* Self-hosted security system that e-mails me when triggered. It arms when everyone disconnects from the wifi and disarms when anyone in the home reconnects to wifi. Totally passive. Also arms at night when the kitchen lights have been out for 5 minutes after a certain time and disarms when motion patterns that can only be someone waking up are sensed.
* E-mails work and personal when smoke alarm goes off or when water is detected in basement
* E-mails pic from front door camera when doorbell pressed (yeah, like Ring, but with a ESP8266 monitoring my normal doorbell)
* Voice reminder on garbage day
* Northern loon call exactly at each sunset
* Ambient jungle noises and lights on when I wake up and it sees me
* Laundry timer + reminders
* Vacation mode random lights on/off
* Plays a Ship's bell chime on the hour, but only during daytime (ambiance)
* Tones when any outside door in the house opens. Optionally: random Seinfeld bass transitions
* Alert for power outage
* Alert if my mom's house temperature goes too low in winter when she's away (I've called the plumber to fix the furnace thanks to this)
* Turn on A/C if temperature above threshold at 4:00pm in anticipation of my return from work
Stuff like that. Loads of fun. Lots of fiddling.