Manual

GE863-GPS Software User Guide

1vv0300724 Rev. 3 - 05/07/07

5.7.3 Message 103 – Query / Rate Control

This command is used to control the output of standard NMEA messages GGA, GLL, GSA, GSV,

RMC, and VTG. Using this command message, standard NMEA messages may be polled once, or

setup for periodic output. Checksums may also be enabled or disabled depending on the needs of the

receiving program. NMEA message settings are saved in battery-backed memory for each entry when

the message is accepted.

The command has the following syntax:

$PSRF103,<Msg>,<Mode>,<Rate>,<Checksum Enable>*<checksum><CR><LF>

1. Query the GGA message with checksum enabled

$PSRF103,00,01,00,01*25

2. Enable VTG message for a 1 Hz constant output with checksum enabled

$PSRF103,05,00,01,01*20

3. Disable VTG message

$PSRF103,05,00,00,01*21

4. Enable VTG and GLL sentences

$PSRF103,05,00,01,01*20<CR><LF>

$PSRF103,01,00,01,01*24<CR><LF>

The following table describes the command fields:

Name Example Unit Description

Message ID $PSRF103 PSRF103 protocol header

Msg 00 See next table

Mode 01 0=Set rate, 1=Query

Rate 00 sec Output off=0, max =255

CksumEnable 01 0=Disable Checksum, 1=Enable

Checksum

Checksum *25

<CR><LF> End of message termination

The following table describes the available messages:

Value Description

0 GGA

1 GLL

2 GSA

3 GSV

4 RMC

5 VTG