Holux gr-213 Guía Del Usuario

 

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3.  After the installation is complete, go to <Device Manager> and select <Ports (COM & LPT)> to verify if a 

virtual COM port <USB to Serial Port> was created.   

 
 

 
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. 

 
 
 

 

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

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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).  

 

 
The GR-213 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 

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

 
Table 5-2 GGA Data Format 

Name 

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