The Adafruit Feather nRF52 Bluefruit is another easy-to-use all-in-one Bluetooth® Low Energy board, with a native-Bluetooth® chip, the nRF52832!  It's our take on an 'all-in-one' Arduino-compatible + Bluetooth® Low Energy with built in USB and battery charging. We have other boards in the Feather family, check'em out here.This chip has twice the flash, SRAM and performance of the earlier nRF51-based Bluefruit modules. Best of all, it has Arduino IDE support so there is no...