Ok, the topic of this thread is “What did you build today”… If it is ok, I want to share what I build the last 4 weeks.
First some background, I am building a new house next year, and I plan it to be “smart”. So I did some research and quickly found out that a “closed system” like Homematic is not flexible enough. So I researched for open brokers, tested some, and ended up with Openhab. Why? Cause my “test” was very simple: I gave myself three hours for each broker, and after two hours, I wanted to see how far I came. While for example the setup of home assistant took one hour alone, with OH2 after two hours I already build items, sitemap and simple rules. So I stuck with it.
Then, I was looking for a open standard for actors. My goal is to have a “classic” electrical installation that everyg guest can use, but with “smart” overlay. So for example, switch light on and off with a physical switch, but also being able to switch remote. I ended up with Z-Wave, devices and actors are cheap and broadly available.
So I started with a Raspberry, a Z-Wave USB Controller, a Fibaro Switch and some z-Wave sockets four weeks ago:
It did not take long to make things work, and even at this time I already tried to make a nice sitemap with infos. I even managed to add a “live view” from a old Foscam IP camera:
I realised that Openhab quickly makes addictive. So when December started, I bought a cheap Z-Wave socket to control christmas decoration outside (yes I know the socket is indoor use only, but it is protected from rain).
As I want to automate certain illumination later, I bought a Motion Sensor for testing:
As there is nothing to switch with it at the moment, I used Telegram binding to let it send alarms. Telegram also sends snapshot images when lighting change (just for fun 
)
Of course I want to have Alexa integration, so at Black Friday week I bought some Echo and Echo Dot. Thanks to Openhab Cloud, no hazzle to integrate.
After feeling more “secure” with OH2 now, I tried to do something more sophisticated, I decided to buy some Tuya bulbs and try to integrate them:
It was a hard nut for me to crack, but I did it with the help of the community, and the very good tuyapi-wrapper from AgentK. And I decided to write a tutorial about it.
In the meantime, I always improved my sitemap, for example with a nice weatherwidget:
I also set up Grafana to be able to make some graphical analysis later (so far only some Sysinfo items).
And of course a lot of other, “smaller” things like rules which send frost warning by email (I always forget to cover my windshield in winter to prevent icing), connecting OH2 to IFTTT, adding FritzBox to sitemap, create regular backups and so on.
Actually looking back to the beginning, I really am fascinated how easy to use and how “open” OH2 is.And considering that 4 weeks ago I did not even hear about Openhab, Z-Wave, MQTT, Grafana and InfluxDB, I am really happy how quick things developed. And I am already prepared to set up OH2 and Z-Wave in my future house.
All this I only achieved because of this excellent forum.
Thank you all for your help and inspiration!
P.S.: This thread already gave me the next task: Integrate and test Shelly-Switches as a cheaper alternative to Z-Wave components 