13
Setup: Send SMS apn+space+specify apn content.
If setup successful, the tracker will reply SMS “APN ok”.
Cancel: The old APN will be invalid automatically when a new APN is set.
5.15.3 Set APN’s User Name
Setup: Send SMS space+APN's user name.
If setup successful, the tracker will reply SMS “apnuser ok”.
Cancel: The old APN user name will be invalid automatically when a new APN uer
name is set.
5.15.4 Set APN’s Password
Setup: Send SMS apspace+the APN's password.
If setup successful, the tracker will reply SMS “apnpasswrod ok”.
Cancel: The old APN password will be invalid automatically when a new APN password
is set.
5.15.5 GPRS communication protocols
As soon as the IP & Port & APN are set up, the user can make a call or send SMS to
tracker. The tracker will hang up and report the coordinates to IP address.
The message format sent by tracker to IP address is as following:
Serial authorized GPRMC + GPS signal ind alert command
+ IMEI number + Number of satellites + ABattery External power
Length of the CRC16 checksum.
For example, it will send GPS coordinates as below illustrated
091029025041,13145826175,GPRMC,025041.000,A,2234.0528,N,11403.0760,E,0.00
,0.00,291009,,,A*61,F,, imei:354776033427755,07,57.7,F:4.18V,0,136,720A
WWW.GPS-TEKNIK.SE
WWW.GPS-TEKNIK.SE
