I don't see this in the alarms for this device, but I can see them in the data stream where I decode it separately.
iStartek provided this documentation:
Harsh speed up alarm code 0x80, harsh speed down code is 0x81
Set alarm command:
W******,312,V1,V2,T1,T2
@@<L><ID><0x4312><a1,a2,T1,T2><checksum>\r\n
a1=Acceleration change, default is 7 km/h/s.
a2=rapid deceleration change，default 7 km/h/s.
T1=The time to accelerate continuously，default set is 3s
T1=The time for rapid deceleration, default set is 3s
Eg.：W000000,312,6,6,3,3
When the acceleration lasts for 3 seconds with more than 6 km/h/s, a harsh speed up alarm is generated.
They sent me specific firmware for this and presumably only this version and above have this feature.
VT900_3G_V1.66_D10_20171222.Bin
Looks like you are right and they are not decoded at the moment.
I don't see this in the alarms for this device, but I can see them in the data stream where I decode it separately.
iStartek provided this documentation:
Harsh speed up alarm code 0x80, harsh speed down code is 0x81
Set alarm command:
W******,312,V1,V2,T1,T2
@@<L><ID><0x4312><a1,a2,T1,T2><checksum>\r\n
a1=Acceleration change, default is 7 km/h/s.
a2=rapid deceleration change，default 7 km/h/s.
T1=The time to accelerate continuously，default set is 3s
T1=The time for rapid deceleration, default set is 3s
Eg.：W000000,312,6,6,3,3
When the acceleration lasts for 3 seconds with more than 6 km/h/s, a harsh speed up alarm is generated.
They sent me specific firmware for this and presumably only this version and above have this feature.
VT900_3G_V1.66_D10_20171222.Bin