Grove/Header SunAirPlus - Solar Controller/Charger/Sun Tracker/Data Gathering Includes Open Source Software for Arduino and Raspberry Pi Solar Power System Board for your Arduino / Raspberry Pi SunAirPlus includes high quality data gathering ADCand sensors for Voltage and Current (Battery / USB / Solar Cells) You can use this board to power your projects and add a servo or stepper motor to allow it to track the sun using photoresistors to generate even more power! It incorporates a number of outstanding features in a very compact, inexpensive single fully assembled and tested PC Board. Full Documentation and Software on www.switchdoc.com