Ublox EVK-U201SARA User manual

SARA-U2 series EVK
Cellular evaluation kit
User Guide
Abstract
This guide explains how to set up the EVK-U201SARA, EVK-U26
and EVK-U27 Evaluation Kits to begin evaluating the u-blox
SARA-U2 series HSPA/UMTS/EGPRS/GSM cellular modules.
www.u-blox.com
UBX-14001743 - R05

SARA-U2 series EVK - User Guide
UBX-14001743 - R05
Page 2 of 21
Document Information
Title
SARA-U2 series EVK
Subtitle
Cellular evaluation kit
Document type
User Guide
Document number
UBX-14001743
Revision and date
R05
31-Oct-2017
Disclosure restriction
Product Status
Corresponding content status
Functional Sample
Draft
For functional testing. Revised and supplementary data will be published later.
In Development /
Prototype
Objective Specification
Target values. Revised and supplementary data will be published later.
Engineering Sample
Advance Information
Data based on early testing. Revised and supplementary data will be published later.
Initial Production
Early Prod. Information
Data from product verification. Revised and supplementary data may be published later.
Mass Production /
End of Life
Production Information
Final product specification.
This document applies to the following products:
Name
Type number
Modem version
Application version
PCN reference
EVK-U201SARA
EVK-U201SARA-0-00
23.60
A01.06
UBX-17058162
EVK-U26
EVK-U26-00S-01
23.20
A01.01
UBX-15013844
EVK-U26-00S-02
23.41
A01.01
UBX-15020745
EVK-U27
EVK-U27-00S-01
23.20
A01.01
UBX-16006754
EVK-U27-00S-02
23.41
A01.01
UBX-15020745
u-blox reserves all rights to this document and the information contained herein. Products, names, logos and designs described herein may in
whole or in part be subject to intellectual property rights. Reproduction, use, modification or disclosure to third parties of this document or
any part thereof without the express permission of u-blox is strictly prohibited.
The information contained herein is provided “as is” and u-blox assumes no liability for the use of the information. No warranty, either
express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular purpose
of the information. This document may be revised by u-blox at any time. For most recent documents, visit www.u-blox.com.
Copyright © 2017, u-blox AG
Trademark Notice
u-blox is a registered trademark of u-blox Holding AG in the EU and other countries.
Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.
All other registered trademarks or trademarks mentioned in this document are property of their respective owners.

SARA-U2 series EVK - User Guide
UBX-14001743 - R05 Contents
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Contents
Contents..............................................................................................................................3
1Starting up....................................................................................................................4
1.1 EVK-U2x overview ............................................................................................................................... 4
1.2 EVK-U2x block diagram ....................................................................................................................... 5
1.3 Switches, jumpers and buttons ............................................................................................................ 5
1.4 Connectors.......................................................................................................................................... 6
1.5 LEDs .................................................................................................................................................... 6
1.6 EVK-U2x pin-out.................................................................................................................................. 7
1.7 Software installation ............................................................................................................................ 7
1.8 Board setup ......................................................................................................................................... 8
1.9 Enabling verbose error result codes...................................................................................................... 9
1.10 PIN code insertion (when required) ...................................................................................................... 9
1.11 Registration on a cellular network........................................................................................................ 9
1.12 Audio codec configuration and enabling / disabling........................................................................... 10
1.13 Switching off the EVK-U2x ................................................................................................................ 10
Appendix ..........................................................................................................................11
ASetting up AT terminal applications for communication with EVK-U2x ................11
BSetting up cellular packet data connection on PC....................................................12
B.1How to install and configure a low data rate modem connection ...................................................... 12
B.2 How to install and configure a high data rate modem connection ..................................................... 15
CExamples of AT commands........................................................................................17
C.1 Voice call ........................................................................................................................................... 17
C.2 Data call (CSD mode)......................................................................................................................... 17
C.3 SMS management ............................................................................................................................. 18
C.4 Internet connection in GPRS mode (using external TCP/IP stack) ........................................................ 18
C.5 Internet connection in GPRS mode (using internal TCP/IP stack)......................................................... 18
C.6 Enable communication between cellular and GNSS modules ............................................................. 19
C.7 Read NMEA messages (example: GLL)................................................................................................ 19
C.8 GNSS AssistNow ................................................................................................................................ 19
Declaration of conformities.............................................................................................20
Related documents ..........................................................................................................20
Revision history................................................................................................................20
Contact..............................................................................................................................21

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1Starting up
1.1 EVK-U2x overview
The EVK-U201SARA, EVK-U26 and EVK-U27 are powerful and easy-to-use tools that make evaluating the u-blox
SARA-U201, SARA-U260 and SARA-U270 HSPA/UMTS/EGPRS/GSM cellular modules simple.
The evaluation kits differ depending on which SARA-U2 series module version is mounted:
SARA-U201 module is provided on the EVK-U201SARA evaluation kit
SARA-U260 module is provided on the EVK-U26 evaluation kit
SARA-U270 module is provided on the EVK-U27 evaluation kit
This document identifies all the evaluation kits as EVK-U2x.
This section describes the main connections and settings required to get started.
EVK-U2x can also be used to evaluate other SARA-U2 series modules as SARA-U280.
See the SARA-U2 series Data Sheet [2] and SARA-G3 / SARA-U2 series System Integration Manual [3] for
the features supported by u-blox SARA-U2 series HSPA/UMTS/EGPRS/GSM cellular modules.
SIM card holder
J300
Cellular reset
SW303
Cellular power-on
SW302
GND
9 –18 V
Power input
J400
Cellular
adapter board
DL400
Main power switch
SW400
DL401
Cellular
antenna connector
J101
SARA-U2
cellular module
DIL B2B connector
J100
DIL B2B connector
J103
GND
Cellular native USB
J313
GNSS
antenna connector
J103
GNSS module
GNSS
adapter board
Cellular VCC
supply jumper
J404
Cellular USB
(UART)
J501
Cellular RS232
(UART)
J500
DL501DL403 DL405
GNSS USB
J102
SW403
SW401
DL404
SW300
SW304
SW204
SW510
DS300 Headset jack
J303
DS132
DS118DS124
DS121
DS107
DS105
DS109
DS103
DS501
DS500
GND
GND
Figure 1: EVK-U2x evaluation kit overview

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1.2 EVK-U2x block diagram
Figure 2 shows the main interfaces and internal connections of the EVK-U2x:
SIM
card holder
(J300)
Reset
(SW303)
Power-on
(SW302)
Native USB
(J313)
SARA-U2 adapter board
SARA-U2
module
42-pin DIL B2B connector (J100) 42-pin DIL B2B connector (J103)
EVB-WL3
GNSS
module
GNSS adapter board
RF
USB
UART
converter
Cellular USB
(UART)
(J501)
Cellular RS232
(UART)
(J500)
RS232
UART
converter UART
MiniUSB/DB9
switch
(SW403)
On-Board/B2B
switch
(SW401)
USB
Headset jack
(J303)
I2C
Cellular
antenna
(J101)
Codec
Step -Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
GPIO2/3/4
GNSS switch
(SW304)
Figure 2: EVK-U2x block diagram
The EVK-U2x is formed by three boards:
The lower one, called EVB-WL3, contains the power supply and other peripherals for the SARA-U2 series
cellular module (SIM card holder, Reset button and Power-on button).
The cellular adapter board, called ADP-U201SARA, ADP-U260 or ADP-U270, contains the SARA-U201, the
SARA-U260 or the SARA-U270 cellular module, the audio codec, the antenna connector and the USB
connector for the cellular module.
The GNSS adapter board, called ADP-GNSS, contains the u-blox GNSS module, the LDO supply regulator,
the GNSS antenna connector and the USB connector for the GNSS module.
The boards are connected by means of male header board-to-board connectors provided on the bottom of the
adapter boards and their corresponding female connectors provided on top of the lower board. The USB
interface of the cellular module is available on the native USB connector on the cellular adapter board, while the
other peripherals are available on the Dual-In-Line male Board-to-Board connectors provided on the top layer of
the cellular Adapter Board (J100, J103), which are pin-to-pin compatible to the connectors on the bottom layer
of the adapter board.
1.3 Switches, jumpers and buttons
Function
Description
Name
Board
Main Power Switch
Switch to power on / off the whole evaluation kit
SW400
EVB
Cellular VCC
Jumper socket to provide the 3.8 V supply to the cellular module VCC input
J404
EVB
Cellular Power-on
Push button to switch-on the cellular module
SW302
EVB
Cellular Reset
Push button to reset the cellular module
SW303
EVB
Cellular UART detach
Slide switch to attach / detach cellular module UART from USB and RS232 connectors:
when detached, UART signals available only on the DIL B2B connector on ADP board
SW401
EVB
Cellular UART routing
Slide switch to select cellular module UART routing on USB or on RS232 connector
SW403
EVB
Cellular GPIO detach
Slide switch to attach / detach the cellular module GPIOs, SIM_DET from peripherals:
when detached, the signals are available only on the DIL B2B connector on ADP board
SW300
EVB
Cellular GNSS detach
Slide switch to attach / detach the cellular module to the GNSS module (GPIO2-3-4):
when detached, the signals are available only on DIL B2B connector on ADP board
SW304
EVB
GNSS V_BCKP
Slide switch to connect / disconnect backup battery to V_BCKP pin of GNSS module
SW204
EVB
Table 1: EVK-U2x switches and buttons description

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1.4 Connectors
Function
Description
Name
Board
9 - 18 V Power Input
Connector for the AC / DC power adapter of the EVK
AC: 100-240 V, 0.8 A, 50-60 Hz / DC: +12 V, 2.5 A
IEC 60417-5172
Class II equipment
J400
EVB
Cellular antenna
SMA connector for the cellular module antenna
J101
ADP-U2xx
SIM card holder
SIM card holder
J300
EVB
Cellular native USB
Mini USB connector for cellular module native USB interface
J313
ADP-U2xx
Cellular USB (UART)
Mini USB connector for cellular module UART interface converted as USB interface
J501
EVB
Cellular RS232 (UART)
DB9 connector for cellular module UART interface converted as RS232 interface
J500
EVB
Cellular headset
Audio headset jack connector for cellular module audio interface
J303
EVB
DIL B2B headers
Dual-In-Line Board-to-Board connectors for cellular module interfaces
J100, J103
ADP-U2xx
GNSS antenna
SMA connector for the GNSS module antenna (GNSS Antenna)
J103
ADP-GNSS
GNSS USB
Mini USB connector for GNSS module USB interface
J102
ADP-GNSS
GNSS backup battery
Backup battery socket for the GNSS module (under GNSS adapter board)
BT200
EVB
GND
Ground terminals for probe reference
J402/3/5/6
EVB
Table 2: EVK-U2x connector description
Caution! In the unlikely event of a failure in the internal protection circuitry there is a risk of an
explosion when charging fully or partially discharged battery. Replace battery when it no
longer has sufficient charge for unit operation. Control the battery before use if the device has
not been used for an extended period of time.
Caution! Risk of explosion if battery is replaced with an incorrect type. Dispose of used
batteries according to the instructions!
1.5 LEDs
Function
Description
LED #
Board
Color
Main Power
Power supply plugged in the 9 - 18 V Power Input
DL401
EVB
Cellular VCC supply
Cellular module supplied. Main Power Switch must be switched on
DL400
EVB
Cellular native USB
USB cable plugged in Cellular native USB connector
DS300
ADP-U2xx
Cellular USB
USB cable plugged in Cellular USB connector for UART access
DL501
EVB
Cellular USB / UART
Green light is activated when UART is routed to Cellular USB connector
Red light blinks at UART TX or RX data on Cellular USB connector
DL403
EVB
Cellular RS232 / UART
Green light is activated when UART is routed to Cellular RS232 connector
Red light blinks at UART TX or RX data on Cellular RS232 connector
DL405
EVB
Cellular UART detach
UART signals are available only on the DIL B2B connector on ADP board
DL404
EVB
Cellular RI indicator
RI line turns ON (active low)
DS501
EVB
Cellular CTS indicator
CTS line turns ON (active low)
DS500
EVB
Cellular GPIO1 indicator
Green light is activated when cellular GPIO1 is high
DS107
EVB
Cellular GPIO2 indicator
Green light is activated when cellular GPIO2 is high
DS105
EVB
Cellular GPIO3 indicator
Green light is activated when cellular GPIO3 is high
DS109
EVB
Cellular GPIO4 indicator
Green light is activated when cellular GPIO4 is high
DS103
EVB
GNSS VCC supply
GNSS module supply is turned ON
DS118
ADP-GNSS
GNSS USB
USB cable plugged in GNSS USB connector
DS124
ADP-GNSS
GNSS timepulse
Pulses at 1 Hz when valid GNSS fix
DS121
ADP-GNSS
Cellular / GNSS DDC
Cellular / GNSS module communication over DDC (I2C) interface
DS132
ADP-GNSS
Table 3: EVK-U2x LEDs description

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1.6 EVK-U2x pin-out
DIL B2B connector
Name / Pin Number
SARA-U2
Signal Name
SARA-U2
Pin N°
SARA-U2
Pin N°
SARA-U2
Signal Name
DIL B2B connector
Name / Pin Number
J103 Pins 7-8-9-10
GND
1
64
GND
J103 Pins 7-8-9-10
J103 Pin 3
V_BCKP
2
63
GND
J103 Pins 7-8-9-10
J103 Pins 7-8-9-10
GND
3
62
ANT_DET
J100 Pin 36
J103 Pin 36
V_INT
4
61
GND
J103 Pins 7-8-9-10
J103 Pins 7-8-9-10
GND
5
60
GND
J103 Pins 7-8-9-10
J103 Pins 18
DSR
6
59
GND
J103 Pins 7-8-9-10
J103 Pins 17
RI
7
58
GND
J103 Pins 7-8-9-10
J103 Pins 11
DCD
8
57
GND
J103 Pins 7-8-9-10
J103 Pin 12
DTR
9
56
ANT
Not available
J103 Pin 13
RTS
10
55
GND
J103 Pins 7-8-9-10
J103 Pin 14
CTS
11
54
GND
J103 Pins 7-8-9-10
J103 Pin 15
TXD
12
53
VCC
J100 Pins 7-8-9-10
J103 Pin 16
RXD
13
52
VCC
J100 Pins 7-8-9-10
J103 Pins 7-8-9-10
GND
14
51
VCC
J100 Pins 7-8-9-10
J103 Pin 29
PWR_ON
15
50
GND
J103 Pins 7-8-9-10
J103 Pin 33
GPIO1
16
49
RSVD
Not available
Not available
VUSB_DET
17
48
RSVD
Not available
J100 Pin 26
RESET_N
18
47
RSVD
Not available
J103 Pin 24
CODEC_CLK
19
46
RSVD
Not available
J103 Pins 7-8-9-10
GND
20
45
RSVD
Not available
J103 Pins 7-8-9-10
GND
21
44
RSVD
Not available
J103 Pins 7-8-9-10
GND
22
43
GND
J103 Pins 7-8-9-10
J103 Pin 31
GPIO2
23
42
SIM_DET
J103 Pin 23
J103 Pin 32
GPIO3
24
41
VSIM
J100 Pin 13
J103 Pins 25
GPIO4
25
40
SIM_RST
J100 Pin 16
J100 Pin 21
SDA
26
39
SIM_IO
J100 Pin 14
J100 Pin 20
SCL
27
38
SIM_CLK
J100 Pin 15
Not available
USB_D-
28
37
I2S_RXD
J100 Pin 23
Not available
USB_D+
29
36
I2S_CLK
J100 Pin 22
J103 Pins 7-8-9-10
GND
30
35
I2S_TXD
J100 Pin 24
Not available
RSVD
31
34
I2S_WA
J100 Pin 25
J103 Pins 7-8-9-10
GND
32
33
RSVD
J100 Pin 30
Table 4: Cellular module interfaces availability on the 42-pin Dual-In-Line Board-to-Board connectors on the adapter board
1.7 Software installation
The USB driver can be downloaded from the Web; see the Quick Start card [5] for the URL. Save the executable
file to any location of the hard drive on the computer. The installation can be started by running the executable
file on the computer running the Windows operating system.

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1.8 Board setup
1. Insert a SIM card into the SIM card holder (J300).
2. Connect the cellular antenna provided with the evaluation kit box to the Cellular antenna SMA connector
(J101 on ADP-U2xx, RF input/output for transmission and reception of 3G/2G RF signals).
3. If the GNSS functionality is required, connect the GNSS antenna provided with the evaluation kit box to the
GNSS antenna SMA connector (J103 on ADP-GNSS). Put the GNSS antenna in a place with good sky view.
4. Connect the AC / DC +12 V power adapter provided with the Evaluation Kit box to 9 –18 V Power Input
connector (J400 on EVB). LED DL401 lights blue.
5. Be sure to provide a jumper socket on the Cellular VCC supply jumper (J404). This provides the connection
from the 3.8 V output of the supply circuit on the EVB to the VCC input of the module
6. To enable the whole board power supply, turn the Main Power switch (SW400 on EVB) to ON position. LED
DL400 lights green. The cellular module switches on.
If the cellular module has been powered off by AT+CPWROFF command, press the Cellular Power-On
button (SW302 on EVB) or the Cellular Reset button (SW303 on EVB) to switch on the module again.
7. For communication via the UART interface of the cellular module, the following connections are allowed and
can be alternatively enabled in a mutually exclusive way (see Table 5 for switch position and LED status):
a. Connect a USB cable to the mini USB connector (Cellular USB, J501 on EVB), LED DL501 lights blue
b. Connect an RS232 cable to DB9 connector (Cellular RS232, J500 on EVB)
When a USB cable is connected to the mini USB connector, two COM ports are enabled in Windows (the
numbering of the COM ports can be seen via the Windows Device Manager). The serial port for AT
commands is available over the first numbered COM port opened by the driver.
Type of connections
SW401
SW403
LED
Access to cellular UART over the Cellular USB (UART) mini USB connector (J501)
ON BOARD
MINIUSB
DL403
Access to cellular UART over the Cellular RS232 (UART) DB9 connector (J500)
ON BOARD
DB9
DL405
Access to cellular UART on DIL Board-to-Board connector on the adapter board:
cellular UART detached from USB (UART) J501 and RS232 (UART) J500 connectors
B2B
Do not care
DL404
Table 5: Cellular UART interface configuration and routing
8. For communication via the USB interface of the cellular module, connect a USB cable to Cellular Native
USB connector (J313 on ADP). LED DL300 on ADP lights blue.
After the end of the module boot, the COM ports listed in Table 6 are enabled by the Windows USB driver
(details as the numbering of the ports can be seen via the Windows Device Manager)1:
Parameter
Type
Remarks
u-blox Modem USB1 AT and data
Modems
AT command interface and data communication
u-blox Modem USB2 AT and data
Ports (COM & LPT)
AT command interface and data communication
u-blox Modem USB3 AT and data
Ports (COM & LPT)
AT command interface and data communication
u-blox Modem USB4 GNSS
Ports (COM & LPT)
GNSS tunneling
u-blox Modem USB5 Primary Log
Ports (COM & LPT)
Diagnostic purpose
u-blox Modem USB6 Secondary Log
Ports (COM & LPT)
Diagnostic purpose
u-blox Modem USB7 SAP
Ports (COM & LPT)
Remote SIM Access profile
Table 6: Cellular USB interface configuration
1A message of “driver installation fail” may appear on Windows if the USB cable has been connected before the end of the module boot,
but this can be ignored as the normal operating functionality of the module will be anyway available after the end of the module boot.

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When using USB drivers for Windows, if a dial-up connection is created and then started on the “Modems
Type” interface (USB1), the following commands are issued to the module through USB1 during the dial-
up initialization phase:
AT&F&D2&C1S0=0<cr> ATE0V1<cr> AT\Q0<cr>
These commands reset all profile parameters to the factory-programmed values. This is strictly related to
the provided Windows modem driver, and is not controlled by the FW module. If needed, profile
parameters other than the factory-programmed values must be set after the dial up connection is
disconnected.
9. Run an AT terminal application (e.g. the u-blox m-center tool) on proper PC COM port, with these settings:
oData rate: 115200 b/s
oData bits: 8
oParity: N
oStop bits: 1
oFlow control: HW
See Appendix A for how to configure the u-blox m-center AT terminal for Windows.
10. Connect the headset provided with the evaluation kit box to the Headset jack connector (J303 on EVB), if
the audio functionality is required.
1.9 Enabling verbose error result codes
Command sent by DTE (user)
DCE response (module)
Description
AT+CMEE=2
OK
Enables the cellular module to report verbose error result codes.
1.10PIN code insertion (when required)
Command sent by DTE (user)
DCE response (module)
Description
AT+CPIN="8180"
OK
Enter the PIN code, if needed (enter the PIN of the SIM card –8180 is
written here as an example).
AT+CLCK="SC",0,"8180"
OK
Unlock the PIN at power on (the last parameter is the PIN of the SIM card
–8180 is written here as an example).
AT+CLCK="SC",1,"8180"
OK
Lock the PIN at power on (the last parameter is the PIN of the SIM card –
8180 is written here as an example).
1.11Registration on a cellular network
Command sent by DTE (user)
DCE response (module)
Description
AT+CREG?
+CREG: 0, 1
OK
Verify the network registration.
AT+COPS=0
OK
Register the module on the network.
The cellular module automatically registers itself on the cellular network.
This command is necessary only if the automatic registration failed
(AT+CREG? returns 0,0).
AT+URAT=1,2
OK
Select radio access technology: 1=GSM/UMTS dual mode; 2=UMTS.
AT+COPS?
+COPS: 0,0,"I TIM",2
OK
Read the operator name; 2 means radio access UMTS.

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1.12Audio codec configuration and enabling / disabling
Command sent by DTE (user)
DCE response (module)
Description
AT+UGPIOC?
+UGPIOC:
16,255
23,3
24,4
25,5
34,12
35,12
36,12
37,12
42,7
OK
Check the I2S pins (<gpio_id> = 34, 35, 36, 37) configuration: they must
be configured as I2S digital audio interface (<gpio_mode> = 12) to
provide voice capability at the EVB headset jack connector using the
external audio codec mounted on the EVK-U2x.
AT+USPM?
+USPM: 0,0,0,0,2
OK
Check the audio path mode setting: both the <main_uplink> path and
the <main_downlink> path must be configured as I2S digital audio
interface (e.g. <main_uplink> = 0, <main_downlink> = 0) to provide
voice capability at the EVB headset jack connector using the external
audio codec mounted on the EVK-U2x.
AT+UEXTDCONF=0,1
OK
The audio codec configuration is enabled at any subsequent re-boot of
the module, with the execution of the following actions:
Set module CODEC_CLK pin to provide 13 MHz master clock to the
external Maxim MAX9860 audio codec mounted on EVK-U2x
Open the DDC logical channel connected to the external codec
Send, via DDC, the specified byte sequence for codec configuration
Close the DDC logical channel connected to the external codec
Note that the AT+UEXTDCONF setting must be saved in the module’ non
volatile memory by switching off the module with AT+CPWROFF to be in
use at any subsequent re-boot of the module.
AT+UEXTDCONF=0,0
OK
The audio codec configuration is disabled at any subsequent re-boot of
the module.
Note that the AT+UEXTDCONF setting must be saved in the module’ non
volatile memory by switching off the module with AT+CPWROFF to be in
use at any subsequent re-boot of the module.
1.13Switching off the EVK-U2x
To switch off the EVK-U2x, send the AT+CPWROFF command. Make sure to use this command before switching
off the main power, otherwise settings and configuration parameters may not be saved on the EVK-U2x.

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Appendix
ASetting up AT terminal applications for
communication with EVK-U2x
The u-blox m-center cellular module evaluation tool is a powerful platform for evaluating, configuring and
testing u-blox cellular modules. m-center includes an AT commands terminal for communication with the device
and can be downloaded free-of-charge from our website (http://www.u-blox.com).
1. Follow the board setup instructions in section 1.8 to provide all the required connections and switching on
the cellular module.
2. Run the m-center tool: after the m-center start-up, the Home page appears.
3. On the Home page, set up the AT COM port; for
the setting values see section 1.8.
Check with Windows Device Manager to find out
which COM port is being used by EVK-U2x.
Figure 3: m-center Home page
4. Enable the connection to u-blox cellular module by
clicking on the Connect button.
5. Retrieve the module and network information by
clicking on the Get Info button.
6. The module information is retrieved and displayed
on the Home page.
7. Click on the AT Terminal button, found at the
upper right of the Home page. A new window
opens and the AT command terminal is now ready
for communication with EVK-U2x.
Figure 4: AT Terminal window
8. The AT terminal is ready to use.
For the complete list of AT commands supported
by the modules and their syntax, see the u-blox AT
Commands Manual [1].
For more information on using the m-center tool,
see the m-center User Guide [4].

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BSetting up cellular packet data connection on PC
This section describes how to set up a packet data connection with Windows 7 operating systems (for PC) and
EVK-U2x, using the TCP/IP stack of the PC (external TCP/IP stack).
The following examples describe how to install and configure two different kinds of modem on Windows:
1Low data rate modem, over the UART interface of the cellular module connected to the Windows PC by the
Cellular USB connector (J501 on EVB) or the Cellular RS232 connector (J500 on EVB)
2High data rate modem, over the native USB interface of the cellular module connected to the Windows PC
by the Cellular Native USB connector (J313 on ADP)
B.1 How to install and configure a low data rate modem connection
This example describes how to install and configure a low data rate packet data connection on a PC with
Windows 7 operating system. This uses the TCP/IP stack of the PC over the UART interface of the cellular module
connected to the Windows PC by the Cellular USB connector (J501 on EVB) or the Cellular RS232 connector
(J500 on EVB).
1. Follow the board setup instructions in section 1.8 to provide the required connections with EVK-U2x.
2. Select “Control panel > Phones and Modem > Modems >
Add”. This opens the Install New Modem Wizard.
3. Select the Don’t detect my modem checkbox.
4. Select the Standard Modem (33600 b/s).

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5. Set the COM-port on which the modem will be installed.
6. Select “Control panel > Phones and Modem > Modems >
Standard Modem 33600 bps Modem > Properties”.
7. Select “Change Settings > Advanced”.
8. Add APN settings command (APN shown is just an
example. Make sure to have the correct APN defined by
the network operator).
9. Click on Change Default Preferences.
10. Click on OK twice and the new connection is now ready to
be configured.
11. To configure a new connection, select “Control Panel
> Network and Sharing Center > Set up a new
connection or network”.

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12. Select the modem, if requested (the question appears
only if more than one modem is available).
13. Enter parameters for dial-up connection:
The module telephone number (*99***1#)
The specific GPRS account information for the
network operator
A name for the new connection (e.g. “u-blox
GPRS Connection“)
14. The packet data connection is now ready to be used
with the EVK-U2x. To check the connection, start a
browser.
Consult the cellular network operator for username and password. In most cases, these can be left empty.

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B.2 How to install and configure a high data rate modem connection
This example describes how to install and configure a high data rate packet data connection on a PC with the
Windows 7 operating system, using the TCP/IP stack of the PC, over the native USB interface of the cellular
module connected to the Windows PC by the Cellular Native USB connector (J313 on ADP).
1. Follow the board setup instructions in section 1.8 to provide the required connections with EVK-U2x.
2. Select: “Control Panel > Network and
Internet > Network and Sharing Center
> Setup a new connection or network”
This opens the “Choose a connection
option” Wizard.
3. Select Set up a dial-up connection.
Click on Next.

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4. Select u-blox Modem USB1 AT and
Data #X (X=7 in the picture).
5. Enter the modem telephone number
(*99***1#), select Allow other people
to use this connection and click
Connect to finalize the procedure.
Consult the cellular network operator for username and password. In most cases, these can be left empty.

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CExamples of AT commands
For the complete description and syntax of supported AT commands, see the u-blox AT commands Manual [1].
C.1 Voice call
Incoming voice call:
Command sent by DTE (user)
DCE response (module)
Description
AT+CLIP=1
OK
Activation of Caller line ID presentation.
Call the phone number of the SIM in the
device.
RING
Incoming call.
+CLIP: "[phone]",145,,,,0
RING
+CLIP: "[phone]",145,,,,0
Presentation of Caller ID: [phone]
is written here as example.
ATA
OK
Answer to the voice call.
ATH
OK
Talk to the caller using the headset.
Hang up.
Outgoing voice call:
Command sent by DTE (user)
DCE response (module)
Description
AT+CLIP=1
OK
Activation of caller line ID presentation.
ATD+3930012345678;
OK
Outgoing voice call ([phone] is
written here as example).
The voice call is accepted from the network.
ATH
OK
Hang up.
C.2 Data call (CSD mode)
Command sent by DTE (user)
DCE response (module)
Description
AT+CBST=7,0,1
OK
Configure the data call to 9600 RLP analog.
ATD+3930012345678
CONNECT 9600
~ }#À!}!}1} }4}”}&} }*} }
}%}&ú…}<}’}”}(}”}/Ë~~ }#À!}!}2}
}4}”}&}
}*} } }%}&ú…}<}’}”}(}”Åv~~
}#À!}!}3} }4}”}&} }*} }
}%}&ú…}<}’}”}(}”Œå~ +++
OK
Outgoing data call ([phone] is
written here as example).
Connect to the remote analog modem.
ATH
OK
Hang up.
AT+CBST=71,0,1
OK
Set data call to 9600 RLP V.110 ISDN.
ATD+3930012345678
Outgoing data call ([phone] is
written here as example).
CONNECT 9600
~ }#À!}!Œ} }4}”}&} }*} }
}%}&ú„Ej}’}”}(}”KÌ~~ }#À!}!•}
}4}”}&} }*}
} }%}&ú„Ej}’}”}(}”}”_~~ }#À!}!Ž}
}4}”}&} }*} }
}%}&ú„Ej}’}”}(}”Èâ~ +++
OK
Connect to the remote ISDN modem.
ATH
OK
Hang up.

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C.3 SMS management
Command sent by DTE (user)
DCE response (module)
Description
AT+CMGF=1
OK
Set the text mode as the format that will be
used. To be set before of the first operation.
AT+CMGS="[phone]"
SMS TEXT MESSAGE
0123456789<CTRL-Z>
>
+CMGS: 0
OK
Send the 1st SMS ([phone] is
written here as example).
AT+CMGS=”[phone]”
>
Send the 2nd SMS ([phone] is
written here as example).
SMS TEXT MESSAGE
0123456789<CTRL-Z>
+CMGS: 1
OK
AT+CMGL
+CMGL:302,"REC
UNREAD","[phone]",,"05/09
/27,16:40:36+08"
SMS TEXT MESSAGE 0123456789
OK
List all the incoming SMSes
([phone] is written here as
example).
C.4 Internet connection in GPRS mode (using external TCP/IP stack)
Command sent by DTE (user)
DCE response (module)
Description
AT+CGATT?
+CGATT: 1
OK
Check if the cellular module is attached to
GPRS service (1 –attached, 0 –detached).
AT+CGDCONT=1,"IP","uni.tim.it"
OK
Define the PDP context parameters.
AT+CGDCONT?
+CGDCONT: 1,"IP","my apn","0.0.0
.0",0,0
OK
ATD*99***1#
CONNECT
Initiate the GPRS connection.
+++
NO CARRIER
Disconnect with +++ sequence.
C.5 Internet connection in GPRS mode (using internal TCP/IP stack)
Command sent by DTE (user)
DCE response (module)
Description
AT+UPSD=0,1,"my apn"
OK
Configure PDP-context parameters.
Make sure to have the correct APN.
AT+UPSD=0,2,"my user-name"
OK
Username and password depend on the
mobile operator used. In most cases these
are not required. Simply use space or omit
these commands.
AT+UPSD=0,3,"my password"
OK
AT+UPSD=0
(configuration parameters)
Check the configuration.
AT+UPSDA=0,1
OK
Store configuration in non-volatile memory
(NVM).
AT+UPSDA=0,3
OK
Activate the PDP context.
Verify connection and PDP-context:
Command sent by DTE (user)
DCE response (module)
Description
AT+UPSND=0,0
(IP address)
Check IP addresses assigned.
AT+UPSND=0,1
(IP address of DNS)
Check DNS assigned.
AT+UDNSRN=0,"www.u-blox.com"
195.34.89.137
or 195.34.89.138
OK
Example: resolve DNS name.

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C.6 Enable communication between cellular and GNSS modules
Command sent by DTE (user)
DCE response (module)
Description
AT+UGPS=1,0
OK
Enable communication. On the ADP-GNSS:
LED DS118 lights green, LED DS132 blinks.
C.7 Read NMEA messages (example: GLL)
Several NMEA messages via cellular USB or UART can be read. The example below shows how to read a GLL
message to get the latest available geographic position as latitude/longitude. For the full list of NMEA messages
that can be read, see the u-blox AT commands manual [1].
Command sent by DTE (user)
DCE response (module)
Description
AT+UGGLL=1
OK
Enable the GLL message.
AT+UGGLL?
+UGGLL: (state),(GLL-msg)
OK
Or
+UGGLL: (state), Not Available
OK
Read the message.
The last available GLL message is displayed.
C.8 GNSS AssistNow
GNSS AssistNow Online:
Command sent by DTE (user)
DCE response (module)
Description
AT+UGAOP="agps.u-blox.com",46434
,1000,0
OK
Insert server data - the parameters are
written as an example.
AT+UPSD=0,1,"web.omnitel.it"
OK
Configure the GPRS connection -
"web.omnitel.it" is written as APN example.
AT+UGPS=1,4
OK
Start the GNSS. No need to do this if this is
already done before.
AT+UGAOS=4
OK
Send data to the u-blox server.
GNSS AssistNow Offline:
Command sent by DTE (user)
DCE response (module)
Description
AT+UGAOF="http://alp.u-blox.com/
current_14d.alp",0,1,3
OK
Insert server data - the parameters are
written as an example.
AT+UGPS=1,2
OK
Start the GNSS (the default interface is
DDC).

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Declaration of conformities
The equipment is intended for indoor usage. It is the user’s duty to verify if further restrictions apply, such as
when used in airplanes, hospitals or hazardous locations (petrol stations, refineries…).
Any changes or modification made to this equipment will void its compliance to the safety requirements.
Maintenance, inspections and/or reparations of the EVK-U2x shall be performed by u-blox AG.
Related documents
[1] u-blox AT Commands Manual, Docu No UBX-13002752
[2] u-blox SARA-U2 series Data Sheet, Docu No UBX-13005287
[3] u-blox SARA-G3 / SARA-U2 series System Integration Manual, Docu No UBX-13000995
[4] u-blox m-center User Guide, Docu No UBX-13001925
[5] u-blox EVK-U2x Quick Start, Docu No UBX-14002546
For regular updates to u-blox documentation and to receive product change notifications, register on our
homepage.
Revision history
Revision
Date
Name
Comments
R01
25-Mar-2014
sses
Initial release
R02
23-Jul-2014
sses
Update to Early Production Information status
R03
29-Jul-2015
sses
Updated EVK-U2x description including EVB-WL3 instead of EVB-WL1
R04
08-Jul-2016
sfal
Document applicability extended to EVK-U201SARA
R05
31-Oct-2017
lpah
Updated EVK-U201SARA product version