First a disclaimer, I am not part of the Mixtile development team.
I managed to run the hub with openHAB 2.5.9. Mostly openHAB 2.5 is still compatible with Eclipse SmartHome 0.9, though I had to use some wrapper bundles to satisfy all packages and bundles required by the Mixtile hub. I had to make a small patch to openHAB to maintain ABI compatibility.
In general I followed the instructions for running openHAB 2.4, method 2: Manual stop-by-step. Additionally in step 12:
c. also copy
d. add compatibility plugins to the
./addonsfolder (org.eclipse.smarthome.core, org.eclipse.smarthome.core.thing, org.eclipse.smarthome.config.discovery, org.eclipse.smarthome.automation)
e. copy the patched
org.openhab.core.io.rest-2.5.0.jarto the ./runtime/system/org/openhab/core/bundles/org.openhab.core.io.rest/2.5.0/ folder
Finally ensure that the ‘Rule Engine (Experimental)’ binding is installed.
Bundles and Source code are available here.