SmartThings, the company behind a connected home hub, is walking the fine line between creating an open ecosystem for connected devices and a user experience that doesn’t make users toss up their hands in frustration. That’s not to say it hasn’t veered off that line in the past, but on Wednesday it announced an exit from the sensor business, new partners and a certification and publishing program for developers that will create an app store concept for the connected home. And, it updated its iOS app, with plans for the Android refresh coming within the next week or so. It’s been over a year since I first started talking to CEO Alex Hawkinson about the vision for SmartThings, a vision I personally buy into for the connected home. People don’t care about radios or some sort of unified vision as much as they will want to bring in a long tail of connected devices that works for their needs.