Hi,
I want to control devices through openHAB from my own app. Where do I start? I am new to the platform and community but one of the openHAB users recommended me this platform, so I thought I will give it a try. 
Should I choose v2 or v1 or both?
Thanks!
Jacek
Go for v2 and interface through the REST API.
Hey @BinaryBanana
why do you want to develop your own app? Will it be a commercial product or aren’t you satisfied with the official app?
Why not fork the current app and then contribute your changes back?
Thanks OMR!
@mueller-ma, @Thedannymullen It’s just a completely different approach to the UI and the way you control your home. It’s free and no in app-purchases so far.
To speed up the integration, I could then take a look at the official app source code, right? So many things are new here that I don’t even know where to look
You can use code from the official app as long as you obey the license.
The most interesting part in the app is the connection handling: https://github.com/openhab/openhab-android/tree/master/mobile/src/main/java/org/openhab/habdroid/core/connection. You can call getUsableConnection() from (nearly) everywhere in the app and get a http client with url, username and pw set.
I want to encourage you to fork the official app, so you can contribute it back.