https://dev.blues.io/guides-and-tutorials/collecting-sensor-data/notecarrier-f/adafruit-feather-m4-express/c-cpp-arduino-wiring/
Sensor Tutorial with C/C++ (Arduino/Wiring), Adafruit Feather M4 Express, and Notecarrier F
Build an MCU-controlled application that reads from an external sensor and sends readings to the Notecard to start building your IoT application using...