I want to be able to send commands to the Yun from a computer or smartphone, and receive messages back as well. The device talking to the Yun will always be on the same LAN as the Yun - no need to talk to the Yun over the internet. I've looked at a few options, and don't see anything as simple as there probably is out there. "Pusher" looked promising, but after looking at the code, it appears that Pusher requires you to connect to the pusher "broker" at ws.pusherapp.com. I don't want to have to assume that there is WiFi connectivity to the internet, so that doesn't work.
Could someone please recommend a method of inter device communication?