This Indigo 6.0+ plugin allows Indigo to control Onkyo receivers via their network (IP) control protocol. Onkyo's protocol is very robust and, as a result, this plugin is able to both read and set nearly every aspect of the receiver - even features that are buried very deep in the menu system. To simplify the actions and plugin, I have omitted various commands that did not seem common - such as test tones and launching the built-in surround analyzer. These types of features generally do not add to the home automation control experience, but if something is missing that you desire, please do not hesitate ask and I can add as appropriate.
The latest version of the plugin is available for download link. Download the ZIP container, unzip, and double click the plugin file.
Please see the Onkyo Receiver forum for more information.