introduce dispatch method to simplify things

src/Sprocket.h

@@ -6,6 +6,9 @@
 #include <FS.h>
 #include "Network.h"
 
+using namespace std;
+using namespace std::placeholders;
+
 struct SprocketConfig {
     int startupDelay;
     int serialBaudRate;
@@ -25,6 +28,7 @@ class Sprocket {
         virtual Sprocket* activate();
         virtual Sprocket* activate(Scheduler*) { return this; }
         virtual Sprocket* activate(Scheduler*, Network*) { return this; }
+        virtual  void dispatch(uint32_t from, String &msg) {};
 };
 
 #endif