Read Positioning Data（Rmc - Ebyte Wireless Modem User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.
for other check codes.
5.2.5 Read positioning data（RMC）
Command frame: 01 03 00 05 00 23 14 12
Address
0x01
Response frame:
Address
0x01
Positioning data (RMC) parsing
The 70-byte data returned by reading the positioning data (RMC) conforms to the NMEA0183 protocol, and the
ASCII display is as follows:
$GNRMC,083429.00,A,3046.26769,N,10356.04948,E,000.00,089.80,190422*21
Field Symbol
1
2 GNRMC
3 hhmmss.ss
4
5 ddmm.mmmmm
6
7 ddmm.mmmmm
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Function code Register start address
0x03
Function code
0x03
Meaning
$
UTC time
Positioning
A
status
Latitude
Latitude
a
direction
Longitude
Number of
registers
0x00 0x05 0x00 0x23
Data length
0x46 70byte data
Value Range
hhmmss.ss
A/V
ddmm.mmmmm 3640.46260
N/S
ddmm.mmmmm 3640.46260
E108-D01 User Manual
CRC check
0x14 0x12
data CRC check
2byte check
Example Remarks
RMC protocol header,
GNRMC means joint
positioning
Plus 8h for Beijing
072905.00 East Eighth District
needs
A-valid，V-invalid
Convert to degrees
when calculating: 36
degrees + 40.46260
minutes.
40.46260/60=0.67438
degree, so the value
3640.46260 should be
36.67438 degree
N-North latitude，
S-South latitude
Convert to degrees
when calculating: 36
degrees + 40.46260
minutes.
40.46260/60=0.67438
degree, so the value
13