Try downloading from inside Add-On explorer. To do this -
1) Click on Add-Ons > Get Add-Ons from MATLAB toolstrip.
2) Search for this add-on and click on Add icon.
4) Unpackage the zip into local directory and rename the folder to ‘Ultrasonic’.
5) Move the ‘Ultrasonic’ folder into the "libraries" folder inside your Arduino sketchbook folder:
On Windows, the default path is "My Documents\Arduino\libraries\"
On Mac, the default path is "~/Documents/Arduino/libraries/"
On Linux, the default path is "/home/<username>/Arduino/libraries"
If this does not resolve the issue, try moving the Ultrasonic to the following location. To get the location,
1) Type winopen(arduinoio.IDERoot) in MATLAB.
2) Open Arduino IDE located here.
3) Click on Files > Preferences and note down the sketchbook location here.
4) Paste the Ultrasonic library in this location.
