There were some big changes in Arduino IDE 1.5.x and later, which made parts of the Xronos Clock code incompatible. Fortunately it wasn’t to difficult to port firmware to new IDE and I’m happy to announce that version that works with latest Arduino IDE (currently 1.6.5) is here.

There are few important things you need to be aware if you plan to use source code. Some old libraries (Time) as well as Mightly1284p hardware definitions became incompatible with IDE 1.6.x so you’ll need to update those as well.

Mightly 1284p platform can be