The Adafruit Feather nRF52 Pro is another Bluetooth® Low Energy board for advanced projects and users who want to use a fully open-source Bluetooth® Low Energy 5.0 stack. It has a native Bluetooth chip, the nRF52832, as well as built-in USB Serial and battery charging!  We have other boards in the Feather family, check'em out here.This is a special Feather - unlike the rest of the Feather family, this board is not for use with Arduino IDE. Instead, it is for use with...