MIT App Inventor -- How to Receive Data
The MIT App will look for changes in the data string as the Arduino sends the number of slots counted
In our case we are looking for distance travelled and time taken.
This data is broken into two variables for the line graph to display on the phone and tablet screen.
MIT App will use the received data as the 'y' variable for the graph of distance for each additional second of travel.
The entire programming app in MIT Appinventor is only dozen or so "blocks".