I spent a lot of effort over several months

• I spent a lot of effort over several months
• I realized getting the last 5-10% right might take 90% of the effort
• Inaccurate data would make the whole effort mostly pointless
• A sleep monitor without SPO2 monitoring isn’t that useful
• And building or interfacing with SPO2 at the time, was too hard
• So I gave up that project

This is where I gave up