By default, all OSC messages are send to the multicast IP address 230.0.0.1 on port 7447 to all listening hosts on the local subnet.
The EasyOsc addresses follow a common pattern:
/<registered name>/<direction>/<method or variable name>.
Direction is either in or out, relative to the program running EasyOsc.
If you’d like to get Processing (or any other Java program) to communicate with an OSC-capable system, you should be able to follow these patterns to establish an OSC channel.
For instance, here’s a fragment of Chuck code that would call a setBrightness method of a sketch registered as my_sketch:
OscSend xmit;
xmit.setHost("230.0.0.1", 7447);
xmit.startMsg( "/my_sketch/in/setBrightness", "f");
0.8 => xmit.addFloat;