HDOP
VDOP
Status (12bytes)
RTC (14bytes)
Voltage(8bytes)
ADC 8bytes,the ADC value.
LACCI Location information elements
Temperature Temperature information
Serial ID 4bytes, sign every GPRS data, the range is [0001-9999], then circle it
again from 0001 to 9999.
Checksum 2Bytes, means CRC check of all the data ahead, CRC-16 modbus
(Polynomial = 0xA001，initialize data is 0xffff) checksum, not including its
own byte and end characters. For example: (hex format）
24 24 41 39 33 35 33 33 35 38 30 31 39 34 37 34 31 30 30 7C 41 41 24
47 50 52 4D 43 2C 30 34 33 30 30 32 2E 30 30 30 2C 41 2C 32 32 33 32
2E 34 32 38 39 2C 4E 2C 31 31 34 30 33 2E 37 33 34 33 2C 45 2C 30
2E 30 30 2C 2C 32 34 30 38 30 39 2C 2C 2A 31 44 7C 30 32 2E 33 7C
30 32 2E 30 7C 30 31 2E 30 7C 31 31 30 30 31 31 31 31 30 30 30 30 7C
32 30 30 39 30 38 32 34 30 34 33 30 30 33 7C 31 34 32 30 31 33 30 30
7C 30 30 30 30 30 30 30 30 7C 32 35 33 33 37 36 32 31 7C 30 30 30 30
7C 32 32 38 30 7C 39 36 46 37 0D 0A
0x96F7(39 36 46 37) = CRC-16 modbus (24 24 41 39 33 35 33 33 35 38
30 31 39 34 37 34 31 30 30 7C 41 41 24 47 50 52 4D 43 2C 30 34 33 30
30 32 2E 30 30 30 2C 41 2C 32 32 33 32 2E 34 32 38 39 2C 4E 2C 31 31
34 30 33 2E 37 33 34 33 2C 45 2C 30 2E 30 30 2C 2C 32 34 30 38 30 39
2C 2C 2A 31 44 7C 30 32 2E 33 7C 30 32 2E 30 7C 30 31 2E 30 7C 31
31 30 30 31 31 31 31 30 30 30 30 7C 32 30 30 39 30 38 32 34 30 34 33
30 30 33 7C 31 34 32 30 31 33 30 30 7C 30 30 30 30 30 30 30 30 7C 32
35 33 33 37 36 32 31 7C 30 30 30 30 7C 32 32 38 30 7C).
\r\n 2Bytes, end char (hex format is 0x0d,0x0a).
• Alarm type
o 0x01 SOS button is pressed
o 0x49 Button A is pressed
o 0x09 Auto Shutdown Alarm
o 0x10 Low battery Alarm
o 0x11 Over Speed Alarm
o 0x13 Recover From Over Speed
o 0x30 Parking Alarm
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