Telit EZ10-GPRS/-PCS
Product Description
80269ST10014a, Rev. 3 – 26/09/05
Reproduction forbidden without written authorization by Telit Communications S.p.A.
Page 25 of 74
All Rights reserved – Right of modification reserved
2.9.2 Functions of the RS232 Serial Interface
The RS232 standard interface serves to connect a PC, Data Terminal Equipment (DTE) or an
application, which acts as host controller of the EZ10 Terminal with all its functions. Through the
RS232 interface it can be used as GSM/GPRS modem for sending and receiving of SMS, Data
and Fax calls. Establishment and control of voice calls is done by the DTE through this interface,
whereas e.g. a headset to listen and talk has to be connected to the AUDIO connector.
The
Telit EZ10-PCS wireless modem with PYG Option
, on the basis of the
EASY SCRIPT®
feature and with a
PYTHON
script developed by the user, can allow self-controlled operations
which put the RS232 interface in a different serial data transmission mode, e.g. to communicate
with a sensor or actuator.
2.9.2.1 The PC as Data Terminal Equipment (DTE)
Normal Personal Computers (PC), which have a RS232 standard serial interface (COM-port), often
include a software application for using it as Data Terminal Equipment (DTE).
Example
(without success guarantee related to the DTE’s role): Start-Programs-Accessories-
Communications-
Hyper Terminal
. In the prompt window for New connection it is then possible to
give a name and assign a symbol to the DTE. Connect using: the COM-port to which the EZ10
Terminal is connected. Of the default configurations, only the Bits per second should be set to
115200, the rest remains at “8-None-1-Hardware”.
A cursor blinks in a window and the connection to the EZ10 Terminal is already active. In this
moment, it is not possible to see what is typed to the keyboard, but the answer to a correct
command will appear: e.g. type AT+CGMM<enter> and the type of the connected Mobile Station
(MS) will appear on the screen. Type: ATE1<enter> to activate the command echo, which displays
what is typed. AT+CGMR returns the Software version.
For more information about which AT Commands are implemented on the Models of EZ10
Terminals refer to the chapter “AT Command Interface” of this Product Description and the details
can be found in the “GM862 Software User Guide” and “GM862/TRIZIUM FAMILY AT Commands
Description”, available on
www.telit.com
- >Products >Modules >EZ10 Terminal >Download.
NOTE: The character sets used by the terminal programs or equipments might vary and can
cause malfunctions with special characters e.g. ß, @. Verify the related specifications.
2.9.2.2 GSM/GPRS Standard Modem
It is always worth a trial to install the EZ10 Terminal as modem on a PC in the following way, be
aware that the following procedure is just an
example
without success guarantee:
First add it in the PC’s Control Panel – Telephone and Modem. Select from the list the “Standard
33600 bps Modem” with connection to the related COM port, then make a new “Dial-up connection
to private network” using this modem with the dial-up parameters of the GSM/GPRS Network in
use. Sometimes the parameters indicated for the use of the WAP-Browser of mobile phones (over
GSM CSD call or GPRS) will work.
Example (without liability) for a GPRS connection set-up:
Under “Properties-General Configure” the initialization has to be entered in the text box selecting
“Run Script”. The parameters are examples for subscribers of Italian GSM network operators.
Initialization: AT+CGDCONT=1,"IP","web.omnitel.it"