Specifications

GV200 @Track Air Interface Protocol
TRACGV200AN003 – 57 –
3.2.18. Second Serial Port Setting
The second serial port of the device is used to connect with external devices to extend the
application of the device. This command AT+GTURT is used to configure the working mode of
the serial port for different external devices and the parameters for the serial port communication.
 AT+GTURT=
Example:
AT+GTURT=gv200,1,5,8,1,0,0,0,,,0018$
Parameter Length(byte) Range/Format Default
Password 4 – 6 '0' – '9' 'a' – 'z' 'A' – 'Z' gv200
Working Mode 1 0|1|2|3|4|5|6 0
Baudrate Index <=2 1 – 12 12
Data Bits 1 7 – 8 8
Stop Bits 1 1 – 3 1
Parity Bits 1 0 – 4 0
Sleep Enable 1 0|1|2 0
Input ID of Wakeup 1 0|2 0
Digit Fuel Sensor Type 1 0 – 3 0
Reserved 0
Serial Number 4 0000 – FFFF
Tail Character 1 $ $
 <Working Mode>: Configure the working mode of UART2.
 0: Disable UART2.
 1: Use UART2 to transfer data via AT+GTDAT.
 2: Use UART2 for Garmin.
 3: Use specific RFID card reader to communicate with UART2 of GV200. The
GV200 will report the card ID received from the card reader to the backend server
with message +RESP:GTIDA..
Note: Set AT+GTDIS command to enable input port 2 for RFID, set <Input ID of
Wakeup> as 2. If the working mode quit the “RFID mode”, the <Input ID of Wakeup>
must set as 0.
 4: Used for digit fuel sensor.
Note: different fuel sensor support different baud rate, users should make sure that the
baud rate set is suit for the sensor.
 5: Used for AC100 devices.
Note: Any time a new temperature sensor access, you must restart the device to work
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