EB-N701 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C.
http://www.emt.com.tw
22
5.7 $GPRMC
This message transfers recommended minimum specific GNSS data. The $GPRMC message format
is shown below.
Field Format
Min
chars
Max
chars
Notes
Message ID
$GPRMC
6
6
RMC protocol header.
UTC Time
hhmmss.sss
1,2,2.1
2,2,2.3
Fix time to 1ms accuracy.
Status
char
1
1
A Data Valid.
V Data invalid.
Latitude Float 1,2.1
3,2.4
Degrees * 100 + minutes.
N/S Indicator
Char
1
1
N=north or S=south.
Longitude Float 1,2.1
3,2.4
Degrees * 100 + minutes.
E/W indicator
Char
1
1
E=east or W=west.
Speed over
ground
Float
1,1
5.3
Speed over ground in knots.
Course over
ground
Float
1.1
3.2
Course over ground in degrees.
Date ddmmyy
2,2,2
2,2,2
Current
date.
Magnetic variation Blank
(0)
(0)
Not used.
E/W indicator
Blank
(0)
(0)
Not used.
Mode
Char
1
1
A Autonomous
Checksum
*xx
(0) 3
3
2 digits.
Message
terminator
<CR> <LF>
2
2
ASCII 13, ASCII 10.
5.8 $GPVTG
This message transfers Velocity, course over ground, and ground speed. The $GPVTG message
format is shown below.
Field Format
Min
chars
Max
chars
Notes
Message ID
$GPVTG
6
6
VTG protocol header.
Course (true)
Float
1.1
3.2
Measured heading in degrees.
Reference
Char
1
1
T = true heading.
Course
(magnetic)
Float
1.1
3.2
Measured heading (blank).
Reference
Char
1
1
M = magnetic heading.
Speed
Float
1.1
4.2
Speed in knots.
Units
Char
1
1
N = knots.
Speed Float
1.1
4.2
Speed
units
Char
1
1
K = Km/h.
Mode
Char
1
1
A Autonomous
Checksum
*xx (0)
3
3 2
digits.
Message
terminator
<CR>
<LF>
2
2
ASCII 13, ASCII 10.
