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RoyalTek REB-3000 User Manual

Page 27

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RoyalTek RGM-3000/REB-3000
GPS Module Operational Manual)

22

Switch To NMEA – Message I.D. 129

Table 20 contains the input values for the

following example:

Request the following NMEA data at 9600

baud:

GGA – ON at 1 sec , GLL – 0sec , GSA – ON

at 5 sec GSV – ON at 5 sec , RMC – 0 sec ,

VTG – 0 sec

Example:

A0A20018 – Start Sequence and Payload

Length

8102010100010501050100010001000100010

001000112C0 – Payload

016AB0B3 – Message Checksum and End

Sequence

Table 22

Switch To NMEA Protocol

Binary(Hex)

Name

Bytes

Scale Example

Units

Description

Message ID

1

81

ASCII 129

Mode 1

02

GGA Message

1

1

01

1/s

Checksum

2

1

01

GLL Message

1

00

1/s

Checksum 1

01

GSA Message

1

05

1/s

Checksum 1

01

GSV Message

1

05

1/s

Checksum 1

01

RMC Message

1

00

1/s

Checksum 1

01

VTG Message

1

00

1/s

Checksum 1

01

MSS Message

1

00

Recommended value

Checksum 1

01

Recommended

value

Unused Field

1

00

Recommended value

Unused Field

1

01

Recommended value

Unused Field

1

00

Recommended value

Unused Field

1

01

Recommended value

Unused Field

1

00

Recommended value

Unused Field

1

01

Recommended value

Baud

Rate 1

12C0

38400,19200,9600,4800,2400

Payload Length: 24bytes

(1)

A value of 0x00 implies NOT to send

message, otherwise data is sent at 1

message every X seconds requested

(i.e., to request a message to be sent

every 5 seconds, request the message

using a value of 0x05.)Maximum rate is

1/255s.

(2)

A value of 0x00 implies the checksum

is NOT calculated OR transmitted with

the message (not recommended ) .A

value of 0x01 will have a checksum

calculated and transmitted as part of the

message (recommended).

Set Almanac- Message I.D. 130

This command enables the user to upload

an almanac to the Evaluation Unit

Note – This feature is not documented in

this manual. For information on

implementation contact SiRF Technology

Inc.

Software Version – Message I.D. 132

Table 21 contains the input values for the

following example:Poll the software

version

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