Inital test (from beerduino, https://github.com/ilyevsky/beerduino) to establish protocol buffer communication between java and arduino powered by purejavacomm (https://github.com/nyholku/purejavacomm).

src/main/proto/beerduino.proto

@@ -0,0 +1,10 @@
+package beerduino;
+
+message Ping {
+	required int32 id = 1;
+}
+
+message Echo {
+	required int32 id = 1;
+	optional string message = 2;
+}