📅 Sun, Mar 19, 2017 ⏲️ ~ 1 minutes

Arduino Mean Filter Library

The Mean Filter library implements a moving average filter. The library stores the last N elements of the window and calculates the mean. A circular buffer is used to maintain high efficiency.

The Mean Filter class uses templates to allow it to work with different types (int, long, float, …). However, it is important to note that the filter stores N values of the selected type, which can cause overflow if the filtered values and/or N are large. In this case, the filter must be instantiated in a type of size larger than that of the filtered signal (for example long for int values).

For more information, consult the entry Implementing a moving average filter in Arduino.

Usage Manual

Constructor

The moving average filter is instantiated through its constructor, which receives the window size as the only parameter.

MeanFilter<T> meanFilter(windowSize);

Using the filter

// Add a new value to the filter and return the filtered value
meanFilter.AddValue(value);

// Get the last filtered value (the same as the one returned when adding the value to the filter)
meanFilter.GetFiltered();