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VI. Terminal Access to Service Menu
The Service menu allows you to change the Device’s settings and view diagnostics data. Note that
we recommend using the application’s settings to filter NMEA messages instead of the Device settings,
because Device settings have a global effect and sometime later you may be surprised that some things
are not working in other applications.
To begin, you should put the Device in the service mode with the YDNU MODE SERVICE command
from the operating system command line (shell). For example (please, see the explanation of command
syntax in the previous chapter):
echo YDNU MODE SERVICE > COM3
echo YDNU MODE SERVICE > /dev/cu.usbmodem00090001
stty -F /dev/ttyACM1 hupcl
echo YDNU MODE SERVICE > /dev/ttyACM1
The command will be confirmed by a signal of Device’s LED. Note that the service mode will be active until
you set the operation mode or turn the Device off.
To access the service menu, you need a terminal application. Unlike Mac OS X and Linux,
Microsoft Windows does not contain a terminal application (since Windows Vista). We recommend
the freeware program, Putty, which is available for Microsoft Windows and Linux. You can download
it here:
http://www.putty.org/
When the Device is in the service mode, type the following command from command line or shell to access
the service menu:
putty.exe -serial COM3
screen -a /dev/cu.usbmodem00090001
screen -a /dev/ttyACM1
stty -F /dev/ttyACM1 hupcl
