Store Doxygen to master

src/Timer.h

@@ -1,11 +1,39 @@
 #pragma once
 
+/**
+ * @brief A Timer that remembers a starting time and interval allow easy periodic events
+ *
+ * This class is for simple timing of things in the loop function where it will determine
+ * if some amount of time has elapsed. When it is checked after the time has elapsed
+ * then the timer is reset to simplify restarting the next interval.
+ * Think of printing periodically.
+ */
 class Timer
 {
 public:
+    /**
+     * @brief Construct a new Timer object
+     * 
+     * @param interval 
+     */
     Timer(unsigned long interval);
+    /**
+     * @brief Checks to see if the timer has expired.
+     * 
+     * @return true If the timer has expired, and the timer is reset for another interval.
+     * @return false If the timer has not expired.
+     */
     bool isExpired();
+    /**
+     * @brief Reset the timer to the current time + interval.
+     * 
+     */
     void reset();
+    /**
+     * @brief Reset the timer with a new interval
+     * 
+     * @param newInterval 
+     */
     void reset(unsigned long newInterval);
 
 private: