Good luck with this, I am very interested in this device as well.
I used to be a network engineer so I understand this type of coding but I am now quadriparetic (use a wheelchair and have limited hand function) so I now rely on text to speech, which means I can’t read most code now. (Trust me, you do not want to do groovy with text to speech!)
Coding for the V1 hub and the V2 is the same, and the same device handlers work on both.
Anyway, since you’re a programmer, you might find the following thread helpful. In it a community member picks up a new 3 button Zigbee key fob and with the community’s help builds a new device handler for it. Although it’s a different device class and so uses different clusters than the Osram switch, it’s the best example I know of for how the process works with SmartThings and Zigbee devices:
Also, here’s the FAQ on the various logs available:
And the FAQ on publishing custom code so you can use it, although you may not need this one once you’ve been through the other two:
