The neat thing about X10 and Insteon is that everything acts "normally" at the device level, but you can program everything (remotely?) via the Indigo server. Your parents wouldn't even have to know that their house was running schedules (except for lights turning on an off).

If you're referring to the water sensor, it's definitely not parent-friendly, but I sometimes have to bail water during power outages from thunderstorms. It has to work during a power outage and an old Chromebook was cheaper than a UPS.

I kind of ran out of time for messing around with the sensor, but I did think of either dumping the Winbond chip on my reader, or using a .bin file that was used for OTA updates and pushing a modified version down locally.

That likely would have been "cleaner" vs. a 23-hour reboot cycle. I likely would have wanted a dump first in case I borked the firmware. The Python monitoring script just uses standard HNAP to read status codes from the sensor in 30 second intervals - I think there's some way to push updates via HNAP as well.

Thanks for the reminder - may be a good project for winter, when there's no chance of needing the sump.