MeiTrack T400G, Руководство пользователя

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MEITRACK T400G TPMS Scheme User Guide
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Note:

A comma (,) is used to separate data characters. The character type is the American Standard Code for
Information Interchange (ASCII) (hexadecimal: 0x2C).

Symbols "<" and ">" will not be present in actual data, only for documentation purpose only.

All multi-byte data complies with the following rule: High bytes are prior to low bytes.

The size of a GPRS data packet is about 160 bytes.
Descriptions about GPRS packets from the tracker are as follows:
Parameter Description Example
@@ / $$ @@: Indicates the GPRS data packet header sent
from the server to the tracker. The header type is
ASCII (hexadecimal: 0x40).
$$: Indicates the GPRS data packet header sent from
the tracker to the server. The header type is ASCII
(hexadecimal: 0x24).
@@ / $$
Data identifier Contains 1 byte. The type is the ASCII, and its value
ranges from 0x41 to 0x7A .
Q
Data length Indicates the length of characters from the first
comma (,) to \r\n. Decimal.
$$< Data identifier >< Data
length >,< IMEI >,< Command type >,< Command
content ><* Checksum >\r\n
25
IMEI Indicates the tracker's IMEI number. The number
type is ASCII. It has 15 digits generally.
353358017784062
Command type Hexadecimal AAA
Event Code Decimal 1
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.
091221102631
Indicates 21 December
2009, 10:26:31 am.