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    TESTING THE MAGIC PAD APP
                      Follow the given steps to test your app on a smartphone:

                      Step  1    Download and install  the  MIT AI2 Companion app  on
                               your mobile phone from the Google Play Store.

                      Step  2   Click on Connect from the top menu.

                      Step  3   Click on AI Companion from the drop-down menu.
                                The Connect to Companion message box appears.

                                                  Step  4    Open MIT A12 Companion on your device and connect by
                                                           scanning the QR code or typing the code displayed on your

                                                           screen.
                                                           After testing, ensure the app  draws smoothly  with your
                                                           finger, changes colours with button taps and clears correctly

                                                           with the Reset button.

                                SENSORS

                      A sensor lets an app interact with the environment by detecting motion, location, sound and
                      more. They are found in the Sensors category of the Palette.

                      TYPES OF SENSORS

                      There are many different types of sensors as discussed below:
                          Accelerometer Sensor: It detects phone movement, shakes or tilts. It is used in games for tilt

                        control, fitness apps for tracking and security apps for drop or theft detection.
                          Barcode  Scanner: It reads codes  on objects and is used  in apps for  shopping,  library

                        check-ins and more.
                          Clock Sensor: It tracks time for timers, alarms and real-time updates, used in apps like alarms,
                        reminders and fitness.

                          Gyroscope Sensor: It measures device rotation and tilt, used in VR apps and motion-based
                        games.

                          Hygrometer Sensor: It measures air humidity and is used in weather and agriculture apps to
                        monitor conditions.

                          Light Sensor: It detects light and is used to adjust screen brightness or enable night mode.

                          Location Sensor: It uses GPS to find the device’s position.

                       64   Computer Science (V5.0)-VI

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