GS-818 GPS/GSM/GPRS Vehicle Tracker User Manual
66 Copyright © 2011 San Jose Technology, Inc. All Rights Reserved.
Setup Extra INFO Bit
Except for the basic information such as IMEI, username, password, GPRMC sentence, and respond command, in each and
every report from the device, user can enable some Extra Information in the end of each report called <Extra Info Bit>.
These Extra Reports are:
I/O Status, ACC Status, Battery Status, and Power Supply Source Status.
HDOP Value, Range from 0~50 (Reference:
http://en.wikipedia.org/wiki/Dilution_of_precision_(GPS)
)
The number of GPS Satellite Fixed, Range from 0~16
7 sets of Cell ID and GSM base Station Signal Strength (including MCC, MNC, LAC, Cell, and RxLev)
TA Value: Timing advance for the serving cell, in bits
RSSI, received signal strength indicator (Reference:
http://en.wikipedia.org/wiki/Received_signal_strength_indication
)
SMS Report Failure Indication Name: when the report route is set as SMS, you can set up the device to report either
username or IMEI in the failure respond commands.
The <Extra Info Bit> is represented by 4 hexadecimal characters. Each character represents 4 bit binary number. When
the bit is set to 1, the specific Extra Info is enabled for the user selection. The least significant bit (LSB) represents first
extra info response. The Most Significant bit (MSB) represents the last Extra Info response. Only 16 bits can be enabled
for the Extra Info, and only 13 are useful, the other 3 are reserved for now. See following example for more
understanding.
Setup Format: #username,0000,info,<0x0000~0xFFFF>*
Example 1:
If you want to enable Analog Input 1&2 (Voltage), that is “bit13”.
So the binary code will be 0010 0000 0000 0000 = 0 (bit15) 0 (bit14)
1
(bit13) 0 (bit12) … 0 (bit2) 0 (bit1) 0 (bit0)
Now we convert binary code to Hexadecimal code:
0010=2
0000=0
0000=0
0000=0
So the HEX code is 2000.
Therefore, the SMS command to enable Analog 1&2 will be:
#username,0000,info,0x
2000
*
