I have a Teensy4.1 board, which is an Arduino. On windows, I use the tool Arduino 1.8.13 to compile the C code. I've loaded the library phidget21 and I have included the library. The code is: #include <phidget21.h> void setup() { ... CPhidgetSpatialHandle spatial = 0; CPhidgetSpatial_create(&spa...