The trick with the water sensor is really neat, might have to look more into that. I also wish that more companies would design some of these building block sma

The trick with the water sensor is really neat, might have to look more into that. I also wish that more companies would design some of these building block smart devices for us hobbyist. Don't tie it specifically to water, maybe have a pot to trim the sensitivity, et voila you now have a pretty handy all-round ADC thing. For my bed detection though I just have Tasker on our phones telling the system when they charge. If it's after a certain point of day and our phones are charging that's a good indicator that we've gone to bed. Doesn't require any extra hardware, making it super cheap. Although accuracy obviously won't be 100%.