://www.ohwr.org/project/f-watch/wikis/Home