Linx Technologies MDEV-GPS - Manual (Page 7)

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The Display Section
The Master Development System features an OLED screen that displays
the navigation information from the receiver module. This allows the
development board to act as a stand-alone evaluation system without the
need for any additional software.
The display is driven by an on-board microcontroller located under
the display. Data from the receiver module is connected directly to this
microcontroller. The microcontroller receives data at the receiver’s default
9,600bps.
The display and microcontroller pull about 100mA when fully powered, so
a power switch is supplied to deactivate the display area when not in use,
saving battery life. To protect the display and extend its life, be sure to turn
the display section off before turning off the main power to the board.
Figure 7: The Development Board Display Section
Note: If the receiver’s baud rate is changed, it will not be able to
communicate with the microcontroller.
Master Development Software
The development system is supplied with Windows-based software that
communicates with the development board through the USB module. This
software displays the information from the receiver module in the different
NMEA formats and the satellite information, signal strength, and positions
are displayed graphically. If the PC is connected to the internet, the
software plots the current location on Google Maps. Full details are in the
software’s User’s Guide.
Figure 8: Master Development Software