SmartHome.pi auf B Plus model - mknx/smarthome GitHub Wiki
No image compatible with B+ is available. Also, the ROT Extension is not compatible with B+
On a Raspi-B the image can be updated to be B+ compatible though:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install binutils curl
sudo rpi-update
After this, the SD-Card runs in a B+.
The content of /boot of the SD-Card must be replaced by the content of /boot of a SD-Card that was made for B+ (refer to your favourite RasPi Howto to create such a Card with Raspian.