Settings

GPS

Here you can enter connection information on your GPS receiver. Select the correct device and baud rate for your GPS. Please refer to your GPS manual for these values. For most serial devices, device /dev/ttyS0 will do. For Bluetooth devices use /dev/rfcomm0, for N810 use /dev/pts/0. The default NMEA connection speed is 4800 bps for bluetooth we recommend to use 115200 bps. If your device not contained in the selection list, you can change one of the predefined entries to your need.

Some gps devices can be initialized by saved position data to find a satellite signal more quickly. To enable this check Soft start. If this does not work, a Hard start can be forced when Cumulus starts up. If there are still problems to get the device working, a Reset to factory settings can be initiated by pressing the button.

Most of the GPS devices send MSL (mean sea level) altitudes but some send HAE (Height above elipsoid.) If your displayed altitude deviate always by a constant factor, try the other setting for your GPS. If that will not help, you can select the Altitude User mode and add an own altitude correction in the spin box below.

Cumulus can provide you with some status information on your GPS reception. If you want to know what satelites are in view, where they are, how strong their signal is, or if you want to take a look at the raw NMEA stream of your GPS, use the G key or click on the GPS status indicator in the statusbar. This will open a status dialog for the GPS. The dialog can be closed with the Escape key.

Cumulus is able to synchronize the PDA system clock to the GPS time, if the option Update system clock is activated. But this will only work, if cumulus is running as user root. On Nokia Internet tablet this will not work.

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