Waveshare UART GPS NEO-6M User manual

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UART GPS NEO-6M User Manual
Features
U-BLOXNEO-6M module with high-gain active antenna;
TTL level, compatible with 3V/5V systems;
Baud rate: 9600kbps (default), adjustable by u-center;
Provided IPXinterface for different active antennas;
Provided rechargeable battery backup, enabling to save ephemeris data on power
down;
Support hot start.
Parameters
Receiver type:
50 channels, GPS L1(1575.42Mhz) C/A code,
SBAS:WAAS/EGNOS/MSAS
Horizontal position accuracy:
2.5mCEP (SBAS:2.0mCEP)
Navigation update rate:
5Hz maximum (1HZ default)
Capture time:
Cool start: 27s (fastest)；Hot start: 1s
Tracking & Navigation sensitivity:
-161dBm
Communication protocol:
NMEA(default)/UBX Binary
Serial baud rate:
4800, 9600(default), 19200, 38400, 57600, 115200, 230400
Operating temperature:
-40℃~ 85℃
Operating voltage:
2.7V~5.0V(power supply input via VCC)
Operating current:
45mA
TXD/RXD impedance:
510Ohms
Applications
This module can be applied to navigator, aircraft positioning, etc.
Hardware
1. Acomputer with Windows XP/Win7/Win8 OS;
2. An USB to TTL serial module, such as FT232, PL2303, CP2102, etc. If there is a
native serial port in the computer, a DB9 to TTL serial module may be used;
3. AUART GPS NEO-6M module.

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How to use
1. Connect the UART GPS NEO-6M module to a serial module. FT232 is applied as
the serial module in this document.
The connection between the GPS module and the serial module is listed as the
table below.
UART GPS NEO-6M module pins
Serial module pins
VCC
3.3V/5V
GND
GND
TXD
RX
RXD
TX
PSS*
* PPS should be connected to the clock pulse output (CPOUT) of a MCU. However, this pin is
unconnected, in the case that the GPS module is connected to a computer.
2. Connect the serial module to the computer.
3. Start the serial debugging assistant, and set the serial port as below:
Select the corresponding serial port in the PortNo option. In this example,
COM8 is selected.
Baud rate: 9600(default).
8 data bits, 1 stop bit, no parity and no flow control.
4. After finishing the settings, you can see the serial debugging assistant will show
many data in its window, as the figure shows below.
The data shown in the figure above means that the connection is established
successfully, but it is unable to perform positioning.
In this case, please place the GPS module to the balcony or near the window, or
outdoors for testing, because GPS is less stable in searching signal indoors.
1. After waiting for a while, if the serial debugging assistant lists similar data in its
window as the figure shows below, it means GPS has performed positioning.And
you can see that the LED on the module, which remains on when GPS is unable
to perform the positioning, is flickering now.

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Notice: For its first positioning after cold starts, GPS module normally takes 1-3
minutes to finishing this positioning successfully in the open air with a good
weather. So, please be patient. Moreover, if there is a bad weather, it may take
more time for positioning, or even unable to perform positioning sometimes.
2. Install software\u-centersetup-7.0.2.1\u-centerSetup-7.0.2.1.exe (please ensure
you computer is connected to Internet).
Start the software, u-center, and you can see the interface as the figure shows
below.
3. Click Receiver menu, and select Port option to configure the actual serial port
number and Baud rate: 38400(default).

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Click the button to connect to the NEO-6M GPS module.
u-center will show the information as below:
4. Install a plug-in, GoogleEarthPluginSetup.exe, for a better view. After finishing the
installation, select Google Earth under the View menu in the u-center.
Notes: There may be some differences between the reality and the result shown
by Google Earth, because of GPS static drift.
Appendix
How to modify the baud rate via u-center?
1. Select View->Messages View, and unfold UBX->CFG(Config)->PRT(Ports).
Then choose the baud rate you want to use in the Baudrate option, and click
the button Send to complete the modification. The figures below show the
steps in details.

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2. Right now, if the module is powered off, the setting of the baud rate will
be restored to 9600. To remain the settings, you should save the
configuration information into the memory, following the steps listed
below.
①Configure the baud rate, as the figure below shows.
②Unfold UBX->CFG(Config)->CFG(Configuration), and then select
2-I2CEEPROM in the Devices option. Click the button Send to save
the configuration. The figure below shows the steps in details.

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After a successful positioning, you will receive a lot of information, as the figure
shows below.
What are the meanings of the information?
We will illustrate these information with an example of
$GPRMC,030742.00,A,2232.73830,N,11404.58520,E,0.356,,070314,,,A*77
1. Firstly, open the document chip PDF\NMEA0183.pdf
Secondly, find the relative explanations of GPRMC, as the figure shows.

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2. The meaning of each field in
$GPRMC,030742.00,A,2232.73830,N,11404.58520,E,0.356,,070314,,,A*77
is listed as below.
030742.00
UTC time; since the test location is Eastern eight zones, the actual time
should be 03+8=11(hour):07(minute):42(second)
A
Position state; it indicates valid
2232.73830
Latitude value
N
The Northern Hemisphere
11404.58520
Longitude value
E
The Eastern Hemisphere
0.356
Ground speed; 0.356knot (1knot =1 nautical mile per hour，which is
equivalent to 0.5m per second)
070314
UTC date; it indicates 7th March, 2014
A
Mode indication; it is in AssistNowAutonomous mode
77
Checksum; it is the result of XOR operation on the ASCII code of all the
characters between $ and *
For more detail instructions about u-center, please refer to
software\u-centersetup-7.0.2.1\User_Guide.pdf