FAQ

Go to "Create Track" page.

The track layout is used to plot the track during the session on the "JVChrono" or "Track" screen.

You can create it manually or it can be created automatically during the first lap of the session. In point-to-point tracks, the layout must go from the start line to the finish line. In loop tracks it does not matter at which point the layout starts, but using the start / finish line is recommended. The last point should be near the first point, although it is not needed to match perfectly.

The red line allows to rotate the plot of the track, allowing for example to leave horizontal the main straight of the track. To modify this line you have to press and drag the red mark.

Laptimer mode is designed to calculate lap times, but it can also be used to record data without selecting any track.

• In "Loop" tracks the start line matches the finish line.
• In "Point-to-Point" tracks the start line does not match the finish line.

The "REMOTE" mode allows you to connect the phone to another phone for the following functions:

• Remote sensor: It allows to install the phone in remote mode on the steering wheel of a car or in the chassis of a byke and to send the sensor data to the main device. In this way the main phone can be installed in a visible and accessible place for driving, while the secondary phone sends the data from a not easily accessible place.
• Remote camera: It allows to use the secondary phone as an action camera controlled from the main phone. In this way the main phone can be installed in a visible and accessible place for driving, while the secondary phone is installed in the right place to record videos. The video is recorded and stored on the secondary phone that uses the remote mode.

On the secondary phone you have to launch the remote mode, while on the main phone you have to launch the laptimer, route or drag race mode. In the main phone you have to select in settings the phone to be used as remote sensor or camera.

The app does not automatically detect the track you are in, it has to be selected at the beginning of the session.

If we select the option "Auto-Create start", the app will automatically create a track when it detects that you have passed twice through the same point, calculating lap times after that.

When pausing the session, the app tries to keep the bluetooth devices connected and maintains the sensors calibration when resuming the session.

When stopping the session, the app allows bluetooth devices to be disconnected. When starting again the session, the app will try to reconnect all bluetooth devices and it will be required to repeat the sensor calibration.

To calculate the angle of the steering wheel or lean angle of the byke, it is necessary to calculate the position of the device in the vehicle. Since in each session the installation of the device may be different, it is required to perform the process each time.

Accelerometer calibration can be found in the settings and only needs to be done once. This calibration allows to increase the precision.

From the android version 6.0, the battery optimizer can affect the behavior of the app when it works in background (screen off during session). To avoid this, apply one of the following methods:

• Charge the device if the display is off during the session.
• In the device battery settings, include "JV Chrono" within the apps not affected by battery optimization.
• Disable the battery optimizer.

If it is not possible to connect to a Bluetooth device (GPS, OBD or other device) make sure that the bluetooth device:

• Is selected in the app settings.
• Is correctly paired in the phone settings.
• Is not connected to any other phone.