Dagama Sg-288 User manual

SG-268 Manual V1.0

USER’S GUIDE

SG-28

SG-28SG-28

SG-288

LCD

LCDLCD

LCD Display

DisplayDisplay

Display Bluetooth

BluetoothBluetooth

Bluetooth GPS

GPSGPS

GPS Receiver

ReceiverReceiver

Receiver

V1.1

Dagama

DagamaDagama

Dagama Technology Inc.

Room 1159, No.66, miaojing Road, Minhang district, Shanghai, PRC

E-mail: service@dagamagps.com http://www.dagamagps.com

Free Service Hotline:400-800-1322(only for China mainland)

SG-288 Manual V1.1

Contents

1. Introduction

………………………………………………………..…………. 2

1.1 Overview ……………………………………………………………………2

1.2 Features ………………………………………………………………..… 2

1.3 Electrical Characteristics ………………………………………………. 3

2. Hardware

……………………………………………………………………… 4

2.1 Dimension …………………………………………………………………. 4

2.2 Accessories …………………………………………………………..……… 4

2.3 Description …………………………………………………………...…..… 5

3. Operation

……………………………………………………………………… 7

3.1 Getting Start …………………………………………………………………. 7

3.2 GPS Viewer for Testing ………………………..…………………………… 8

3.3 Function ……………………………………………………………………… 9

3.4 Navigation …………………………………………………………………….. 9

4. Warranty

……………………………………………………….…………… 9

Appendix: Software Specification

…………………………………….. 10

Appendix:Time Zone Table

………………………………………………… 19

SG-288 Manual V1.1

1. Introduction

1.1 Overview

The Dagama

DagamaDagama

Dagama SG-288

LCD Display Bluetooth GPS Receiver

is a total solution GPS receiver with

Bluetooth, UART interface and built-in rechargeable battery for high sensitivity to tracking signal.

The SG-288 receiver incorporates a wireless Bluetooth radio module, a high sensitivity, high

performance SiRF StarⅢchipset, and a rechargeable battery in a compact design. The SiRF

StarⅢchipset is with extremely high sensitivity for GPS signal acquisition and tracking. This

Bluetooth GPS receiver allows you to receive GPS data on mobile hand-held devices. By sending

the GPS data wirelessly, you may place this receiver on a position with best signal reception without

the constraint of annoying wires. The receiver is equipped with a portable, rechargeable, with

removable battery, just like a mobile phone. The only requirement is your corresponding hand-held

device is also with the Bluetooth connection capability. The receiver is very suitable for broad

applications such as vehicle navigation, mapping, surveying, security, agriculture, etc. Only a clear

view of sky and a battery power are necessary to the unit. With its low power consumption, the

receiver tracks up to 20 satellites at a time while offering fast time-to-first-fix, re-acquires satellite

signals less than 1 second (average) and updates position data every second.

1.2 Features

The SG-288 provides a host of features that make it easy for integration and use.

1. With SiRF StarⅢhigh sensitivity chipset.

2. High sensitivity and high performance receiver tracks up to 20 satellites.

3. High speed signal acquisition using 200,000 time/frequency search channels.

4. Built-in WAAS/EGNOS demodulator without additional hardware.

5. With the highly sensitive software to get the fast acquisition and reacquisition in the urban,

canyon and foliage environments.

6. Equipped with 1050 mAh Li-ion rechargeable battery for long operating hours.

7. Over temperature protection for the battery.

8. Compatible with Bluetooth devices with Serial Port Profile (SPP).

9. Built-in high gain antenna.

10. Three LEDs show Bluetooth, GPS, and battery status.

11. LCD Display shows time, longitude, latitude, elevation, etc.

12. Supports standard NMEA-0183 data protocol and SiRF binary code at 19200 baudrate.

13. Built-in rechargeable battery for memory and RTC backup and for fast TTFF.

14. Flash-based program memory, new software revisions upgradeable through serial interface.

15. Compact and sleek design ideal for portable applications.

SG-288 Manual V1.1

1.3 Electrical Characteristics

General Frequency L1, 1575.42 MHz

C/A code 1.023 MHz chip rate

Channels 20 channels all in view tracking

Antenna internal

Sensitivity

Tracking -159 dBm typical

AccuracyPosition < 10 meters, 2D RMS

< 7 meters 2D RMS, WAAS corrected

1-5 meters, DGPS corrected

Time 1 microsecond synchronized to GPS time

Datum Default WGS-84

Acquisition Rate (Open Sky)

Hot start 1 sec, average

Warm start 38 sec, average

Cold start 42 sec, average

Reacquisition 0.1 sec, average

Dynamic Conditions

Protocol message NMEA-0183

Default NMEA

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

Velocity < 515 meters/sec (1,000 knots)

Acceleration < 4 G

Jerk 20 meters/sec max

GPS protocol GGA, GSA, GSV, RMC, 19200 baudrate, (GLL, VTG,

and ZDA optional)

8 bits data, 1 stop bit, no parity.

Bluetooth Characteristics

BT Compliant Version1.1

RF Tx Power Class 2 (4 dBm max)

Receiver sensitivity -80 dBm with BER<0.1%

Communication distance 10 meter typically

Communication profile Serial Port Profile (SPP)

Power Consumption

Main power input 5.0 ± 5% VDC input

Operation Current 65 mA average in normal mode

SG-288 Manual V1.1

Battery Source Rechargeable and removable 1050 mAh Lithium-ion

battery with 5V DC input charging circuit

Charging time Fully charged 2.5 hours typical

Operation time 15 hours after fully charged in continuous tracking mode

Environmental Characteristics

Operating temperature range -10

C to +60

Storage temperature range -20

C to +70

Charging temperature range 0

C to +45

Operating humidity：5% to 95%, no condensing

Dimension 83 mm (L) x 45.2 mm (W) x 20.5 mm (H)

Weight < 55 g (Battery not included)

2. Hardware

2.1 Dimension

The receiver enclosure is with the dimension: 83 mm (L) x 45.2 mm (W) x 20.5 mm (H)

2.2 Accessories

1, A Lithium-ion 1050 mAh rechargeable battery.

2, A vehicle lighter adapter assembly for battery recharge.

3, A household power adaptor assembly for battery recharge.

4, A USB cable assembly with “A” plug to mini USB plug.

5, User manual and CD.

SG-288 Manual V1.1

2.3 Description

1, Body of the Bluetooth GPS unit is as shown in the figure.

There are three LED windows on the front cover to indicate the GPS, Bluetooth and

battery status. One LCD display panel on the front cover shows time, longitude, latitude,

height, speed, battery status, and satellite signal status. Detailed LED and LCD

indications are described in next paragraph. The battery on/off switch is located on

broadside of the body. The mini USB port for charging battery is on the down side of the

body.

2, LED status

Remark: Battery charging suspended (protection when charge timer over or battery overheat)

Unplug the power plug and wait for a moment to resume charging.

SG-288 Manual V1.1

3, LCD Indication

The LCD display panel shows the following message:

4, Bluetooth/Backlight usage

(The default of Bluetooth/Backlight is ON.)

Under normal operation status, press button “A” for 1 second and then release to

turn off/on Backlight.

Under normal operation status, press button “B” for 1 second and then release to

turn off/on Bluetooth.

5, Setup

1. Press button “A” for 2 seconds then release to enter into setup menu.

2. Press “Select” for 1 second to increase the parameter figure.

3. Press “Next” for 1 second to select different parameters.

4. Afterfinishing setup, press “Exit” for 1 second to back to operation status.





Whenever setting up, the power of the device must be turned off then on again to

reactivate the signal.





Please refer to Appendix: Time Zone Table for time zone adjustment.

SG-288 Manual V1.1

3. Operation

3.1

Getting Start

Step 1: Battery Installation

(a) Slide the power switch to “OFF” position.

(b) Press the “PUSH” button then slide the bottom cover off.

(d) Slide the bottom cover back to locked condition.

Step 2: Charge

Please charge the battery to full capacity when first time to use. Connect the attached adaptor cord to

the mini USB jack, as shown in the following figure.

The battery indication is with dual-color LEDs. The green LED will be on until charge completes.

The LED indication for the battery status is described in the following.

Battery low ----------------------------------------------------------------- Red LED flashing

Battery in charging -------------------------------------------------------- Green LED steady on

Battery charging suspended (protection when

charge timer over or battery overheat) ----------------- Green LED flashing

Charge completes or battery in normal capacity ---------------------- both LEDs off

SG-288 Manual V1.1

Step 3: GPS acquisition

Turn the power switch “on.” The slide switch is on the broadside of the body. Once the power is

turned on, both the Bluetooth and GPS indication LEDs start to flash.

Take the Bluetooth GPS to places with clear view of the sky. The Red LEDindicates the status.

(a) LED steady on when power is connected and for the initial acquisition process;

(b) LED flashes at 1 second on and 1 second off when the receiver outputs position fix data.

Step 4: Wireless Link

Turn on the host device, a PDA or a NB with Bluetooth function. Then execute Bluetooth manager

program to perform “search” and “pair” procedures. The default PIN code is “0000” for host devices

to access this BT GPS unit (in paired mode).

The Blue LED indicates following Bluetooth radio status.

(a) LED flashes at 3 seconds interval for standby mode;

(b) LED flashes at 0.2 second interval for pairable mode;

3.2 GPS Viewer for Testing

Install a GPS Viewer program to host device. You may check the status of the GPS receiver

whenever you like to. Following are standard buttons and operation steps.

(a) Execute the Viewer program. Press the “Com Port:” button to set “Com Port” for this data link

and the “Baudrate” to any one of 2400, 4800, 9600, 19200, 38400…

(b) Click “Start” to receive data. Usually a window shows the NMEA format data stream while

another window shows tracked satellites signal quality.

(c)

Once the link is successful, click “Stop” button to stop the program. However, you may click, for

example, the “Cold Start” button to perform “cold start” testing.

SG-288 Manual V1.1

3.3 Function

As soon as the power on, the SG-288 Bluetooth GPS receiver begins the process of satellite acquisition,

tracking, and Bluetooth radio connection. Under normal circumstances, it takes around 42 seconds

(average) to achieve a position fix at the first time. After a position fix has been calculated,

information about valid position, velocity, and time is transmitted over the output channel. The SG-

288 Bluetooth GPS receiver 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.

3.4 Navigation

After the acquisition process is complete, the SG-288 Bluetooth GPS receiver 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

4. Warranty

The GPS smart receiver 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. The repaired or replaced unit will be covered by the balance of

the time remaining on the customer's original limited warranty.

What the warranty does not cover:

Any product on which the serial number label has been removed, defaced, or modified.

Damage, deterioration or malfunction resulting from accident, misuse, neglect, fire, water,

lightning, or other acts of nature, unauthorized product modification, or failure to follow

instructions supplied with the product.

3. Repair or attempted to repair by anyone not authorized by Dagama

DagamaDagama

Dagama.

4. Use of supplies or parts not meeting Dagama

DagamaDagama

Dagama’s specifications.

SG-288 Manual V1.1

Appendix: Software Specifications

NMEA Protocol

The SG-288 interface protocol is based on the National Marine Electronics Association (NMEA)

interface specification, namely, the NMEA 0183 standard. The SG-288 is capable of supporting

the following NMEA message formats specifically developed and defined by SiRF.

General NMEA Format

The general NMEA format consists of anASCII string commencing with a ‘$’character and

terminating with a <CR><LF> sequence. NMEA standard messages commence with ‘GP’ then a

3-letter message identifier. The message header is followed by a comma delimited list of fields

optionally terminated with a checksum consisting of an asterix ‘*’and a 2 digit hex value

representing the checksum. There is no comma preceding the checksum field. When present,

the checksum is calculated as a bitwise exclusive of the characters between the ‘$’ and ‘*’. As an

ASCII representation, the number of digits in each number will vary depending on the number and

precision, hence the record length will vary. Certain fields may be omitted if they are not used, in

which case the field position is reserved using commas to ensure correct interpretation of

subsequent fields.

NMEA Message Prefix Format Direction

$GPGGA Time, position and fix type data. Out

$GPGLL Latitude, longitude, time of position fix and status. Out

$GPGSA GNSS DOP and active satellites Out

$GPGSV Satellites in view. Out

$GPMSS Radio beacon signal-to-noise ratio, signal strength,

frequency, etc. Out

$GPRMC Recommended minimum specific GNSS data. Out

$GPVTG Speed and course over ground. Out

$GPZDA Date and time. Out

SG-288 Manual V1.1

$GPGGA

This message transfers global positioning system fix data. Following is an example.

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

The $GPGGA message structure is shown below:

(1)

Only apply to NMEA version 2.3 (and later) in this NMEA message description.

(2) SiRF does not support geoid corrections. Values are WGS84 ellipsoid heights.

Field Example Unit Notes

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 Indictor 1

0: Fix not available or invalid.

1: GPS SPS mode, fix valid.

2: Differ. GPS, SPS mode, fix valid

3-5: Not supported.

Dead Reckoning Mode, fix valid.

(1)

Satellites Used 07 Number of satellites used to calculate fix.

Range

12.

HDOP 1.0 Horizontal Dilution of Precision.

MSL Altitude

(2)

9.0 Meter Altitude above mean seal level.

Units M Meter M stands for “meters”.

Geoid Separation

(2)

Meter Separation from Geoids can be blank.

Units Meter M stands for “meters”.

Age of Diff. Corr. Second Age in seconds. Blank (Null) fields when

DGPS

not

used.

Diff Ref. Station ID 0000

Checksum *18

<CR> <LF> Message terminator.

SG-288 Manual V1.1

$GPGLL

This message transfers geographic position, latitude, longitude, and time. Following is an

example.

$GPGLL,3723.2475,N,12158.3416,W,161229.487,A,A*41

The $GPGLL message structure is shown below:

Field Example Unit Notes

Message ID $GPGLL GLL protocol header.

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.

UTC Time 161229.487 hhmmss.sss

Status A A: Data valid or V:Data invalid.

Mode A A=Autonomous, D=DGPS, E=DR

(Only present in NMEA version 3.00).

Checksum *41

<CR><LF> Message terminator.

SG-288 Manual V1.1

$GPGSA

This message transfers DOP and active satellites information. Following is an example.

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

The $GPGSAmessage structure is shown below:

(1) Satellites used in solution.

Field Example Unit Notes

Message ID $GPGSA GSA protocol header.

Mode A M: Manual, forced to operate in selected 2D

or 3D mode.

A: Automatic switching between modes.

Mode 3

Fix not available.

2D position fix.

3D position fix.

Satellites Used

(1)

07 SV on channel 1.

Satellites Used

(1)

02 SV on channel 2.

… ..

Satellites Used

(1)

SV on channel 12.

PDOP 1.8

HDOP 1.0

VDOP 1.5

Checksum *33

<CR> <LF> Message terminator.

SG-288 Manual V1.1

$GPGSV

This message transfers information about satellites in view. The $GPGSV message structure is

shown below. Each record contains the information for up to 4 channels, allowing up to 12

satellites in view. In the final record of the sequence the unused channel fields are left blank with

commas to indicate that a field has been omitted. Following is an 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

The $GPGSV message structure is shown below:

(1) Depending on the number of satellites tracked multiple messages of GSV data may be required.

Field Example Unit Notes

Message ID $GPGSV GSA protocol header.

Number of messages

(1)

2 Number of messages, maximum 3.

Message number 1 Sequence number, range 1 to 3.

Satellites in view 07 Number of satellites currently in view.

Satellite ID 07 Channel 1, ID range 1 to 32.

Elevation 79 degree Elevation of satellite, maximum 90.

Azimuth 048 degree Azimuth of satellite, range 0 to 359.

SNR (C/N

) 42 dBHz Range 0 to 99, null when not tracking.

Satellite ID 02 Channel 2, ID range 1 to 32.

Elevation 51 degree Elevation of satellite, maximum 90.

Azimuth 062 degree Azimuth of satellite, range 0 to 359.

SNR (C/N

) 43 dBHz Range 0 to 99, null when not tracking.

Satellite ID 26 Channel 3, ID range 1 to 32.

Elevation 36 degree Elevation of satellite, maximum 90.

Azimuth 256 degree Azimuth of satellite, range 0 to 359.

SNR (C/N

) 42 dBHz Range 0 to 99, null when not tracking.

Satellite ID 27 Channel 4, ID range 1 to 32.

Elevation 27 degree Elevation of satellite, maximum 90.

Azimuth 138 degree Azimuth of satellite, range 0 to 359.

SNR (C/N

) 42 dBHz Range 0 to 99, null when not tracking.

Checksum *71

<CR> <LF> Message terminator.

SG-288 Manual V1.1

$GPMSS

This message transfers information about radio beacon signal-to-noise ratio, signal strength,

frequency, etc. Following is an example.

$GPMSS,55,27,318.0,100,1,*57

The $GPMSS message format is shown below.

(1)

Fields marked in italic red apply only to NMEA version 2.3 (and later) in this NMEA message description.

Field Example Unit Notes

Message ID $GPMSS MSS protocol header.

Signal Strength 55 dB SS of tracked frequency.

Signal-to-Noise Ratio 27 dB SNR of tracked frequency.

Beacon Frequency 318.0 kHz Currently tracked frequency.

Beacon Bit Rate 100 Bits per second.

Channel Number

(1)

1The channel of the beacon being used if a

multi-channel

beacon

receiver

used

Checksum *57

<CR> <LF> Message terminator.

SG-288 Manual V1.1

$GPRMC

This message transfers recommended minimum specific GNSS data. Following is an example.

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

The $GPRMC message format is shown below.

(1) SiRF does not support magnetic declination. All “course over ground” data are geodetic WGS84 directions.

(2)

Fields marked in italic red apply only to NMEA version 2.3 (and later) in this NMEA message description.

Field Example Unit Notes

Message ID $GPRMC RMC protocol header.

UTC Time 161229.487 hhmmss.sss

Status

Data

valid

Data

invalid.

Latitude 3723.2475 ddmm.mmmm

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

Longitude 12158.3416 ddmm.mmmm

E/W indicator W E=east or W=west.

Speed over ground 0.13 knot Speed over ground

Course over ground 309.62 degree Course over ground

Date 120598 ddmmyy, current date.

Magnetic variation

(1)

degree Not used.

Mode

(2)

A A=Autonomous, D=DGPS, E=DR.

Checksum *10

<CR> <LF> Message terminator.

SG-288 Manual V1.1

$GPVTG

This message transfers velocity, course over ground, and ground speed. Following is an example.

$GPVTG,309.62,T, ,M,0.13,N,0.2,K,A*23

The $GPVTG message format is shown below.

(1) SiRF does not support magnetic declination. All “course over ground” data are geodetic WGS84 directions.

(2)

Fields marked in italic red apply only to NMEA version 2.3 (and later) in this NMEA message description.

Field Example Unit Notes

Message ID $GPVTG VTG protocol header.

Course (true) 309.62 degree Measured heading

Reference T T = true heading

Course (magnetic) degree Measured heading

Reference

(1)

M M = magnetic heading

(1)

Speed 0.13 knot Speed in knots

Units N N = knots

Speed 0.2 km/hr Speed

Units K K = km/hour.

Mode

(2)

A A=Autonomous, D=DGPS, E=DR.

Checksum *23

<CR> <LF> Message terminator.

SG-288 Manual V1.1

$GPZDA

This message transfers UTC Time and Date. Following is an example.

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

The $GPZDA message format is shown below.

Field Example Unit Notes

Message ID $GPZDA ZDA protocol header.

UTC Time 181813 Either using valid IONO/UTC or estimated

from default leap seconds.

UTC Day 14 01 to 31, day of month.

UTC Month 10 01 to 12.

UTC Year 2003 1980 to 2079.

Local zone hours 00 Offset from UTC (set to 00).

Local zone minutes 00 Offset from UTC (set to 00).

Checksum *4F

<CR> <LF> Message terminator.

SG-288 Manual V1.1

Appendix:Time Zone Table

Time Zone Name

Coordinated

Universal Time

Daylight Saving

Time

Eniwetok, Kwajalein -12

Midway Island, Samoa -11 .

Hawaii -10 .

Alaska -9 -8

Pacific Time (US and Canada); Tajuana -8 -7

Mountain Time (US and Canada), Chihuahua, La Paz,

Mazatlan, Arizona -7 -6

Central Time (US and Canada), Saskatchewan, Guadalajara,

Mexico City, Monterrey, Central America -6 -5

Eastern Time (US and Canada), Indiana (East), Bogota,

Lima, Quito -5 -4

AtlanticTime (Canada), Caracas, La Paz, Santiago -4

Newfoundland -3.5 -2.5

Brasilia, Buenos Aires, Georgetown, Greenland -3 .

Mid-Atlantic -2

Azores, Cape Verde Islands -1

Greenwich Mean Time: Dublin, Edinburgh, Lisbon, London,

Casablanca, Monrovia +0 +1

Amsterdam, Belgrade, Bratislava, Budapest, Ljubljana,

Prague, Sarajevo, Skopje, Warsaw, Zagreb, Brussels,

Copenhagen, Madrid, Paris, Berlin, Bern, Rome, Stockholm,

Vienna, West Central Africa

+1 +2

Athens, Istanbul, Minsk +2 +3

Bucharest, Cairo, Pretoria, Jerusalem, Harare, Pretoria +2 +3

Helsinki, Riga, Israel, Kyiv, Sofia, Tallinn, Vilnius +2 +3

Baghdad, Kuwait, Riyadh, Nairobi +3 +4

Moscow, St. Petersburg, Volgograd +3 +4

Tehran +3.5 +4.5

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