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### Settings

GPS

Here you can enter connection information on your GPS. 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 Compact Flash /dev/ttyS3 is most common. Cumulus can also detect the correct device automaticly for compact flash units. Choose "CF" to autodetect a CF gps. The default NMEA connection speed is 4800 bps.

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.

Cumulus is able to synchronize the PDA system clock to the GPS time, if the option Update system clockis activated. But this will only work, if cumulus is running as user root.

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