GALILEOSKY GLONASS/GPS Satellite v4.0 (0223) User’s manual
GalileoSky Ltd.
Page 83
The server can send commands to the device. After command receiving and its successful execution, the
terminal sends a packet with text reply.
Structure of a packet with a command:
Field
Size
Header 0x01
1 byte
Packet length
2 bytes
Tag 0x03
1 byte
IMEI
15 bytes
Tag 0x04
1 byte
Device identifier
2 bytes
Tag 0xE0
1 byte
Command number, random number selected by the server
4 bytes
Tag 0xE1
1 byte
Command line length
1 byte
Command text in ASCII
Checksum. Calculated for the whole packet beginning with the header.
2 bytes
Respond’s structure is analogous to the command’s packet, but reply text is sent instead of command text.