Vernier Software and Technology
Vernier Software & Technology
Tech Info Library

How do I use Google Science Journal with Go Direct sensors on Android?

Vernier and Google introduced support for Go Direct sensors with Graphical Analysis 4 for Android in 2019.

The information below is about using Google Science Journal with Vernier's Go Direct sensors only. For information on using Science Journal with the older Go Wireless devices, see TIL 3823: How do I set up Google Science Journal for data collection with Go Wireless sensors? .

The Google Science Journal app for Android can be used with many Vernier Go Direct Sensor Sensors.

For a list of sensors compatible with Google Science Journal, see:

The Science Journal app depends on the presence and correct configuration of Vernier's Graphical Analysis app for Android. You do not have to use Graphical Analysis in day to day use of Science Journal, but Graphical Analysis must be present and some one-time setup in Graphical Analysis must be performed.

Initial setup:

* Download and install the Vernier Graphical Analysis app from Google Play. Version 4.8 is the minimum version that supports Science Journal.
* Launch Graphical Analysis.
* Tap Sensor Data Collection to start a new experiment.
* You may be prompted to grant permission for Graphical Analysis to have location information. This is required as Bluetooth communication requires location permission. Vernier does not collect any location information.
* At this point you can use the Science Journal app. Note that only

Follow these steps to grant permission only if you have previously launched Graphical Analysis and then denied location permission:
* Open the Android device settings app by swiping down from the top of the screen twice and clicking on the gear icon.
* Tap the Apps subsection of the settings app.
* Tap the Graphical app entry with the GA icon
* Tap permissions
* Enable the Location and Storage permission

The remaining steps are all concerned with the operation of Google's Science Journal app. See Google for more details on using the Science Journal app.

* If Graphical Analysis is running, stop it by displaying all the running apps and dismiss it. If Graphical Analysis is running, Science Journal may not be able to see Go Direct sensors. If problem persists, “force quit” the app from settings.
* Launch Science Journal version 1.2.220 or newer. These instructions are based on version 3.0 and newer.
* If this is the first time the app has been run, you must certify that you are over 13 years old, and follow the tutorial.
* Turn on your Vernier Go Direct device.
* Create a Project, and create an experiment. Tap the observations icon to see sensor readings.
* Tap the Gear+ icon in the upper right corner of the Sensor card to open the "Sensor Settings" view to start a search for available sensors.
* Find the Vernier subsection under "Available Devices". The section will not be visible if a sufficiently recent version of Graphical Analysis is not installed.
* Note the spinner next to the Vernier Go Direct Sensors tab. It indicates that a search for wireless devices is ongoing. Each search lasts 10 seconds.
* If no sensors are present under the Vernier header, click the spinner to start a new search.
* Persistent lack of Vernier sensors appearing at this point is a strong indication that the user hasn't accepted the "Location" permission as described above. It is also possible that there are no Go Direct sensors nearby, or that the search for Go Direct devices has timed out and needs to be restarted by tapping the spinner next to the subsection of "Available Devices" for Vernier devices.
* Select the desired Go Direct Sensor; it will move to the upper list of available sensors.
* Select the desired channels of the Go Direct Sensor from the available sensor list. (There is a selection misbehavior in the Science Journal app whereby you check a channel, it shows as selected, and then clears itself. This is a problem in the SJ app. Even though the channel selection has cleared, the channel is active.)

Sensor Configuration
* No sensor configuration is possible in Science Journal.

After closing the sensor setup screen, you will find a "Sensor Card" containing tabs for each of the sensors you selected. Collection in this state will only include data for the sensor whose tab is exposed.

If you want to collect from all the sensors you selected, create cards for each by clicking the plus symbol beneath the bottom sensor card.

If you want to exclude some sensors that you previously selected, choose "close card" for any sensor you wish to exclude. To create a card for a given sensor, create cards for all the tabbed sensors until the sensor you want has a card.

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