Hey, I'm new to Arduino and I wanted to ask if there is any sensor I could use that is actually monitoring the movement of the sensor itself and not something like a PIR. Thanks in advance.
Any accelerometer is capable of doing that (p.e. MPU6050).
A microwave motion detector will sense its own movement.
And any distance sensor will sense its own movement if the object it is pointing at is fixed, and the movement has a radial component (towards or away from the object).
There's also GPS (outdoor) or Pozyx (indoor).
Thanks you all!!