Specifications

GT300 @Track Air Interface Protocol
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4.6. Motion Sensor Alarm
The terminal is integrated with a motion sensor to detect falling event. By command
AT+GTMSA, the sensitivity of the sensor could be adjusted from level 1 to level 10, the less the
more sensitive. When a falling event is detected, there is first a notification displayed on the
screen of the terminal with option to cancel the alarm if misinform. If the end user confirms the
alarm or does not cancel the alarm within <alarm timeout> seconds, according to the working
mode, the terminal will auto dial the number set by <falling call> or send the current position to
the backend server via +RESP:GTMSA message, or perform both actions.
When working on mode 3, sending position after falling call, if the falling accident occurs during
a phone call, the terminal will send the position information only. There would be no phone call
to the <falling call> number.
If the „send last position‟ set to 1 and the working mode is 2 or 3, the device will send the last
known GPS position to the backend server before making the falling call or sending the current
position.
Example1:
An example is given as following to make the falling call:
AT+GTMSA=gt300,1,,3,5,[phone],,,0005
By this command, the motion sensor alarm is enabled. The sensitivity is set to 3 and the timeout
to cancel the alarm is set to 5 seconds. If a falling event is detected, the terminal will call the
number [phone].
Sending last position before making the falling call:
AT+GTMSA=gt300,3,1,3,5,[phone],,,0005
By this command, the device will send the last known position before making the falling.
The command is accepted by the terminal when the backend server receives the following
message:
+ACK:GTMSA,135790246811220,0005,20090101000002,11F0,0102070202
The terminal will then report the falling alarm as following:
+RESP:GTMSA,135790246811220,1,0,0,1,4.3,92,70.0,1,121.354335,31.222073,2009010100000
0,0460,0000,18d8,6141,00,11F0,0102070202
The last known position:
+RESP:GTLGL,135790246811220,1,0,0,0,4.3,92,70.0,1,121.354335,31.222073,20090101000000
,0460,0000,18d8,6141,00,11F0,0102070202