It is. Please note that we haven’t updated the pre-configured SD card image to support RPi 2 yet. So for the moment if you use RPi 2, you will need to install software yourself. For Dan’s Python interval program, instructions are at:
http://rayshobby.net/mediawiki/index.php/Python_Interval_Program_for_OSPi
For the Unified OpenSprinkler Firmware, instructions are at:
https://opensprinkler.com/forums/topic/announcing-opensprinkler-unified-firmware-2-1-3-for-avrrpibbblinux/