Terminal image is of Tera Term running a UART connection to the ATMEGA m168p. The readout, "012", indicates the distance in inches. Thus, the terminal is showing a book I held, orthogonally to the direction of the pulse, twelve inches from the ultrasonic detector.

The graph is a Python script to graphically display the values from the ultrasonic rangefinder. The two major modules used are Pyserial and PyQtGraph.

Neither the C files nor the Python files are written for public understanding. Therefore, the comments and code might not be explicitly clear to some. I have no intention, as of writing this, to improve its readability.