View source for Saving sensor data to a file

== Overview ==
* In this lesson we are going to learn how to save our sensor data to a file. 
* Saving data to a file will keep it safe. 
* Once data is in a file, we can read the data again and make a graph.
* Reading, saving a graphing data is very important for all environmental and Citizen Science activities. 
* Sensors often deliver data a numerical data. Some simple examples are  temperature, time, speed, counts, etc. 
* In this example we are going to save our data as a String (or text). 
* Most files store data as text. In this example we also need to separate the data using commas (,). 
* If data is separated by commas it makes each data element human readable and other programs, such as Spreadsheets, can also read the file more easily.

== Learning Objectives ==
* Learn how convert numerical data into a String (or text)
* Learn how to save data to a new empty file
* Learn how to read a saved file and check for data integrity