Holux GR-213U Manual de usuario

GPS Receiver

Dec. 25 2005

Rev. A

Technology, Inc.

1F.No 30, R&D Rd. II. Hsinchu City, Science-based Industrial Park Taiwan

Phone: +886-3-6687000 Fax: +886-3-6687111

E-Mail: [email protected] Web: www.holux.com

User’s Guide

GR-213U

TABLE OF CONTENTS

1. Introduction ..................................................................................3

1.1 Overview ............................................................................................................... 3

1.2 Features ................................................................................................................ 3

1.3 Technology specifications ..................................................................................... 3

2. Operational characteristics.........................................................4

2.1 Initialization............................................................................................................ 4

2.2 Navigation ............................................................................................................. 4

3. Hardware interface.......................................................................5

3.1 Dimension ............................................................................................................. 5

3.2 Hardware Connection............................................................................................ 5

4. USB Driver ....................................................................................6

4.1 System Requirements ........................................................................................... 6

4.2 Installation ............................................................................................................. 6

4.3 Important ............................................................................................................... 6

5. Software Interface........................................................................6

5.1 NMEA Transmitted Messages............................................................................... 6

6. Warranty .......................................................................................100

1. Introduction

1.1 Overview

GR-213U Smart GPS Receiver is a total solution GPS receiver, designed based on SiRF Star III

Architecture. This positioning application meets strict needs such as car navigation, mapping, surveying,

security, agriculture and so on. Only clear view of sky and certain power supply are necessary to the unit. It

communicates with other electronic utilities via compatible dual-channel through USB interface and saves

critical satellite data by built–in backup memory. With low power consumption, the GR-213U tracks up to 20

satellites at a time, re-acquires satellite signals in 100 ms and updates position data every second.

Trickle-Power allows the unit operates a fraction of the time and Push-to-Fix permits user to have a quick

position fix even though the receiver usually stays off.

1.2 Features

The GR-213U provides a host of features that make it easy for integration and use.

1. SiRFstarIII chipset with embedded ARM7TDMI CPU available for customized applications in firmware

2. High performance receiver tracks up to 20 satellites while providing first fast fix and low power

consumption.

3. Compact design ideal for applications with minimal space.

4. A rechargeable battery sustains internal clock and memory. The battery is recharged during normal

operation.

5. Users can adjust power-saving percentage (20%~80%), which achieves the best power efficiency.

6. User initialization is not required.

7. LED display status: The LED provides users visible positioning status. LED “ON” when power connected

and “BLINKING” when GR-213U got positioned.

8. Water proof design for industry standard.

1.3 Technology specifications

1.3.1 Physical Dimension

Single construction integrated antenna/receiver.

Size: 64.5 x 42 x 17.8 (mm)

2.54" x 1.65 x 0.7 (Inch).

1.3.2 Environmental Characteristics

1) Operating temperature: -40oC to +80oC(internal temperature).

2) Storage temperature: -45oC to +100oC.

1.3.3 Electrical Characteristics

1) Input voltage: +4.5 ~ 5.5 VDC without accessories.

2) Backup power: 3V Rechargeable Lithium cell battery, up to 500 hours discharge.

1.3.4 Performance

1) Tracks up to 20 satellites.

2) Update rate: 1 second.

3) Acquisition time

Reacquisition 0.1 sec., averaged

Hot start 8 sec., averaged

Warm start 38 sec., averaged

Cold start 42 sec., averaged

4) Position accuracy:

A) Non DGPS (Differential GPS)

Position 5-25 meter CEP without SA

Velocity 0.1 meters/second, without SA

Time 1 microsecond synchronized GPS time

B) EGNOS/WAAS/Beacon

Position < 2.2 meters, horizontal 95% of time

< 5 meters, vertical 95% of time

5) Dynamic Conditions:

Altitude 18,000 meters (60,000 feet) max

Velocity 515 meters / second (700 knots) max

Acceleration 4 G, max

Jerk 20 meters/second, max

1.3.5 USB Interfaces

1) USB interface with user selectable baud rate (4800-Default, 9600, 19200, 38400).

2) NMEA 0183 Version 2.2 ASCII output GGA, GSA, GSV, RMC (option GLL, VTG, ZDA).

3) SiRF binary protocol.

2. Operational characteristics

2.1 Initialization

As soon as the initial self-test is complete, the GR-213U begins the process of satellite acquisition and tracking

automatically. Under normal circumstances, it takes approximately 42 seconds to achieve a position fix, 38

seconds if ephemeris data is known. After a position fix has been calculated, information about valid position,

velocity and time is transmitted over the output channel.

The GR-213U utilizes initial data, such as last stored position, date, time and satellite orbital data, to achieve

maximum acquisition performance. If significant inaccuracy exists in the initial data, or the orbital data is

obsolete, it may take more time to achieve a navigation solution. The GR-213U Auto-locate feature is capable

of automatically determining a navigation solution without intervention from the host system. However,

acquisition performance can be improved as the host system initializes the GR-213U in the following situation:

1) Moving further than 500 kilometers.

2) Failure of data storage due to the inactive internal memory battery.

2.2 Navigation

After the acquisition process is complete, the GR-213U sends valid navigation information over output channels.

These data include:

1) Latitude/longitude/altitude

2) Velocity

3) Date/time

4) Error estimates

5) Satellite and receiver status

3. Hardware interface

3.1 Dimension

3.2 Hardware Connection

1) The GR-213U includes an antenna in a unique style waterproof gadget. With the USB connector, you can

easily access to your notebook PC, or other USB devices.

2) USB connector

The USB A Type is equipped with GR-213U. The function definition is as follows:

Pin Si

nal Name

1+5V

2D+

3D-

4 Ground

4. USB Driver

4.1 System Requirements

IBM, Pentium compatible PC and above.

16 MB memory and above

Windows 98/Me/2000/XP;

VGA Graphic Adapter.

4.2 Installation

1. Copy the ＜GR-213U->English->USB Driver->Win98_2k_XP＞USB-V2.1.0.exe from CD to hard disk.

2. Install USB-V2.1.0.exe.

3. Plug the GR-213U USB connector into the computer, the computer will search plug and play (P&P) device

automatically, and the installation of GR-213U USB Driver is complete.

4.3 Important

Verify the COM port # to start using your own navigating software.

1. Click <Start> menu, select <Settings>, then enter <Control Panel>.

2. After entering <Control Panel>, select <System>.

3. Select <Device Manager>.

4. Find the <Connect port> and check the Virtual COM Port, which was created by the USB driver,

Please note that the Virtual COM Port number might be different from every computer. Before using

navigating software, please confirm the COM Port numbers created by your computer and provided by

your navigation software. Otherwise, the navigating software won’t receive the satellite signal, because of

the un-match COM Port setting.

“#” sign represents the COM port number that being created by USB port. Usually the value will be

COM1 in normal navigation software. So the correct COM port of the navigation software needs to

be the same as the one in PC that created by USB port, and then the navigation is able to receive

correct data.

5. Software Interface

The GR-213U interface protocol is based on the National Marine Electronics Association's NMEA 0183 ASCⅡ

interface specification, which is defined in NMEA 0183, Version 2.2 and the Radio Technical Commission for

Maritime Services (RTCM Recommended Standards For Differential Navstar GPS Service, Version 2.1, RTCM

Special Committee No.104, Type 1,2,9) or WAAS (in USA area) or EGNOS (in European area).

5.1 NMEA Transmitted Messages

The GR-213U supported by SiRF Technology Inc. also outputs data in NMEA-0183 format as defined by the

National Marine Electronics Association (NMEA), Standard.

The default communication parameters for NMEA output are 4800 baud, 8 data bits, stop bit, and no parity.

Table 5-1 NMEA-0183 Output Messages

NMEA Record Description

GPGGA Global positioning system fixed data

GPGLL Geographic position- latitude/longitude

GPGSA GNSS DOP and active satellites

GPGSV GNSS satellites in view

GPRMC Recommended minimum specific GNSS data

GPVTG Course over ground and ground speed

5.1.1 Global Positioning System Fix Data (GGA)

Table 5-2 contains the values for the following example:

$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*18

Table 5-2 GGA Data Format

Name Example Units Description

Message ID $GPGGA GGA protocol header

UTC Time 161229.487 hhmmss.sss

Latitude 3723.2475 ddmm.mmmm

N/S Indicator N N=north or S=south

Longitude 12158.3416 dddmm.mmmm

E/W Indicator W E=east or W=west

Position Fix Indicator 1 See Table 5-3

Satellites Used 07 Range 0 to 20

HDOP 1.0 Horizontal Dilution of Precision

MSL Altitude 9.0 Meters

Units M Meters

Geoid Separation Meters

Units M Meters

Age of Diff. Corr. second Null fields when DGPS is not used

Diff. Ref. Station ID 0000

Checksum *18

<CR> <LF> End of message termination

Table 5-3 Position Fix Indicator

Value Description

0 0 Fix not available or invalid

1 GPS SPS Mode, fix valid

2 Differential GPS, SPS Mode, fix valid

3 GPS PPS Mode, fix valid

5.1.2 Geographic Position with Latitude/Longitude(GLL)

Table 5-4 contains the values for the following example:

$GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C

Table 5-4 GLL Data Format

Name Example Units Description

Message ID $GPGLL GLL protocol header

Latitude 3723.2475 ddmm.mmmm

N/S Indicator N N/S Indicator N N=north or S=south

Longitude 12158.3416 dddmm.mmmm

E/W Indicator W E=east or W=west

UTC Position 161229.487 hhmmss.sss

Status A A=data valid or V=data not valid

Checksum *2C

<CR> <LF> End of message termination

5.1.3 GNSS DOP and Active Satellites (GSA)

Table 5-5 contains the values for the following example:

$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33

Table 5-5 GSA Data Format

Name Example Units Description

Message ID $GPGSA GSA protocol header

Mode 1 A See Table 5-6

Mode 2 3 See Table 5-7

Satellite Used(1) 07 Sv on Channel 1

Satellite Used (1) 02 Sv on Channel 2

…… ….

Satellite Used Sv on Channel 20

PDOP 1.8 Position Dilution of Precision

HDOP 1.0 Horizontal Dilution of Precision

VDOP 1.5 Vertical Dilution of Precision

Checksum *33

<CR> <LF> End of message termination

1. Satellite used in solution.

Table 5-6 Mode 1

Value Description

M Manual—forced to operate in 2D or 3D mode

A2DAutomatic—allowed to automatically switch 2D/3D

Table 5-7 Mode 2

Value Description

1 Fix Not Available

2 2D

3 3D

5.1.4 GNSS Satellites in View (GSV)

Table 5-8 contains the values for the following example:

$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71

$GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41

Table 5-8 GSV Data Format

Name Example Units Description

Message ID $GPGSV GSV protocol header

Number of Messages 2 Range 1 to 3

Message Number 1 Range 1 to 3

Satellites in View 07 Range 1 to 12

Satellite ID 07 Channel 1 (Range 1 to 32)

Elevation 79 degrees Channel 1 (Maximum 90)

Azimuth 048 degrees Channel 1 (True, Range 0 to 359)

SNR (C/No) 42 dBHz Range 0 to 99, null when not tracking

.... ....

Satellite ID 27 Channel 4 (Range 1 to 32)

Elevation 27 degrees Channel 4 (Maximum 90)

Azimuth 138 degrees Channel 4 (True, Range 0 to 359)

SNR (C/No) 42 dBHz Range 0 to 99, null when not tracking

Checksum *71

<CR> <LF> End of message termination

NOTE: Items <4>,<5>,<6> and <7> repeat for each satellite in view to a maximum of four (4) satellites per

sentence. Additional satellites in view information must be sent in subsequent sentences. These fields will be

null if unused.

5.1.5 Recommended Minimum Specific GNSS Data (RMC)

Table 5-9 contains the values for the following example:

$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598, ,*10

Table 5-9 RMC Data Format

Name Example Units Description

Message ID $GPRMC RMC protocol header

UTC Time 161229.487 hhmmss.sss

Status A A=data valid or V=data not valid

Latitude 3723.2475 ddmm.mmmm

N/S Indicator N N=north or S=south

Longitude 12158.3416 dddmm.mmmm

E/W Indicator W E=east or W=west

Speed Over Ground 0.13 knots

Course Over Ground 309.62 degrees True

Date 120598 ddmmyy

Magnetic Variation (1) degrees E=east or W=west

Checksum *10

<CR> <LF> End of message termination

1. SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic

WGS84 directions.

5.1.6 Course Over Ground and Ground Speed (VTG)

Table 5-10 contains the values for the following example:

$GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E

Table 5-10 VTG Data Format

Name Example Units Description

Message ID $GPVTG VTG protocol header

Course 309.62 degrees Measured heading

Reference T True

Course degrees Measured heading

Reference M Magnetic (1)

Speed 0.13 knots Measured horizontal speed

Units N Knots

Speed 0.2 km/hr Measured horizontal speed

Units K Kilometers per hour

Checksum *6E

<CR> <LF> End of message termination

1. SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic

WGS84 directions.

5.1.7 ZDA—SiRF Timing Message

Outputs the time associated with the current 1 PPS pulse. Each message will be output within a few

hundred ms after the 1 PPS pulse is output and will tell the time of the pulse that just occurred.

Table 5-11 contains the values for the following example:

$GPZDA,181813,14,10,2003,00,00*4F

Table 5-11 ZDA Data Format

Name Example Units Description

Message ID $GPZDA ZDA protocol header

UTC Time

181813 Either using valid IONO/UTC or estimated

from default leap seconds

Day 14 01 TO 31

Month 10 01 TO 12

Year 2003 1980 to 2079

Local zone hour 00 knots Offset from UTC (set to 00)

Local zone hour 00 Offset from UTC (set to 00)

Checksum 4F

<CR> <LF> End of message termination

6. Warranty

The GR-213U is warranted to be free from defects in material and functions for one year from the date of

purchase. Any failure of this product within this period under normal conditions will be replaced at no charge to

the customers.

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