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.