--- /dev/null
+#ifndef ACTIVITY_H_
+#define ACTIVITY_H_
+
+#include <msp/time/timedelta.h>
+
+class Activity
+{
+private:
+ float average;
+
+public:
+ Activity();
+
+ void add_bytes(unsigned);
+ float get_average() const { return average; }
+
+ void tick(const Msp::Time::TimeDelta &);
+};
+
+#endif