CES GPS-205, User Manual, Page: 15 / 16

© CES Wireless Technologies Corp – 2007 Page
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Appendix 2
– Troubleshooting
All the troubleshooting steps require the GPS205S to be in “Manual Mode”. To enable this mode select
the Program menu and select “Mode – Manual”. If this selection is not shown the software is in this mode
already. The software can return to automatic mode by selecting the Program menu and then selecting
“Mode – Auto”.
A2.1 Verifying the GPS205 has Established a GSM Connection
To verify that the GPS205 has established a GSM connection follow these steps.

Is the antenna attached?

Is the SIM card installed? The SIM card must be installed to establish a connection.

In the GPS205S, Select Function section select Query Commands. This selection is only
displayed when the software is in Manual Mode.

In the Query Commands section click on the “Verify GSM Status” button.

The modem will reply in the text box at the bottom of the software. If you do not get a reply from
the modem verify that has power (12V) and that the correct serial port is selected in the software.

Modems response: the modem responds with “+CREG: followed by two parameters, comma
separated.
o
The desired response is “+CREG: 0,1” or “+CREG: 0,5”.
o
Parameter 1

0: disable network registration unsolicited result code

1: enable network registration unsolicited result code

2: enable network registration and location information unsolicited result code
+CREG
o
Parameter 2

0: not registered, ME is not currently searching a new operator to register to

1: registered, home network

2: not registered, but ME is currently searching a new operator to register to

3: registration denied

4: unknown

5: registered, roaming
o
If the desired response is not received please discuss the programming of the SIM card
with your cellular service provider.
A2.2 Verifying the GPS205 has Established a GPRS Connection
To verify that the GPS205 has established a GPRS connection follow these steps.

Is the antenna attached?

Is the SIM card installed? The SIM card must be installed to establish a connection.

In the GPS205S, Select Function section select Query Commands. This selection is only
displayed when the software is in Manual Mode.

In the Query Commands section click on the “Verify GPRS Status” button.

The modem will reply in the text box at the bottom of the software. If you do not get a reply from
the modem verify that has power (12V) and that the correct serial port is selected in the software.

Modems response: the modem responds wi th “%CGREG: followed by two parameters, comma
separated.
o
The desired response is “%CGREG: 0,1” or “%CGREG: 0,5”.
o
Parameter 1

0: disable network registration unsolicited result code

1: enable network registration unsolicited result code +CGREG

2: enable network registration and location information unsolicited result code
+CGREG