How to do Gesture identification through machine learning on Arduino

In this Arduno Machine learning project we're going to use an accelerometer sensor to identify the gestures you play. This is a remake of the project found on the Tensorflow blog. We're going to use a lot less powerful chip in this tutorial, tough: an Arduino Nano (old generation), equipped with 32 kb of flash and only 2 kb of RAM. We're going to use the accelerations along the 3 axis (X, Y, Z) coming from an IMU to infer which gesture we're playing. We'll use a fixed number of recordings (NUM_SAMPLES) starting from the first detection of movement.