we would like to develop very simple turn on/off smart home devices which can be discovered locally via UPnP like belkin wemo or Philips hue. I like to avoid a manufacturer device cloud as well as installing an additional skill.
I have found this example that explains best what i want: http://www.makermusings.com/2015/07/13/amazon-echo-and-home-automation/
But this example only emulates the interface of belkins wemo. I couldn't find any documentation for local connected devices.
Is this interface only dedicated to couple manufacturer like belkin and Philips?
Is there a partner program where we can contribute an own UPnP interface?
If not, what is the best way to develop Alexa Smart Home devices as a manufacturer? (Avoiding own device cloud)
Best regards Max