Add moving average for battery values in OBPSensorTask

lib/obp60task/movingAvg.h

@@ -0,0 +1,29 @@
+// Arduino Moving Average Library
+// https://github.com/JChristensen/movingAvg
+// Copyright (C) 2018 by Jack Christensen and licensed under
+// GNU GPL v3.0, https://www.gnu.org/licenses/gpl.html
+
+#ifndef MOVINGAVG_H_INCLUDED
+#define MOVINGAVG_H_INCLUDED
+
+class movingAvg
+{
+    public:
+        movingAvg(int interval)
+            : m_interval{interval}, m_nbrReadings{0}, m_sum{0}, m_next{0} {}
+        void begin();
+        int reading(int newReading);
+        int getAvg();
+        int getAvg(int nPoints);
+        int getCount() {return m_nbrReadings;}
+        void reset();
+        int* getReadings() {return m_readings;}
+
+    private:
+        int m_interval;     // number of data points for the moving average
+        int m_nbrReadings;  // number of readings
+        long m_sum;         // sum of the m_readings array
+        int m_next;         // index to the next reading
+        int* m_readings;    // pointer to the dynamically allocated interval array
+};
+#endif