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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