The following resources may be useful working with the Bluefruit nRF52 Feather:
- Adafruit_nRF52_Arduino: The core code for this device (hosted on Github)
- nRF52 Example Sketches: Browse the example code from the core repo on Github
- Hardware Design Files: EagleCAD files for the nRF52840 Feather Express on Github.
- 3D Models on GitHub
- PDF for nRF52840 Feather PrettyPins Pinout Diagram
The Bluefruit nRF52840 Feather Express uses the MDBT50Q module from Raytac. Details on the module, including FCC and other certifications are available in the document below:
The board files are available on Github, and the board has the following physical layout: