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GMT00 @Track Air Interface Protocol

TRACGMT100AN001 – 45 –

3.2.16. Harsh Behavior Monitoring

The command AT+GTHBM is used to monitor the harsh behavior of drive with GPS. Two harsh

behaviors are monitored, the harsh braking and the harsh acceleration. According the speed read

from GPS, 3 levels of speed are defined including high speed, medium speed and low speed. For

each speed level, 2 thresholds of speed change are defined to determine the harsh braking and

harsh acceleration. If the change of speed within 5 seconds are greater than the corresponding

threshold, the device will report +RESP:GTHBM message to the backend server to indicate the

harsh behavior. The same harsh behavior within 30 seconds only reports once. For this function to

work, the <GPS on Need> in AT+GTCFG must set to 0.

 AT+GTHBM=

Example:

AT+GTHBM=gmt100,1,,,100,21,6,,60,21,6,,,21,15,,1,1,8,3,,,,,000F$

Parameter

Length(byte)

Range/Format

Default

Password

4 – 6

'0' – '9' 'a' – 'z' 'A' – 'Z'

gmt100

Enable

0|1

Reserved

High Speed

<=3

100 – 400km/h

100

∆Vhb

<=3

0 – 100km/h

∆Vha

<=3

0 – 100km/h

Reserved

Medium Speed

<=3

60 – 100km/h

∆Vmb

<=3

0 – 100km/h

∆Vma

<=3

0 – 100/km/h

Reserved

∆Vlb

<=3

0 – 100/km/h

∆Vla

<=3

0 – 100/km/h

Reserved

Output ID

0 – 2

Output Status

0|1

Duration

<=3

0 – 255(×100ms)

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