/**
@defgroup    boards_feather-nrf52840-sense Adafruit Feather nRF52840 Sense
@ingroup     boards
@brief       Support for the Adafruit Feather nRF52840 Sense

### General information

[The Feather nRF52840 Sense][feather-nrf52840-sense] is a development board
from Adafruits Feather board family. It is very similar to the [The Feather
nRF52840 Express][feather-nrf52840] but comes with more sensors.

It provides native USB support, Bluetooth
Low Energy and IEEE 802.15.4 support via the nRF52840 MCU.

![top-down view on feather-nrf52840-sense][top-down view]

[feather-nrf52840]: https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/
[feather-nrf52840-sense]: https://learn.adafruit.com/adafruit-feather-sense
[top-down view]: https://cdn-learn.adafruit.com/assets/assets/000/089/096/original/sensors_Feather_Sense_top.jpg

### Flashing, Bootloader, and Terminal

Refer to [The Feather nRF52840 Express
documentation](https://doc.riot-os.org/group__boards__feather-nrf52840.html) for further details.
Both use the same flasher, bootloader, and terminal settings.

On "fresh" boards the
[bootloader may need to be updated](https://learn.adafruit.com/adafruit-feather-sense/update-bootloader)

#### Updating Old Bootloaders

In some cases the bootloader may be too old to even mount on startup.
Double tap the reset button to get into bootloader mode and check the
`INFO_UF2.TXT` for bootloader information.
If the version is less than `0.4.0` then one can use the
[Adafruit_nRF52_Bootloader](https://github.com/adafruit/Adafruit_nRF52_Bootloader)
tool to update.

For example, one can run the following if `arm-none-eabi-gcc` and
`adafruit-nrfutil` are installed:
```
git clone https://github.com/adafruit/Adafruit_nRF52_Bootloader.git
cd Adafruit_nRF52_Bootloader
git submodule update --init
make BOARD=feather_nrf52840_sense SERIAL=/dev/ttyACM0 flash-dfu
```
*/