In LibreOffice Calc, I set the chart to only show the
data, not the datetime since I already know that the data
is taken at five second intervals. The datetime data is in
unixtime which (as we’ve seen) is the number of
seconds since January 1, 1970, and we can take that
data and display it anyway we want. This isn’t
relevant at the moment, so I left it out.
Use the LibreOffice Calc File menu to browse to
the datalog.csv file, then open it and display the data
as you were shown earlier with the sine data as
shown in Figure 18.
This is the last of my six part series on the
Arduino handheld prototyper. In these articles, we’ve
learned a lot about using the Arduino proto shield
and the I2C mini terminal combined into the AHP.
Now, you can create your own Arduino designs that
can be used remotely to talk to someone using a
small LCD and five-button navigation system.
You can keep track of the dates and times, and
you can store a small amount of data on the Arduino or a
large amount of data on an SD card.
Now, go forth and create. NV
64 December 2013
MADE IN THEUSA
B YPANAVISE PRODUCTS,INC.
■ FIGURE 18: Sensor data in LibreOffice Calc.