MEITRACK T622 GPRS Protocol
Copyright © 2017 Meitrack Group All rights reserved. - 6 -
Descriptions about AAA format commands are as follows:
Parameter
Description
Example
Event code
Decimal
For details, see section 1.5 "Event Code."
1
Event code 1: SOS Pressed
Latitude
(-)yy.dddddd
Unit: degree
Decimal
When a minus
(-)
exists,
the tracker is in the
southern hemisphere. When no minus (-)
exists, the
tracker is in the northern hemisphere.
yy
indicates the degree.
dddddd
indicates the decimal part.
22.756325
(indicates
22.756325°N)
-23.256438
(indicates
23.256438°S)
Longitude
(-)xxx.dddddd
Unit: degree
Decimal
When a minus
(-)
exists, the tracker is in the western
hemisphere. When no minus (-)
exists, the tracker is
in the eastern hemisphere.
xxx
indicates the degree.
dddddd
indicates the decimal part.
114.752146
(indicates
114.752146°E)
-114.821453
(indicates
114.821453°W)
Date and time
yymmddHHMMSS
yy
indicates year.
mm
indicates month.
dd
indicates day.
HH
indicates hour.
MM
indicates minute.
SS
indicates second.
Decimal
091221102631
Indicates
21
December
2009, 10:26:31 am.
Positioning status
Indicates the GPS signal status.
A
= Valid
V
= Invalid
A
The GPS is valid.
Number of satellites
Indicates the number of received GPS satellites.
Decimal
5
Five GPS satellites are
received.
GSM signal strength
Value: 0–31
Decimal
12
The signal strength is 12.
Speed
Decimal
Unit: km/h
Value range: 0–999
58
The speed is 58 km/h.
Direction
Indicates the driving direction. The unit is degree.
When the value is
0
, the direction is due north. The
value ranges from 0 to 359.
Decimal
45: indicates that the
location is at northeast.
90: indicates that the
location is at due east.