Specifications

GV200 @Track Air Interface Protocol
TRACGV200AN003 – 252 –
4.6. Heartbeat Data +HBD
 +HBD,
Example:
2B 48 42 44 EB 1E 01 0C 01 23 5C 1F 03 43 23 1B 00 07 DC 01 1E 09 20 26 00 0D E2 9C 0D
0A
Parameter Length(byte) Range/Format Default
Message Header 4 +HBD +HBD
Report Mask 1 00 – FF
Length 1
Device Type 1 04
Protocol Version 2 0000 – FFFF
Firmware Version 2 0000 – FFFF
Unique ID 8 IMEI/Device Name
Send Time 7 YYYYMMDDHHMMSS
Count Number 2 0000 – FFFF
Checksum 2 0000 – FFFF
Tail Characters
2
0x0D 0x0A 0x0D 0x0A
 <Report Mask>: It refer to the <+HBD Mask> in AT+GTHRM.
 <Unique ID>: If the Bit 4 of <+HBD Mask> is 0, IMEI of the device as the unique ID of the
device. IMEI is a 15-digit string. In the HEX format message, each 2 digits are encoded into
one byte as an integer.
IMEI 13
57 90 24 68 11 22 0
HEX 0D
39 5A 18 44 0B 16 00
If the Bit 4 of <+HBD Mask> is 1, use the device name as the unique ID of the device. The
device name refer to the <Device Name> in AT+GTCFG. Device name is 8-bytes string, if
the length of the <Device Name> is more than 8 bytes, it will only acquire the first 8 bytes. In
the Hex format message, each byte is encoded into one byte as an integer. If the device name
is less than 8 bytes, the rest of bytes set as 0.
IMEI g v 2 0 0
HEX 67
76 32 30 30 00 00 00
If the mask of <UID> set as 0 in the <+HBD Mask> of AT+GTHRM, the heart beat message will
not report device name or IMEI information. If the mask of <UID> is set as 1, then according to
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