Rikaline 24A User Manual page 16

GPS Receiver Board
C.3 $PNMRX103, NMEA rate control
This message is being sent to enable or to disable the output of an NMEA message and to determine its
output rate. The sequence of the output sequence is determined by the $PNMRX107 message. The
$PNMRX103 message format is shown below. The rate of each message can individually be set. If '0' is
used, the output of the message is skipped (according to the message sequence). The message length is
limited to 80 characters, in the event that the message length would exceed 80 characters it is divided into 2
messages. This message is supported also in a variable length format, where only the necessary fields are
used.
Field
Message ID
Mask ID
Mask value
Mask ID
Checksum
Message terminator
Examples:
$PNMRX103, GSV, 2,GGA, 1,ZDA, 0*xx: GSV is output every 2s,GGA every 1s and ZDA is skipped.
$PNMRX103, GSV, 2, GGA, 1, ZDA, 0,*xx: same as above, but using a fixed length message
$PNMRX103, ALL, 2*xx: all messages are output every 2s.
$PNMRX103, ALL, 0*xx: skips all messages.
C.4 $PNMRX104, LLA navigation initialization
This message enables the receiver to be initialized using LLA data to speed up satellite acquisition. The first
4 values defining the position (if used) must be all present in the message. Otherwise the whole massage is
considered invalid.
Field Format
Message ID $PNMRX104
Latitude Float
N/S Indicator Char
Latitude Float
E/W Indicator Char
Altitude Int
Clock offset Int
Time of week Int
Week number Int
Channel count Int
Checksum *xx
Message <CR> <LF>
terminator
Note: 1// If used, all five components (Lat, N/S, Long E/W, alt) of the LLA position must be provided.
Otherwise, the message is declared invalid as a whole
2// Modifying the LLA coordinates triggers a software system reset after successful execution of the
message.
Rikaline International Corp.
Tel: ++886 2 2370 4688 Fax: ++886 2 2370 4686 E-Mail:
GPS-24 / 24A Operating Manual
Format Min
chars
$PNMRX103 8
Int 3
Int 1
Int 2
*xx (0) 3
<CR> <LF> 2
Min Max
chars char
s
8 8
1,2.1 3,2.4
1 1
1,2.1 3,2.4
1 1
(-) 1 (-) 6
(0) 1 6
1 6
1 4
1 2
(0) 3 3
2 2
10F, 64, Kang-Din Road, Taipei 108, Taiwan
Max Notes
chars
8 PNMRX103 protocol header.
3 Mask identifier: possibilities are
GGA / GLL / GSA / GSV
RMC / VTG / ZDA
ALL (applies to all messages)
1 Output rate in seconds (0=paused)
2 Mask identifier.
3 2 digits.
2 ASCII 13, ASCII 10.
Notes
PNMRX104 protocol header. (Under dev.)
Degrees * 100 + minutes. (Under dev.)
N=north or S=south. (Under dev.)
Degrees * 100 + minutes. (Under dev.)
E=east or W=west. (Under dev.)
Altitude above MSL, in meters.
Clock offset of GPS receiver. These changes the clock
bias stored in the settings, not the actual clock bias used
by the system. A cold start is necessary, in order to use
this value.
Offset from start of week in seconds. (Under dev.)
GPS week number.
Maximum number of TM to be used. Min12, max 16.
2 digits.
ASCII 13, ASCII 10.
Specifications subject to change without prior notice
info@rikaline.com.tw
Rikaline
Web: www.rikaline.com.tw
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