Our home is an off-grid house on a small rural property (80 acres) in Queensland Australia. The focus is on energy efficiency and self sufficiency.
The system originally ran from a few Arduino megas running my own code including custom communication protocols (because I had not heard of MQTT.) These have now been updated to use MQTT and OpenHab.
How big is your system (Sensors,Switches ect)
About 70 sensors/input devices in all. These report on normal things like temperature and humidity, but also things like the depth of water in our bore (800m from the house) and the level of water in our tanks. The solar power system uses Morningstar controllers that support MODBUS and a victron battery monitor outputs data to a custom (esp8266 based) serial to MQTT relay. Most of the lights and power points have Sonoff devices behind them (running my own software).
16 cameras and a watering system that looks after about 55 fruit trees. OpenHab, Weewx and Mosqueeto on a Pi3.
How long have you been working on your setup
I started with the Arduinos about 4 years ago. Discovered OpenHab about 2 months ago.
How many lines of code run your rules (Total Lines of all files)
Whats the best feature your system has
Voice control from Apple Watch is cool. Ability to automatically turn electrical loads off and on as solar power permits. Turn generator on locally or remotely by voice if required. Ability to monitor the bore and automatically alter watering of fruit trees accordingly. Oh and the cat flap automatically tracks each of the two cats in and out - and prevents them from exiting after sunset.
What are you adding or doing next
Currently building an interface to get data out of our solar water heating system - this will provide data to help decide when to dump surplus solar electricity into the water heater element.
Does everyone in your house like your system
The word “tolerate” comes to mind
How much has it all cost
Almost everything has been built on low cost hardware (sonoff devices, arduino etc). I would guess around US$600
My job - well I started life as an electrician before moving into IT. I am currently semi-retired but still doing a little web development etc.