Insys i-modul GPRS serial Designer’s Guide

Designer's Guide

i-modul GPRS 3.1 serial

Any duplication of this manual is prohibited. All rights on this documentation and

the devices are with INSYS MICROELECTRONICS GmbH Regensburg.

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able for use.

MNP is a registered trademark of Microcom Inc.

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poration.

INSYS®, e-Mobility LSG® and e-Mobility PLC® are registered trademarks of INSYS

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Publisher:

INSYS MICROELECTRONICS GmbH

Hermann-Köhl-Str. 22

D-93049 Regensburg, Germany

Phone: +49 941 58692 0

Fax: +49 941 58692 45

E-mail: [email protected]

Internet: http://www.insys-icom.com

Date: Jul-12

Item: 31-22-04.036

Version: 1.0

Language: EN

Content

1 General ....................................................................................................7

1.1 Function Overview.................................................................................................7

1.2 Application Example..............................................................................................8

1.3 History ...................................................................................................................9

2 Technical Data .......................................................................................10

2.1 General ................................................................................................................10

2.2 Physical Features.................................................................................................10

2.3 Dimensions..........................................................................................................11

2.4 Height profile.......................................................................................................11

2.5 Electrical Features ...............................................................................................12

2.6 Interface ..............................................................................................................13

2.6.1 P1 - 32-pin connector strip..................................................................... 13

2.6.2 P2 - 8-pin connector strip....................................................................... 13

2.7 Connector strips ..................................................................................................14

2.8 Antenna ...............................................................................................................14

2.9 SIM card ..............................................................................................................14

2.10 IO signals.............................................................................................................15

2.10.1 Digital inputs and outputs ...................................................................... 15

2.10.2 Reset ...................................................................................................... 16

2.10.3 Indication Signals ................................................................................... 17

2.11 Internal Design ....................................................................................................20

2.12 Operating Modes.................................................................................................21

2.12.1 Command Mode .................................................................................... 21

2.12.2 Connection mode................................................................................... 21

3 Utilization Notes.....................................................................................22

4 Connection ............................................................................................23

4.1 Logging into the GSM Network...........................................................................24

4.2 TCP Transparent (GPRS Modem Emulation)........................................................25

4.2.2 Defaults .................................................................................................. 25

4.2.3 Settings for the leased line..................................................................... 26

4.2.4 Settings for TCP Listen (incoming TCP connections) ............................ 27

4.2.5 Manual connection setup....................................................................... 28

4.2.6 Automatic connection setup (leased line) .............................................. 28

4.2.7 Connection acceptance.......................................................................... 29

4.2.8 During the connection............................................................................ 30

4.2.9 Termination ............................................................................................ 32

4.3 GSM Data Connection (CSD Call) ........................................................................33

4.3.1 Connection setup ................................................................................... 33

4.3.2 Incoming connections............................................................................ 33

4.3.3 Termination ............................................................................................ 34

4.3.4 Connection to analogue modems .......................................................... 34

4.3.5 Connections to ISDN TAs....................................................................... 35

4 Jul-12

Contents

4.4 Direct GPRS Connection via PPP.........................................................................36

4.4.1 GPRS APN (PDP context) ....................................................................... 36

4.4.2 PPP-Authentication Type ....................................................................... 36

4.4.3 GPRS connection setup ......................................................................... 37

4.4.4 GPRS connection termination ................................................................ 37

5 Functions ...............................................................................................38

5.1 Access Control ....................................................................................................38

5.1.1 Password protection .............................................................................. 38

5.1.2 Selective call acceptance ....................................................................... 38

5.2 Establishing a Connection by Callback ................................................................40

5.3 Defined termination of GPRS connections for incoming CSD calls ("CSDPRIO") 43

5.3.1 CSD priority with caller authentication .................................................. 44

5.3.2 CSD priority without caller authentication ............................................. 44

5.4 Automatic Logout and Login or Restart of the Device.........................................45

5.4.1 Automatic login at restart....................................................................... 45

5.4.2 Periodic Logout and Login or Restart of the Device .............................. 45

5.5 Automatic SMS Processing .................................................................................47

5.5.1 Activation ............................................................................................... 47

5.5.2 Reading interval...................................................................................... 47

5.5.3 Syntax..................................................................................................... 48

5.5.4 Access Protection................................................................................... 49

5.5.5 SMS storage locations ........................................................................... 49

5.6 Manually Dispatching SMS .................................................................................50

5.7 Digital Inputs and Potential-Free Outputs ............................................................51

5.7.1 Automatic SMS dispatch via the switch input....................................... 51

5.7.2 Connection setup via switch input......................................................... 53

5.7.3 Transmitting the input states to another i-modul GPRS 3.1 serial (IO

tunneling) ............................................................................................... 53

5.8 Remote configuration ..........................................................................................56

5.9 Firmware Update.................................................................................................57

5.10 Virtual COM Port .................................................................................................58

6 Short Description INSYS AT Commands................................................59

6.1 Overview .............................................................................................................59

6.2 Availability/Storage..............................................................................................62

7 Description of the AT Commands ..........................................................63

7.1 INSYS AT Commands..........................................................................................63

7.1.1 General Commands................................................................................ 63

7.1.2 Diagnosis Commands .......................................................................... 112

7.2 AT Commands...................................................................................................113

7.2.1 AT Commands According to V.25ter ................................................... 113

7.2.2 AT Commands for GSM Connection.................................................... 118

7.2.3 AT commands for SMS........................................................................ 120

7.2.4 AT commands for GPRS ...................................................................... 123

Jul-12 5

Content

6 Jul-12

8 Sample Connection..............................................................................127

8.1 Indication Signals ..............................................................................................127

8.2 Power Supply Dimensioning..............................................................................127

8.2.1 Basic Display of the Current Path during a Connection....................... 127

8.2.2 Example of Calculation for Designing a Backup Capacitor.................. 128

9 GPRS General ......................................................................................131

9.1 Application Notes ..............................................................................................131

9.1.1 GSM ..................................................................................................... 131

9.1.2 GPRS .................................................................................................... 131

9.2 Network Design.................................................................................................132

9.3 TCP Transparent ................................................................................................133

9.4 IP Addresses/Accessibility .................................................................................134

9.4.1 Fixed IP address and VPN connection ................................................. 135

9.5 Data Rates .........................................................................................................136

9.6 Quality of Service (QoS).....................................................................................137

9.7 Delay Times .......................................................................................................137

9.8 Calculation Examples for Data Transmission via GPRS......................................138

9.8.1 Application description......................................................................... 138

9.8.2 General data amount............................................................................ 139

9.8.3 Calculation example ............................................................................. 141

10 Sending SMS as Fax or E-mail .............................................................143

10.1 SMS as Fax........................................................................................................143

10.2 SMS as E-Mail ...................................................................................................143

11 GPRS Dial-In Parameters .....................................................................144

12 FAQ......................................................................................................145

13 CE/EMC Compliant Integration ............................................................148

13.1 Your Application ................................................................................................148

13.2 Application Interface / Terminal Strip P1 ...........................................................148

13.3 Network Interface / Terminal Strip P2 (for Modem /ISDN).................................148

13.4 Antenna Connection (if equipped) .....................................................................149

13.5 Further Recommendations ................................................................................149

13.6 Reference Documents .......................................................................................149

14 Declaration of Conformity....................................................................150

15 International Safety Instructions ..........................................................151

15.1 Safety Precautions.............................................................................................152

i-modul GPRS 3.1 serial General

1 General

1.1 Function Overview

The i-modul GPRS 3.1 serial is a module for industrial applications.

It offers the following characteristics and features:

 Quadband GSM engine for all four frequency ranges: 850 / 900 / 1800 /

1900 MHz (The i-modul GPRS 3.1 serial can be used worldwide)

Before using the i-modul GPRS 3.1 serial you should check the cer-

tification requirements in the country of deployment, see Chapter

12.

 Integrated TCP/IP and PPP stack for transparent modem emulation via

GRPS (GRPS modem emulation)

 GSM services: GSM/CSD data connection, SMS, GPRS Class 12

 Support for the virtual COM port driver VCOM from

INSYS MICROELECTRONICS GmbH

 Integrated TCP/UP stack for modem-compatible behavior with transparent

transfer of data from and to the serial interface (“TCP transparent”).

 Active dialing of IP addresses or domain names with TCP connections

to a server

 Accepts TCP connections ("TCP Listen")

 Dedicated line function (leased line); design as CSD or TCP/IP possible;

intelligent re-dialing time-outs for TCP/IP cost cutting; configurable

substitute access for redundant paths.

 Callback function for incoming calls; callback as CSD or “TCP

transparent" possible

 Defined termination of GPRS connections for incoming CSD calls

("CSDPRIO")

 Access protection via phone number analysis (CLIP) for incoming CSD

calls, incoming SMS, when starting a callback, and when the priority for

CSD calls is set.

 Password protection for remote configuration and configuration via SMS

 Storage of the SIM card PIN enables automatic login into the GSM

network after reset/restart

 Timer-controlled logout and login into the GSM network or restart of the

device, to prevent undefined login states in the GSM network

 Automatic dispatch of a predefined SMS when the switch input is

activated.

7

General i-modul GPRS 3.1 serial

 Advance switch input functionality: Connection setup and "IO tunneling"

(transmitting the input states via a TCP connection)

 Standard AT command set according to GSM 07.05 and GSM 07.07

 Extended AT command set (INSYS AT command for additional functions)

 Automatic processing of incoming SMS for configuration or connection

setup, also during existing connections

 Firmware update (locally and remote)

 Integrated SIM reader and external SIM interface for 3V / 1.8 V SIM cards

 Hardware watchdog

 Extended data formats for the serial interface

 Hardware and software handshake at the serial interface

 Field strength of the GSM network, status display of the i-modul GPRS 3.1

serial

1.2 Application Example

8

Controller

GPR

Internet

Central station

{{{PRODUKTBEZEICH-

NUNG}}}

i-modul GPRS 3.1 serial General

1.3 History

Version Additional functions

1.00  Redesign

2.001

 Further development:

 Accepts incoming TCP connections ("TCP Listen"),

replacement destinations for AutoDial

 Substitute access for TCP Leased Line

 Termination of GPRS connections for incoming CSD

calls ("CSDPRIO")

 Software handshake at serial interface

 Automatic dispatch of an SMS via switch input

2.100

 Enhancement:

 CSDPRIO without CLIP

 IO tunneling via TCP/IP

 Advanced IO functions: Connection setup and SMS

dispatch triggered via second switch input

 PPP user name extended to 38 characters

 New baud rate 28800

2.200

 Enhancement:

 Baud rate 14400 configurable

 Effect of ATV and ATQ also for self-defined URCs

 TSC/IPT telegram receive terminal

 Maintaining the GPRS connection after terminating a

TCP/TSC/IPT leased line connection

 Incrementation of the delay between leased line dial-up

attempts

 Remote configuration of the automatic call acceptance

 AT commands AT+IPR, AT**BAUD, AT**IPTTIMEOUT,

AT**LLWAITRST, AT**LLWAIT, AT**S0 extended or

changed

3.000

 Enhancement:

 New command AT#SYS for displaying system

information

 Command AT**PPPIPCHECK enhanced

9

Technical Data i-modul GPRS 3.1 serial

2 Technical Data

2.1 General

GPRS Data transmission GPRS Multislot class 12

Coding scheme 1 to 4

Mobile Station Class B

Support PBCCH

CSD Data transmission V.21 (300 bps), V.22 (1200 bps), V.22bis (2.400 bps), V.32

(4.800/9.600 bps), V.34 (14400 bps), V.110

(300/1.200/2.400/4.800/9.600/14.400)

Fax Group 3, class 1

SMS MO and MT text und PDU mode, and automatic MT SMS processing

Voice HR/FR, EFR

Baud rates 300, 600, 1.200, 2.400, 4.800, 9.600, 19.200, 28.800, 38.400,

57.600, 115.200, 230.400, 460.800

Data formats 8N1, 8E1, 8O1, 8N2, 7E1, 7O1, 7N2, 7E2, 7O2

I/O 2 digital inputs (pull-up), 2 digital outputs

Temperature range -20 °C - 55 °C

Output power EGSM 850 and 900: Class 4 (2 W)

GSM 1800 and 1900: Class 1 (1 W)

2.2 Physical Features

Physical Features

Dimensions w x l x h 56.4 mm x 56.4 mm x 14 mm

Weight 28 g

Pitch dimension of the connector 2,0 mm

Diameter of the fastening holes 2,5 mm

Plug height over board edge 6,4 mm

10

i-modul GPRS 3.1 serial Technical Data

2.3 Dimensions

2.4 Height profile

1,65

6,4

Specifications in mm

This height profile is the maximum height profile for the i-modules. However,

the exact height profile can differ.

Note: Please observe the maximum height profile for your design to re-

serve the use of all, also future technology, and to preserve the

compatibility for possible design changes.

11

Technical Data i-modul GPRS 3.1 serial

2.5 Electrical Features

All specified technical data was measured with a nominal input voltage, full

load, and an ambient temperature of 25.0 °C. The threshold value tolerances

are subject to typical fluctuations. A maximum of one value may be operated

in the threshold value range.

The values were determined for a GSM receiving field strength of 16. For

lower field strengths on site, the values will increase, especially for CSD or

GPRS data transmissions.

The current consumption during data transmissions may also increase if the

antenna is not adjusted correctly.

This can occur when:

- The antenna and/or the antenna cable are not adjusted to 50 Ω

impedance.

- The antenna that is being used is misaligned due to the situation at the

installation site (metal parts, …).

Voltage 3.3 V – 5 V DC + 5 %

Note: Regarding the applied supply voltage, the maximum voltage

drop during the transmit burst may total 400mV.

Current consumption:

Value

Standby Approx. 200 mA

CSD/GPRS data transmission Approx. 450 mA

Data transmission GPRS Class 10 Approx. 700 mA

Data transmission GPRS Class 12 Approx. 900 mA

Transmit Burst CSD/GPRS Class 8/10 Max. 3A

Transmit Burst GPRS Class 12 Max. 2A

The values during data transmission are averaged. For the current and volt-

age development during transmission, see Chap. 7.3.

12

i-modul GPRS 3.1 serial Technical Data

2.6 Interface

2.6.1 P1 - 32-pin connector strip

Pin Type Signal Description

1 GND Ground

2 Supply VCC 5V DC supply voltage

3 GND Ground

4 Input TXD~ Transmit signal of the RS232 line; TTL level

5 GND Ground

6 Output RXD~ Receive signal of the RS232 line; TTL level

7 Output ID-PIN2 NC (high impedance)

8 Input RTS~ Request To Send; TTL level (RS232 signal)

9 Output ID-PIN1 GND

10 Output CTS~ Clear To Send; TTL level (RS232 signal)

11 Input RESET~ Reset input

12 Input DTR~ Data Terminal Ready; TTL level (RS232 signal)

13 Output OH~ Off Hook; TTL level

14 Output DCD~ Data Carrier Detect; TTL level (RS232 signal)

15 Output RI~ Ring Signal; TTL level (RS232 signal)

16 Output DSR~ Data Set Ready; TTL level (RS232 signal)

17 Output UA1 Switch output; TTL level

18 Input UE1 Switch input; TTL level

19 Output UA2 Switch output; TTL level

20 Input UE2 Switch input; TTL level

21 N/C Not connected

22 N/C Not connected

23 N/C Not connected

24 N/C Not connected

25 LED Output STATUS Output for Low Power LED; Status indicator GSM login

state/GPRS IP allocated/TCP Connect

26 Output SIMCLK Clock line for external card holder

27 Output SIMVCC Supply voltage for external card holder

28 I/O SIMDATA Data line for external card holder

29 Input SIMPRES Input CCIN of the external card holder

30 Output SIMRST Reset line for external card holder

31 LED Output SIGNAL Output for Low Power LED, field intensity of GSM signal

32 LED Output SYNC Output for Low Power LED; SYNC pin of the GSM/GPRS

engine

2.6.2 P2 - 8-pin connector strip

8-pin connector strip – only for mechanical fastening

13

Technical Data i-modul GPRS 3.1 serial

2.7 Connector strips

Recommended connector strips to connect the module to the customer ap-

plication:

32-pin connector (P1): SAMTEC TW series 2-row 0.08 in pitch

Fischer SLY 6 / 81 32 Z

8-pin connector (P2): SAMTEC TW series 2-row 2mm pitch

Fischer SLY 6 / 81 8 Z

2.8 Antenna

The antenna connector at the i-modul GPRS 3.1 serial is a RF connector type

Hirose U.FL.

Part number of the connector at the i-modul GPRS 3.1 serial:

Hirose U.FL-R-SMT CL331-0471-0-10

Adapter cables at FME male to connect commercial FME GSM antennas are

available from INSYS MICROELECTRONICS GmbH.

2.9 SIM card

The i-modul GPRS 3.1 serial requires a 3V/1.8V SIM card from a GSM pro-

vider for operation. The SIM card is the identification for the network pro-

vider.

The SIM card must be placed into the carrier with the contacts downward to

ensure that the contacts are on top of each other.

Change the SIM card only when the device is switched off.

It is also possible to direct the Pins 26 to 30 outward, in order to implement

an external SIM card holder. Otherwise the pins will remain unwired.

Note: For the implementation of an external SIM card holder certain

permission guidelines apply, e.g. the max. line length and the

SIM card holder that can be used are defined.

Please request more detailed information from [email protected].

14

i-modul GPRS 3.1 serial Technical Data

2.10 IO signals

2.10.1 Digital inputs and outputs

Pin Signal Type Level Description

18 UE1 Input TTL Input 1:

Can be activated by a short circuit at GND. In open condition,

they lie over pull-up resistors at logical “1”.

The status of the inputs can be queried by the software com-

mand AT*IN?.

17 UA1 Output TTL Switch output 1:

HIGH/LOW: Can be set to “high” or “low” via the command

AT**OUT1 to switch off an external device.

The current status is displayed using AT**OUT? when queried.

20 UE2 Input TTL Input 2:

Can be activated by a short circuit at GND. In open condition,

they lie over pull-up resistors at logical “1”.

The status of the inputs can be queried by the software com-

mand AT*IN?.

19 UA2 Input TTL Switch output 2:

HIGH/LOW: Can be set to “high” or “low” via the command

AT**OUT2 to switch off an external device.

The current status is displayed using AT**OUT? when queried.

15

Technical Data i-modul GPRS 3.1 serial

2.10.2 Reset

Pin Signal Type Level Description

11 Reset Input TTL Reset

Normal state: 1 (internal pull-up resistor)

RESET active: 0 (short circuit with GND)

Minimum RESET time: 3s

Note:

Besides functioning as hardware reset, the pin reset has to more

functions:

1. Restore the factory settings of the i-modul GPRS 3.1 serial.

Within 10 seconds, at least 5 low impulses with a duration

of 100 to 500 ms must be applied at the input. After 10

seconds, the i-modul GPRS 3.1 serial resets all parameters

of the extended INSYS commands to the factory settings

(except AT**PIN) and restarts.

2. Switching to online command mode:: Within 10 seconds,

exactly 2 low impulses with a duration of 100 to 500 ms

must be applied at the input. The reaction of i-modul GPRS

3.1 serial corresponds to the input of +++ or a DTR drop for

the setting AT&D1.

16

i-modul GPRS 3.1 serial Technical Data

2.10.3 Indication Signals

Pin Signal Type Level Description

13 OH~ Output TTL Normal state: 1

Connection setup / connection / termination: 0

15 RI~ Output TTL Normal state: 1

Data call (CSD): const. 0 from the first RING to

the Connection acceptance

Voice call: per RING 1 sec. low 0 and 4 sec. 1

25 STATU

S

LED

Output

- - - Output for directly connecting a LOW power LED.

An internal series resistance (820 Ohm) against GND is available.

On: low impedance against GND

Off: high impedance against GND

Signaling:

Initialization phase (boot):

Slow blinking (500 ms on, 500 ms off)

Normal operation (update interval can be set with AT**GSMREQ):

 Always off: i-modul GPRS 3.1 serial not logged into the GSM

network

 Slow flashing (100 ms on, 1900 ms off): i-modul GPRS 3.1 serial

logged into the GSM network

Connection setup using the integrated TCP/IP stack:

 Fast flashing (100 ms on, 900 ms off): PPP dial-in successful, IP

address received from provider (see also "TCP Listen mode,

Chapter 3.4)

 Always on: TCP connection to the remote terminal is active.

17

Technical Data i-modul GPRS 3.1 serial

Pin Signal Type Level Description

31 SIG-

NAL

LED

Output

- - - Output for directly connecting a LOW power LED.

An internal series resistance (820 Ohm) against GND is available.

On: low impedance against GND

Off: high impedance against GND

Signaling:

Indicates by blinking the level of the received GSM signal field

strength (corresponds to the commands AT+CSQ or

AT**SIGNAL?). The update interval can be set with AT**GSMREQ.

On/off time Corresponds to GSM

field strength

Always on 25 .. 31

60 / 60 ms 23 .. 24

140 / 140 ms 21 .. 22

260 / 260 ms 19 .. 20

380 / 380 ms 17 .. 18

500 / 500 ms 15 .. 16

1000 / 1000 ms 13 .. 14

Always off 0 .. 12, 99

18

i-modul GPRS 3.1 serial Technical Data

Pin Signal Type Level Description

32 SYNC LED

Output

- - - Output for directly connecting a LOW power LED.

An internal series resistance (820 Ohm) against GND is available.

On: low impedance against GND

Off: high impedance against GND

Signaling:

The signaling type can be defined with the command AT^SSYNC.

AT^SSYNC=0 (default):

Indication of the GSM/GPRS transmit burst.

In this mode, the pin SYNC 180 µs is switched on prior to the

transmit burst and remains on during the

transmit burst.

First of all, this generally allows the indication of any sending

activity of the GSM/GPRS engine via LEDs.

Secondly, this will enable the user to determine the periods when

the power demand is higher, to make sufficient power available to

the i-modul GPRS 3.1 serial .

AT^SSYNC=1:

Always off:

GSM/GPRS engine off or in power down mode (AT^SMSO)

600 ms on / 600 ms off:

The device has not been logged into the GSM network (e.g. network

loss, no SIM card inserted or no PIN entered)

75 ms on / 3 s off:

Device has been logged into the GSM network

75 ms on / 75 ms off / 75 ms on / 3 s off:

One or more GPRS contexts activated

500 ms on / 25 ms off:

GPRS data transfer (Rx/Tx)

Always on:

Voice call: Connection established

CSD call: Connection setup,

Connection established, connection

termination

19

Technical Data i-modul GPRS 3.1 serial

2.11 Internal Design

For the i-modul GPRS 3.1 serial, a µcontroller is placed in series between the

external serial interface and the GSM/GPRS engine.

All commands sent to the i-modul GPRS 3.1 serial via the serial interface are

first received and evaluated by the µcontroller.

If the command results in just one action by the µcontroller, the response to

the application (e.g. OK) is created directly by the µcontroller.

If the GSM/GPRS engine is activated while commands are entered, the re-

sponse to the application is determined by the engine; in this case, the µcon-

troller will just relay them.

During CSD calls or standard GPRS connections the µcontroller relays the

data transparently in both directions.

When using the integrated TCP/IP stacks (TCP transparent) of the µcontroller,

the data from the µcontroller is packed into the according protocol elements,

sent via the GSM/GPRS engine and vice versa.

The periodically performed status queries (AT**GSMREQ) and evaluations of

incoming SMS occur internally on another interface; they will not have an ef-

fect on the communication between the application and the i-modul GPRS

3.1 serial.

20

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Insys i-modul GPRS serial Designer’s Guide

Insys i-modul GPRS serial Designer’s Guide

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