Printing emojis is cool, but it would be even better if we could make a gesture controlled keyboard. This exercise only works on Linux and MacOS so, if you're running Windows, try teaming up with a MacOS or Linux person for this part.
Open ArduinoSketchs/Emoji_Test/Emoji_Test.ino, in the Arduino IDE. Note that this code breaks some Arduino conventions by using #define.
In the code, uncomment the #define for LINUX.
#define LINUX
In the code, uncomment the #define for MACOS.
#define MACOS
For MacOS, you also need to enable support for emoji keyboards. Open System Preferences. Choose Keyboard. Select the Input Sources tab. Press the plus button. Search for 'other'. Choose 'Unicode Hex Input'. Press that add button.
Compile and upload the code onto your Arduino using Sketch -> Upload. Open a new Google Doc or another editor that supports emojis. Use your mouse to set focus into the editor. Shake the Arduino to activate the accelerometer and a bicep emoji 💪should appear.
Now you are ready to build a keyboard. Create a new sketch in the Arduino IDE. Combine the code from IMU_Classifier and the Emoji_Test to create an emoji keyboard. Where a gesture is recognized print out the corresponding emoji using the USB Keyboard.
NOTE: once you load code that runs the USB Keyboard, the Arduino IDE might not be able to see the serial port when you want to load new code. Double click the reset button on the Nano 33 BLE Sense before you run Sketch -> Upload.