Specifications

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
1
0|1
0
Reserved
0
Reserved
0
High Speed
<=3
100 – 400km/h
100
∆Vhb
<=3
0 – 100km/h
0
∆Vha
<=3
0 – 100km/h
0
Reserved
0
Medium Speed
<=3
60 – 100km/h
60
∆Vmb
<=3
0 – 100km/h
0
∆Vma
<=3
0 – 100/km/h
0
Reserved
0
Reserved
0
∆Vlb
<=3
0 – 100/km/h
0
∆Vla
<=3
0 – 100/km/h
0
Reserved
0
Output ID
1
0 – 2
0
Output Status
1
0|1
0
Duration
<=3
0 – 255(×100ms)
0
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