INSYS GSM 4.3 I4, Manual

Page: 38 / 78

Functions INSYS GSM 4.3 I4
38
11.3 Checking the Status of the GSM Login
The INSYS GSM 4.3 I4 logs in into the GSM network automatically with each restart of
the device. The login status into the GSM network may be requested for test purposes.
Then, you can see, whether the INSYS GSM 4.3 I4 is logged out at the moment, whether a
network search is performed, whether a login has been refused by the GSM network, or
whether the device is logged in into a foreign network via roaming.
Configuration with HSComm
The
Login state
is indicated in text form in HSComm on the “Basic Settings”
tab in the “GSM Connection” panel under “PIN active”.
Configuration with AT commands
In order to request the Status of the GSM
login
, use the command
AT+CREG?
The Status is indicated in the reply by the second number following the
comma.
Reply example
<+CREG: 0,3>
The following status replies are possible:
Not logged in, no GSM network search
0
Logged in with the standard provider
1
Not logged in, INSYS GSM 4.3 I4 searches for
GSM network
2
GSM network refuses a login
3
Logged into a foreign network via roaming
5
11.4 Checking the GSM Signal Quality
You can check the signal field strength at the location of the INSYS GSM 4.3 I4. The signal
quality has an essential effect on the data transmission speed. If the signal field strength
is too low, the transmission speed may drop too much or the connection may be termi-
nated completely. The signal field strength is visible for you in three ways: via the flash-
ing frequency of the signal LED, via HSComm, or via an AT command.
Configuration with HSComm
In order to open a dialog window with the
current signal field strength
, click
on the “Basic Settings” tab in the “GSM Connection” panel the “detect GSM
intensity” button.