Data Logging with the MINDSTORM® EV3

• • • Open each program and connect a powered up robot

    •  With one of the programs active you will click on the Download button located in the bottom right (it looks like a down arrow).

    • Repeat this for each of the programs.

    • You are now ready to run the program on the robot.

• With the robot on, press the right button once (moving to the files screen)

• Press the down button until you highlight the program you want to run, then press the center button

• You should now see this screen with the word program under the selected program. Press the down button to highlight program.

• When you have the robot in place and are ready for the robot to start, press the center button

If you rather have a handout for the students to complete this, it is attached at the bottom of the page.

• With the computer turned on, Connect the EV3 to the computer using a usb cord

• Turn on the EV3

• Open the EV3 program on your computer

• When the software opens you should see this screen

  • Go to File and select Open Project

  • When the list of programs appears select one of the EV3 programs (i.e Walk40EV3)

• When the file opens

• You will see this screen and you will click on the Brick Information button, as shown by arrow number 1 here

• Then click the Open Memory Browser button shown as arrow 2

• This is the screen that should appear

• You will now have two ways to delete files

  • You can delete all the files in each of the program folders

    • Select a folder and then press delete

    • You can delete only the data files, you would not have to reload the programs if you do this.

      • Double click the folder to show the list of files.

      • Select each of the MyData files and click delete

  • Click the closed button

• • Now with the Memory cleared you may need to reprogram the robot if you deleted all the files during the process above.  If you did, then you will download the programs again using the walk40EV3, walk60EV3, walk80EV3 programs.

• With the computer turned on, Connect the EV3 to the computer using a usb cord

• Turn on the EV3

• Open the EV3 program on your computer

• When the software opens you should see this screen

  • Step 1 - Select New Experiment

  • Step 2 - Select New Experiment

  • Step 3 - Click Open

• When it opens, You should have a blank analysis screen as seen here.

  • It should indicate that your EV3 is connected

  • You should see the upload button now in the lower right corner

  • Click the upload button indicated by the arrow here

• You should now have the Data Log File Manager box open

  • Navigate to the log files that were just collected during the activity

  • They will have to import each one separately and they will all appear on the one screen so Warn them to only select the two they need first

    • This should be My Data and My Data_1

    • The other files would be additional runs they completed

• When they first upload the data the scales will be set with the max range. This prevents them from seeing the intersections.

• Rescale the data by adjusting the scale on each scale bar on the left

• When they move the mouse over the scale at the midpoint they will see an image appear as indicated by the arrow here.

  • When it appears they should click to adjust the scale based on the data range

• To be able to see the exact data they should use the point analysis tool

• Click the microscope button and select point analysis

• When the tool opens they will be able to click on the line and drag it to each point where the robot crossed a black line (brown line minimum)

• The chart will then provide the exact rotation data for the motors at that point

  • If the motor data is not in rotations it can be changed in the sensor setup box by selecting rotations for the motors

  • They should now repeat this for all of the experiments they need to collect data for to complete the activity