Owner's manual

Easy GPRS User Guide

80000ST10028 Rev. 4 - 16/07/08

2.4.3 Easy GPRS -EMAIL receiving application

Let's suppose we want to receive with our embedded device an EMAIL by using a POP3 server.

Initial data:

Server to be contacted POP.mail.server

POP service port #110

Application Layer Protocol POP3 (RFC1785)

Receiver

"module"<module@domain.com>

Email account username module@domain.com

Email account password telit

GPRS settings

APN internet.gprs

IP of GPRS device dynamically assigned by the

network

DNS assigned by the network

USERID EASY GPRS

PASSWORD EASY GPRS

Socket parameters

Connection Identifier 1

Packet size (used by

TCP/UDP/IP stack for data

sending)

300

Socket inactivity timeout 90

Connection timeout 600

Data sending time out 50

Checking on the RFC1785, we can found that the port 110 is dedicated for POP3 service, therefore

our POP 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 110.

Second thing we have to discover is whether the transport protocol has to be TCP or UDP; on the

RFC1785 we can read that the POP3 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 can now 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)

For all the socket settings the following AT command will be used:

AT#SCFG=1,1,300,90,600,50