Connecting IoT devices to the Watson Conversation Car-Dashboard app
Using "Watson Conversation Speech to Text" to control a simple physical IoT device
It has been a couple of months since I did anything "exciting", I just noticed this great developerWorks recipe and thought, "Hey, I've got to share that, it's pretty awesome!".
It also contains the code to get you up & running, see section (6) at the bottom of the page.