Use new status values parser from client library in iOS console
Guard against the error handler being NULL
Added a registry to manage known sensors and their links to widgets (model object of widget)
Changed API to use set and not array of sensor ids (order is irrelevant) and changed name to made it clear we're passing ids, not sensors themselves
In controller, get values of sensors on configuration load and start polling mechanism
Update sample application to observe changes on model objects and update UI accordingly
Some comment on usage of KVO vs notification