The LUFA version is 100807, as in the hardware-pinoccio repository. This version is required for both DFU and USB serial firmware. The arduino-usbdfu directory contains the DFU bootloader on the 16U2 ...

An Arduino Core for ARM based BLE boards supported by the NimBLE stack. If you are interested in assisting the development of this project please submit issues and PR's. Or become a collaborator!