13
5.22.2 Set APN
Setup: Send SMS apn+123456+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.
5.22.3 Set APN’s User Name
Setup: Send SMS apnuser+123456+space+the sim card’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.
5.22.4 Set APN’s Password
Setup: Send SMS apnpassword+123456+space+the sim card’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.
5.22.5 GPRS transport 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 hand up and report the coordinates to IP address.
The message format sent by tracker to IP address is as following:
Serial number + authorized number + GPRMC + GPS signal indicator + command +
IMEI number + CRC16 checksum.
For example:
090907070718,13145826175,GPRMC,070718.000,A,2234.0228,N,11403.0764,E,0.00
,,070909,,,A*73,F,,imei:354776030042714,05,50.1,F:4.11V,0,132,40512,460,01,2533,7
20B
090907070718== serial number(date&time)
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