I just released an integration between openHAB and the Nuimo. The concept here is to use Nuimo as a UI / control device for openHAB (similar to what the Nuimo Android/iOS apps are offering for very few systems like Hue or Sonos). My app is meant for installation on a Linux system, e.g. the Raspberry Pi - preferebly, but not necessarily, on the same system where OpenHab is installed.
If you want to have look on it, you can find the documentation how to install and use it here: GitHub - pfink/nuimo-openhab-python: Use your Nuimo as a UI for openHAB!
Unfortunately, Senic ended support and production of the Nuimo. Anyhow, there are some white Nuimo’s left and they have a special offer for users that plan to use the openHAB integration: You can buy them for 100,-€ (which is 50% of the original price) by just writing an e-mail to them at firstname.lastname@example.org. Just write in your subject “Nuimo openHAB Sale” and the number of Nuimo’s you’d like to order. Beware that there will be no official support for the software side by Senic anymore, they only provide support for proper functioning of the hardware.
Before you buy a Nuimo, you should know that it’s range is quite short (The “safe zone” for a very stable connection has a range of 2,5 - 3m in my setup). Also, the battery has to be charged via microUSB every few weeks depending on usage. Last but not least, the connection quality with the built-in adapters of the Pi is extremely bad for all Pi’s until 3B. With 4B, nobody has tested it yet. If you use the Pi, I recommend using an USB Bluetooth Adapter that supports BLE.