Rainbow Electronics GM862-QUAD-PY - Manual (Page 3)

Easy GPRS User Guide
80000ST10028 Rev. 4 - 16/07/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 3 of 63
Contents
1 GPRS Operations ............................................................................................................................ 6
1.1 Introduction ............................................................................................................................................6
1.1.1 CSD application example ....................................................................................................................................8
1.1.2 GPRS application example ..................................................................................................................................9
1.2 Preliminary GPRS context parameters setting..................................................................................10
1.2.1 Context parameter setting ..................................................................................................................................10
1.2.2 Minimum Quality of the Service Requested......................................................................................................11
1.2.3 Requested Quality of the Service.......................................................................................................................13
1.3 GPRS context activation and data state entering ..............................................................................15
1.4 GPRS data state exit.............................................................................................................................17
2 Enhanced Easy GPRS Extension ................................................................................................. 18
2.1 Overview................................................................................................................................................18
2.1 Commands Overview ...........................................................................................................................20
2.1.1 Easy GPRS Outgoing Connection .....................................................................................................................20
2.1.1.1 Configuring the GPRS access ...................................................................................................................21
2.1.1.2 Configuring the embedded TCP/IP stack..................................................................................................21
2.1.1.3 Request the GPRS context to be activated ................................................................................................22
2.1.1.4 Open the connection with the internet host ...............................................................................................23
2.1.1.5 Resuming a suspended connection with #SO............................................................................................24
2.1.1.6 Close the Socket without deactivating the context....................................................................................25
2.1.2 Easy GPRS Incoming Connection .....................................................................................................................26
2.1.2.1 Defining the Internet Peer that can contact this device (firewall settings) ................................................26
2.1.2.2 Request the socket connection to be opened in listen ...............................................................................27
2.1.2.3 Accept an incoming connection with #SA ................................................................................................28
2.1.2.4 Checking the socket status with #SS.........................................................................................................28
2.1.2.5 Using FTP and IP Easy together ...............................................................................................................29
2.1.2.6 Using CMUX and Multisocket .................................................................................................................29
2.1.2.7 4.1 Using old interface command on Multisocket.....................................................................................30
2.1.2.8 5.1 Dial Up with Multisocket....................................................................................................................30
2.1.3 Known limitations..............................................................................................................................................30
2.2 FTP OPERATIONS .............................................................................................................................31
2.2.1 Opening and Closing an FTP Connection..........................................................................................................31
2.2.2 Setting the FTP Transfer Type...........................................................................................................................32
2.2.3 FTP File transfer to the server ...........................................................................................................................32
2.2.4 FTP File download from the server ...................................................................................................................33
2.3 AT Commands Compatibility Table...................................................................................................35
2.4 Examples ...............................................................................................................................................36
2.4.1 Easy GPRS - HTTP client application...............................................................................................................36
2.4.2 Easy GPRS - EMAIL sending application.........................................................................................................38
2.4.3 Easy GPRS -EMAIL receiving application .......................................................................................................42
2.4.4 Remote connection between two modules.........................................................................................................44