Datasheet

To send keyboard data, type anything into the textbox at the top of the Serial Monitor and click the Send button.
Bonding the HID Keyboard
Before you can use the HID keyboard, you will need to 'bond' it to your phone or PC. The bonding process establishes
a permanent connection between the two devices, meaning that as soon as your phone or PC sees the Bluefruit LE
module again it will automatically connect.
© Adafruit Industries https://learn.adafruit.com/adafruit-feather-32u4-bluefruit-le Page 61 of 211