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GMT00 @Track Air Interface Protocol

TRACGMT100AN001 – 37 –

 0: Disable the tow alarm

 1: Enable the tow alarm

 <Engine Off to Tow>: A time parameter to judge whether the device is considered being

towed after the engine off. If the motion sensor doesn‟t detect stillness within the specified

time after engine off, the device is being towed.

 <Fake Tow Delay>: After engine off and stillness detected, if the motion sensor detects

moving again, the device turns into a state called fake tow. If the device keeps in fake tow

after a period of time defined by the parameter <Fake Tow Delay>, it is considered being

towed.

 <Tow Interval>: The period to send tow alarm message.

 <Tow Output ID>: The ID of the output port to output the specified wave shape when tow

event is detected.

 <Tow Output Status>: Please refer to the parameter <Output1 Status> in the chapter 3.2.5

when <Tow Output ID> is set to 1 and refer to the parameter <CUT Relay Status> in the

chapter 3.2.5 when <Tow Output ID> is set to 2.

 <Tow Output Duration>: Please refer to the parameter <Duration> in the chapter 3.2.5 when

<Tow Output ID> is set to 1.

 <Tow Output Toggle Times>: Please refer to the parameter <Toggle Times> in the chapter

3.2.5 when <Tow Output ID> is set to 1.

 <Rest Duration>: A time parameter to make sure that the device enters stillness status, i.e. the

status of the device will be changed to stillness if the motion sensor detects stillness and

maintains for a period of time defined by the parameter <Rest Duration>.

 <Motion Duration>: A time parameter to make sure that the device enters motion status, i.e.

the status of the device will be changed to motion if the motion sensor detects motion and

maintains for a period of time defined by the parameter <Motion Duration>.

 <Motion Threshold>: The threshold for the motion sensor to measure whether the device is

moving.

 <Working Time Enable>: A time parameter to make sure that the device enters motion status,

i.e. the status of the device will be changed to motion if the motion sensor detects motion and

maintains for a period of time defined by the parameter <Motion Duration>.

 <Motion Threshold>: The threshold for the motion sensor to measure whether the device is

moving.

The acknowledgment message of AT+GTTOW command:

 +ACK:GTTOW,

Example:

+ACK:GTTOW,080100,135790246811220,,000B,20090214093254,11F0$

Parameter

Length(byte)

Range/Format

Default

Protocol Version

XX0000 – XXFFFF,

X∈{'A' – 'Z','0' – '9'}

Unique ID

IMEI

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