This library contains code that's used in several hardware projects:

• the furball environmental sensor, dustball (merged into furball)
• butterball high temperature sensor
• the vendo firmware for the discoball LED controller,
• waterball
• hydroponics sensor
• powerball power consumption sensor and
• dirtball garden sensor

Splitting it into its own library allows it to be easily reused and allows the projects to be very modular.

See also the Multiball Sensor library, which contains highly uniform and modular sensor code that is also reused among projects.

Unless you're working with one of the "ball" projects you almost certainly don't want to use this library. It's designed to accomodate the specific needs of these projects and not for general use.