IDE Serial Monitor program (Figure 3) to make sure it all
works. Adjust the pot shaft to create different values that
should range from 0 to 1023. If that all works properly,
then you’re ready to connect to MakerPlot.
Before you go any further, however, close the Arduino
Serial Monitor program. This will free up the comm port
for MakerPlot. Also, make sure that the virtual comm port
number assigned to the Uno is 15 or lower; currently,
MakerPlot has a problem with comm ports greater than
15. This will be corrected in a future release.
Installing and Connecting
If you haven’t already done so, go to
www.makerplot.com and click on the Free
Trial Download menu link to download
MakerPlot as a 30 day free trial and install it
on your PC. The trial version is exactly like
the commercial version except that your
comm port connection times out after three
minutes. Then, you’ll need to reconnect for
another three minute session. Otherwise, the
trial version is the same as the commercial
version. Follow the instructions for installing
MakerPlot and you’ll
be ready to go to the
Figure 4 shows the
Desktop icon that
appears after the
installation is complete.
Click on the Desktop
icon and the Sign On
(Figure 5). Click on the
Interface button (middle left) to bring it up (Figure 6).
Verify that the Control menu panel looks something like
Figure 7. Our port number is 9. While yours may be
different, it shouldn’t be over 15. If it is, go to the
Windows Device Manager ➔ Ports (Com & Lpt) ➔
Arduino Uno R3 (comm port) and change it to a lower
If the above looks good, then click the red rocker
switch in the Control menu. It will change from red to
green; you should see a black horizontal line being
plotted across the Standard Interface screen. Adjust the
pot shaft and the plot should begin to move up and down
correspondingly (Figure 8).
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Figure 3. Arduino IDE
serial monitor test.
Figure 5. MakerPlot sign on interface.