I'm on writing an Android App thats purposed to hand commands (or better data) to a running c daemon on another machine in the same network (should also work from an external network sometimes in the future), but I have problems to choose the best way (or protocol) to do that.
Communicating with an sort of API (PHP, Python, etc.) isn't really a option (maybe I'm wrong with this) because that data is time critical, should be the fastest way thats possible, so I trying to avoid the overhead coming with http and another thing between the daemon and the APP. On the other hand the daemon should be accessible by an local running PHP script too (there should be an API in the future, so maybe the extra "layer" isn't that critical?). But even if I choose the API solution, what's the best way then? Sockets, general IPC?
Any suggestions or experience with a similar situation would be helpful.