
GV300 @Track Air Interface Protocol
3.2.14. SOS Function
This command is used to configure the specified input port for emergency. When an emergency
occurs, the end user can use this input port to trigger the emergency call and report position
message +RESP:GTSOS to the backend server. A specified wave shape can be configured to
output on specified output port. The volumes for both the microphone and speaker during the SOS
phone call are configurable.
¾ AT+GTSOS=
Example:
AT+GTSOS=gv300,1,1,+8613812341234,1,1,0,0,,,,,000D$
Parameter Length(byte) Range/Format Default
Password 4 – 6 '0' – '9' 'a' – 'z' 'A' – 'Z' gv300
Mode 1 0 – 4 0
Digital Input ID 1 0|1 – 3 0
SOS Number <=20
Output ID 1 0 – 3
Output Status 1 0|1
Duration <=3 0 – 255(×100ms) 0
Toggle Times <=3 0 – 255 0
SOS Microphone 2 0 – 10 5
SOS Speaker 1 0 – 7 4
Reserved 0
Reserved 0
Serial Number 4 0000 – FFFF
Tail Character 1 $ $
<Mode>: The working mode of SOS function.
z 0: Disable SOS function.
z 1: SOS call only.
z 2: Send the current position to the backend server only.
z 3: Send the current position to the backend server first and then make SOS call.
z 4: Send the current position to the backend server via SMS and make SOS call.
<Digital Input ID>: ID of the digital input port which triggers the SOS function. 0 means the
SOS function is disabled. The corresponding digital input port should be configured by the
command AT+GTDIS first. If configured to trigger the SOS function, there is no
+RESP:GTDIS report message for the specified digital input port.
TRACGV300AN002 – 41 –
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