GLOBALSAT TR-151 - Manual (Page 21)

2.1.12 How to make TR-151 to make SMS & GPRS immediate report
by GPRS server?
You can send a command by GPRS server to ask TR-151 to immediately report its position
via GPRS network to GPRS server and to SMS receiver interface like handset.
The format of command is as below.
$21,IMEI,Return_Phone_Number!
The description of command
Format Description
$21 Start sign and function code
IMEI IMEI of TR-151
Return_Phone_Number The phone number for receiving SMS report.
! End sign
TR-151 will send a command “$OK!” to the GPRS server to confirm it has received the
request. And then it will start to get fixed the position. After getting fixed the position, it will
send its location to GPRS server and to SMS receiver interface like handset.
Example: Require GPRS immediate report sent to GPRS server and phone number 626-123456
You have to enter “$21,355632000166323,626123456!”
And then you will get “$OK!”
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