Справочник Пользователя для Telit Wireless Solutions Easy GPRS
Easy GPRS User Guide
80000ST10028 Rev. 0 - 02/01/07
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 28 of 35
NO CARRIER
The Telit module is now back to command mode.
2.3.2 Easy GPRS - EMAIL sending application
Let’s suppose we want to send with our embedded device an EMAIL by using a SMTP server.
Initial data:
Server to be contacted
smtp.domain.com
SMTP service
port #25
Application Layer Protocol
SMTP (RFC821)
Sender
"module"<module@domain.com>
Email account username
Email account password
telit
Receiver
"Receiver"<receiver@server.net>
Subject
Email Test
Message body
This message is sent in order to test Easy
GPRS feature. Hello World!
GPRS feature. Hello World!
GPRS settings
APN
APN
internet.gprs
IP of GPRS device
dynamically assigned by the network
DNS
assigned by the network
USERID
EASY GPRS
PASSWORD
EASY GPRS
Checking on the RFC990 the SMTP service we can found that the port 25 is dedicated for SMTP
service, therefore our SMTP server will be waiting for incoming connections on that port and we will fix
the EASY GPRS port to be contacted on the remote server exactly to 25.
Second thing we have to discover is whether the transport protocol has to be TCP or UDP; on the
RFC821 we can read that the SMTP Application layer protocol is meant to be on top of TCP/IP
protocol, therefore the transport protocol choice will fall on TCP.
Now we have all the information needed to configure our system.
With our microcontroller we issue to the Telit module the following AT commands:
AT+CGDCONT = 1,"IP","internet.gprs","0.0.0.0",0,0<cr>
(1-GPRS context setting)
AT#USERID = "EASY GPRS"<cr>
(2-Authentication
setting)
AT#PASSW = "EASY GPRS"<cr>
(2-Authentication
setting)
AT#PKTSZ=300
(3-Socket setting)
AT#DSTO=50
(3-Socket setting)
AT#SKTTO=90
(3-Socket setting)
AT#SKTCT=600
(3-Socket setting)