Ublox EVK-R4 Series User manual

UBX-16029216 - R07
C1-Public www.u-blox.com
EVK-R4
SARA-R4 series cellular evaluation kits
User guide
Abstract
This guide explains how to set up the EVK-R4 evaluation kits to begin evaluating the u-blox SARA-R4
series cellular modules supporting multi-band LTE-M / NB-IoT / EGPRS radio access technology.

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Document information
Title
EVK-R4
Subtitle
SARA-R4 series cellular evaluation kits
Document type
User guide
Document number
UBX-16029216
Revision and date
R07
05-May-2021
Disclosure restriction
C1-Public
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 production information
Data from product verification. Revised and supplementary data may be published later.
Mass production /
End of life
Production information
Document contains the final product specification.
This document applies to the following products:
Product name
Type number
Modem version
Application version
PCN reference
Product status
EVK-R410M
EVK-R410M-02B-00
L0.0.00.00.05.12
A.02.19
UBX-20058104
Initial production
EVK-R410M-52B-00
L0.0.00.00.06.08
A02.11
UBX-20033274
Obsolete
EVK-R410M-6-00
L0.08.12
A.01.12
UBX-20053055
Initial production
EVK-R410M-7-00
L0.08.12
A.01.12
UBX-20049254
Initial production
EVK-R410M-8-00
L0.08.12
A.01.12
UBX-20049255
Initial production
EVK-R412M
EVK-R412M-02B-00
M0.12.00
A.02.19
UBX-20058105
Initial production
EVK-R422M8S
EVK-R422M8S-0-00
00.10
A00.00
UBX-21007232
Engineering sample 2
u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this
document. Copying, reproduction, modification or disclosure to third parties of this document or any part thereof is only
permitted with the express written permission of u-blox.
The information contained herein is provided “as is” and u-blox assumes no liability for its use. No warranty, either express or
implied, is given, including but not limited to, 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 without notice. For the most recent
documents, visit www.u-blox.com.
Copyright © u-blox AG.

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Contents
Document information................................................................................................................................2
Contents ..........................................................................................................................................................3
1Starting up...............................................................................................................................................4
Appendix ....................................................................................................................................................... 18
ASetting up AT terminal applications for communication with the EVK-R4.................... 18
BSetting up a cellular packet data connection on a Windows PC......................................... 19
CExamples of AT commands............................................................................................................. 24
DCurrent consumption measurement............................................................................................ 26
EGlossary ................................................................................................................................................. 28
Declaration of conformities.................................................................................................................... 29
Related documentation ........................................................................................................................... 30
Revision history.......................................................................................................................................... 30
Contact.......................................................................................................................................................... 31

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1Starting up
1.1 EVK-R4 overview
The EVK-R4 kit is a powerful and easy-to-use tool that simplifies the evaluation of the u-blox SARA-R4
series multi-band LTE-M / NB-IoT / EGPRS cellular modules.
The following evaluation kits are available with u-blox SARA-R4 cellular modules:
•The EVK-R410M evaluation kit is for evaluation of SARA-R410M modules, and more specifically:
oThe EVK-R410M-02B evaluation kit is for the SARA-R410M-02B module product version
oThe EVK-R410M-52B evaluation kit is for the SARA-R410M-52B module product version
oThe EVK-R410M-6 evaluation kit is for the SARA-R410M-63B module product version
oThe EVK-R410M-7 evaluation kit is for the SARA-R410M-73B module product version
oThe EVK-R410M-8 evaluation kit is for the SARA-R410M-83B module product version
•The EVK-R412M evaluation kit is for evaluation of SARA-R412M modules
•The EVK-R422M8S evaluation kit is for evaluation of SARA-R422M8S modules
All the evaluation kits are identified herein as the EVK-R4.
☞See the SARA-R4 series data sheet [2] and the SARA-R4 series system integration manual [3] for
the features supported by the u-blox SARA-R4 series cellular modules.

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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
SARA-R410M
Cellular module
DIL B2B connector
J300
DIL B2B connector
J301
GND
Cellular VCC
supply jumper
J404
Cellular USB
(UART)
J501
Cellular RS232
(UART)
J500
DL501DL403 DL405
SW403
SW401
DL404
SW300
SW304
SW204
DS107
DS105
DS109
DS103
DS500
DS501
GND
GND
Cellular
antenna connector
ANT1 - J103
Cellular native USB
J104
Headset jack
J303
DS100
NEO-M8N GNSS
antenna connector
J208
NEO-M8N
GNSS module
GNSS
adapter board
GNSS USB
J102
DS132
DS118
DS124
DS121
BT200
Figure 1: Overview of the EVK-R410M evaluation kit for SARA-R410M modules

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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
SARA-R412M
Cellular module
DIL B2B connector
J300
DIL B2B connector
J301
GND
Cellular VCC
supply jumper
J404
Cellular USB
(UART)
J501
Cellular RS232
(UART)
J500
DL501DL403 DL405
SW403
SW401
DL404
SW300
SW304
SW204
DS107
DS105
DS109
DS103
DS500
DS501
GND
GND
Cellular
antenna connector
ANT1 - J103
Cellular native USB
J104
Headset jack
J303
DS100
NEO-M8N GNSS
antenna connector
J208
NEO-M8N
GNSS module
GNSS
adapter board
GNSS USB
J102
DS132
DS118
DS124
DS121
BT200
Figure 2: Overview of the EVK-R412M evaluation kit for SARA-R412M modules

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SIM card holder
J300
Cellular power-ctrl
SW302
GND
9 –18 V
Power input
J400
Cellular
adapter board
DL400
Main power switch
SW400
DL401
SARA-R422M8S
cellular module
DIL B2B connector
J300
DIL B2B connector
J301
GND
NEO-M8N GNSS
antenna connector
J208
NEO-M8N
GNSS module
GNSS
adapter board
Cellular VCC
supply jumper
J404
Cellular USB
(Single UART)
J501
Cellular RS232
(Single UART)
J500
DL501DL403
DL405
GNSS USB
J102
SW403
SW401
DL404
SW300
SW304
SW204
DS132
DS118DS124
DS121
DS107
DS105
DS109
DS103
DS500
DS501
GND
GND
BT200
Cellular native USB
J105
DS100
DS201
DS139
Cellular antenna
connector (ANT)
J106
SARA-R422M8S GNSS
antenna connector
J112
Cellular USB
(Two UARTs)
J201
Cellular VCC
supply jumper
J109
J248
Figure 3: Overview of the evaluation kit for SARA-R422M8S modules

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1.2 EVK-R4 block diagram
Figure 4 shows the main interfaces and internal connections of the evaluation kit for SARA-R410M
and SARA-R412M modules:
SIM
card holder
(J300)
Reset
(SW303)
Power-on
(SW302)
SARA-R41xM
adapter board
SARA-R41xM
Cellular
module
42-pin DIL B2B connector
42-pin DIL B2B connector
EVB-WL3
GNSS
module
GNSS adapter board
RF_IN
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 I2C
Step - Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
GPIO2/3/4
GNSS switch
(SW304)
ANT
Native
USB
Figure 4: Block diagram of the evaluation kit for SARA-R410M and SARA-R412M modules
Figure 5 shows the main interfaces and internal connections of the evaluation kit for SARA-R422M8S
modules:
SIM
card holder
(J300)
Power-ctrl
(SW302)
SARA-R422M8S
adapter board
SARA-R422M8S
module
42-pin DIL B2B connector (J300)
42-pin DIL B2B connector (J301)
EVB-WL3
GNSS
module
GNSS adapter board
RF_IN
USB
UART
converter
Cellular USB
(Main UART + TXD_GNSS)
(J501)
Cellular RS232
(Main UART)
(J500)
RS232
UART
converter UART
TXD_GNSS
MiniUSB/DB9
switch
(SW403)
On-board/B2B
switch
(SW401)
USB I2C
Step - down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
GPIO2/3/4
GNSS switch
(SW304)
Native
USB
(J105)
CEL
ANT
(J106)
Cellular USB
(two UARTs)
(J201)
GNSS
ANT
(J112)
USB/UART
converter
VCC jumper
(J109)
UART
(J248)
TXD_GNSS
Figure 5: Block diagram of the evaluation kit for SARA-R422M8S modules
The EVK-R4 is formed by three boards:
1. The lower one, called EVB-WL3, contains the power supply and other peripherals for the SARA-R4
series cellular module (SIM card holder, reset button and power-on / power-ctrl button).
2. The cellular adapter board, called ADP-R4, contains the SARA-R4 cellular module, antenna
connectors for the cellular RF interface and the GNSS RF interface
1
of the SARA-R4 module, USB
connectors for the two UART interfaces1and the USB interface of the SARA-R4 module, and the
DIL header connectors (J300 and J301) making accessible interfaces of the SARA-R4 module.
3. The GNSS adapter board, called ADP-GNSS, contains the u-blox NEO-M8N GNSS module, the
GNSS antenna connector and the USB connector for the u-blox NEO-M8N GNSS module.
1
EVK-R422M8S only.

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The cellular and the GNSS adapter 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, called EVB-WL3.
1.2.1 Specifics to the EVK for SARA-R42 series modules
If the on-board / B2B switch (SW401) on the EVB-WL3 board is set to “on-board”, and if a jumper
socket is inserted on the pin 1 and pin 2 of the 3-pin header J248 on the cellular adapter board (see
Figure 6), then the main UART interface of the SARA-R4 module, routed through the DIL header
board-to-board connectors mounted on the bottom of the cellular adapter board, can be accessed as
converted to USB interface on the USB connector (J501) on the EVB-WL3 board, or it can be accessed
as converted to RS232 interface on the RS232 DB9 connector (J500) on the EVB-WL3 board
according to the mini-USB / DB9 switch (SW403) settings.
If the on-board / B2B switch (SW401) on the EVB-WL3 board is set to “B2B” and if there is no jumper
socket inserted on the 3-pin header J248 on the cellular adapter board (illustrated in Figure 6), then
the UART interface(s) of the SARA-R4 module can be accessed at 1.8V CMOS signal levels on the DIL
header connector mounted on the top of the cellular adapter board, to communicate, for example,
with an external MCU.
If the on-board / B2B switch (SW401) on the EVB-WL3 board is set to “B2B” and if a jumper socket is
inserted on the pin 2 and 3 of the 3-pin header cellular UART jumper (J248) on the adapter board
(illustrated in Figure 6), the UART interfaces of SARA-R42 series module can be accessed as USB
interface on the USB connector (J201) on the cellular adapter board.
The UART data output of the internal GNSS system of SARA-R422M8S modules (TXD_GNSS line)
can be accessed as USB interface on the USB connector (J501) on the EVB-WL3 board.
The USB interface of the cellular module (supporting only FW update and diagnostic capability on
SARA-R42 series) is available on the native USB connector (J105) on the cellular adapter board.
Other SARA-R4 series peripherals are available on the dual-in-line male board-to-board connectors
provided on the top layer of the cellular adapter board.
The lower board (EVB-WL3) is designed to also be used with other u-blox cellular adapter boards. It
contains additional switches, jumpers, connectors, LEDs and parts that are only partially described in
Figure 1, Figure 2, and in Figure 3 of this document, because they are intended for use only with other
u-blox cellular modules. It is recommended to leave any additional connector unconnected, and to
leave any additional switch in its default configuration.
Pin 1Pin 3
Figure 6: 3-pin header J248 available to set the routing of the UART interfaces on the EVK for SARA-R42 series modules.

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1.3 Switches, jumpers and buttons
Function
Description
Name
Board
Main power switch
Power on / off of 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
J109
ADP-R42
Cellular power on
Push button to switch on / off SARA-R410M /-R412M modules
Push button to switch on / off / reset SARA-R422M8S modules
SW302
EVB
Cellular reset
Push button to abrupt switch off the SARA-R410M /-R412M modules
SW303
EVB
Cellular UART detach
Slide switch to attach / detach the cellular module main primary UART from the
USB / RS232 connectors on EVB-WL3
SW401
EVB
Cellular UART routing
Slide switch to select cellular module main primary UART routing on the USB or
RS232 connector on EVB-WL3
SW403
EVB
Cellular UART routing
3-pin header to route and make accessible the UART(s) of SARA-R42 modules
over the USB connector on the ADP board, or over the USB or RS232 connectors
on the EVB-WL3, or over the DIL B2B connector on the top of the ADP board
J248
ADP-R42
Cellular GPIO detach
Slide switch to attach / detach the cellular module GPIOs from peripherals:
when detached, the signals are available only on the DIL B2B connector on the
ADP board
SW300
EVB
Cellular GNSS detach 2
Slide switch to attach / detach the cellular module to / from the GNSS module
(GPIO2-3-4): when detached, the signals are available only on the DIL B2B
connector on the ADP board
SW304
EVB
GNSS V_BCKP
Slide switch to connect / disconnect backup battery to / from the V_BCKP pin of
the GNSS module
SW204
EVB
Table 1: EVK-R4 switch and button descriptions
1.4 LEDs
Function
Description
LED #
Board
Color
Main power
Power supply plugged in the 9 - 18 V Power Input
DL401
EVB
Cellular VCC
Cellular module supplied. Main power switch must be switched on
DL400
EVB
Cellular USB
(main UART)
USB cable plugged in the Cellular USB connector (J501) for access to
the main UART interface of cellular module
DL501
EVB
Cellular USB
(main UART)
Green light is on when the SW401 is in “on-board” position, and when
the cellular module main UART is routed to the Cellular USB connector
Red light blinks at UART TX or RX data on the Cellular USB connector
DL403
EVB
Cellular main UART
attach/detach
UART signals of the cellular module are available only on the ADP
board.
DL404
EVB
Cellular RS232
(main UART)
Green light is on when the main UART of the cellular module is routed
to the Cellular RS232 connector (J500)
Red light blinks at UART TX / RX data on the Cellular RS232 connector
DL405
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
SARA GNSS Timepulse
SARA-R422M8S GNSS TimePulse output
DS139
ADP-R42
Cellular native USB
USB cable plugged in the Cellular native USB connector (J104 / J105)
on the ADP-R4, for access to the USB interface of cellular module
DS100
ADP-R4x
2
For EVK-R422M8S it is recommended to keep this switch on “detach” position.

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Function
Description
LED #
Board
Color
Cellular USB
(two UARTs)
USB cable plugged in the Cellular USB connector (J201) on the
ADP-R4, for access to the two UART interfaces of SARA-R422M8S
DS201
ADP-R42
GNSS VCC supply
NEO-M8N GNSS module supply is turned ON
DS118
ADP-GNSS
GNSS USB
USB cable plugged into the GNSS USB connector for NEO-M8N
DS124
ADP-GNSS
NEO GNSS Timepulse
NEO-M8N GNSS TimePulse output
DS121
ADP-GNSS
Cellular / GNSS I2C
Cellular / GNSS module communication over the DDC (I2C) interface
DS132
ADP-GNSS
Table 2: EVK-R4 LED descriptions
1.5 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
SIM card holder
SIM card holder
J300
EVB
Cellular USB
(main UART)
Mini USB connector for the cellular module main UART interface converted
as a USB interface
J501
EVB
Cellular RS232
(main UART)
DB9 connector for the cellular module main UART interface converted as an
RS232 interface
J500
EVB
Cellular antenna
SMA connector for the cellular module antenna (ANT, Tx/Rx)
J106
ADP-R42
J103
ADP-R41
GNSS antenna
(for SARA-R422M8S)
SMA connector for the GNSS antenna to be connected to the GNSS RF
input of the SARA-R422M8S module (ANT_GNSS)
J112
ADP-R42
Cellular native USB
Mini USB connector for the cellular module native USB interface
J105
ADP-R42
J104
ADP-R41
Cellular USB
(two UARTs)
Mini USB connector for the two UART interfaces of the SARA-R422M8S
module converted as a USB interface
J201
ADP-R42
DIL B2B headers
Dual-in-line board-to-board connectors for cellular module interfaces
J300, J301
ADP-R4x
GNSS antenna
(for NEO-M8N)
SMA connector for the GNSS antenna to be connected to the GNSS RF
input of the NEO-M8N GNSS module (RF_IN)
J208
ADP-GNSS
GNSS USB
Mini USB connector for the GNSS module USB interface
J102
ADP-GNSS
GNSS backup battery
Backup battery socket for the GNSS module (under GNSS adapter board)
BT200
EVB
Cellular headset
Audio headset jack connector for the cellular module audio interface
J303
EVB
GND
Ground terminals for the probe reference
J402, J403
J405, J406
EVB
Table 3: EVK-R4 connector descriptions
⚠Caution! In the unlikely event of a failure in the internal protection circuitry, there is a risk of
explosion when charging a fully or partially discharged battery. Replace the battery when it no
longer has a sufficient charge for unit operation. Control the battery before use if the device has
not been used for an extended period.
⚠Caution! Risk of explosion if the battery is replaced with an incorrect type. Dispose of used
batteries according to the instructions!

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1.6 EVK-R410M pin out
SARA-R410M
DIL B2B
SARA-R410M
DIL B2B
Pin N°
Name
Name / Pin N°
Pin N°
Name
Name / Pin N°
1
GND
J301 pins 7-8-9-10
33
RSVD
Not available
2
RSVD
J301 pin 3
34
I2S_WA
Not available
3
GND
J301 pins 7-8-9-10
35
I2S_TXD
Not available
4
V_INT
J301 pin 36
36
I2S_CLK
Not available
5
GND
J301 pins 7-8-9-10
37
I2S_RXD
Not available
6
DSR
J301 pin 18
38
SIM_CLK
J300 pin 15
7
RI
J301 pin 17
39
SIM_IO
J300 pin 14
8
DCD
J301 pin 11
40
SIM_RST
J300 pin 16
9
DTR
J301 pin 12
41
VSIM
J300 pin 13
10
RTS
J301 pin 13
42
GPIO5
J301 pin 23
11
CTS
J301 pin 14
43
GND
J301 pins 7-8-9-10
12
TXD
J301 pin 15
44
SDIO_D2
J301 pin 30
13
RXD
J301 pin 16
45
SDIO_CLK
J300 pin 19
14
GND
J301 pins 7-8-9-10
46
SDIO_CMD
J300 pin 18
15
PWR_ON
J301 pin 29
47
SDIO_D0
J300 pin 17
16
GPIO1
J301 pin 33
48
SDIO_D3
J301 pin 39
17
VUSB_DET
Not available
49
SDIO_D1
J301 pin 37
18
RESET_N
J300 pin 26
50
GND
J301 pins 7-8-9-10
19
GPIO6
Not available
51
VCC
J300 pins 7-8-9-10
20
GND
J301 pins 7-8-9-10
52
VCC
J300 pins 7-8-9-10
21
GND
J301 pins 7-8-9-10
53
VCC
J300 pins 7-8-9-10
22
GND
J301 pins 7-8-9-10
54
GND
J301 pins 7-8-9-10
23
GPIO2
J301 pin 31
55
GND
J301 pins 7-8-9-10
24
GPIO3
J301 pin 32
56
ANT
Not available
25
GPIO4
J301 pin 25
57
GND
J301 pins 7-8-9-10
26
SDA
J300 pin 21
58
GND
J301 pins 7-8-9-10
27
SCL
J300 pin 20
59
GND
J301 pins 7-8-9-10
28
USB_D-
Not available
60
GND
J301 pins 7-8-9-10
29
USB_D+
Not available
61
GND
J301 pins 7-8-9-10
30
GND
J301 pins 7-8-9-10
62
ANT_DET
Not available
31
RSVD
Not available
63
GND
J301 pins 7-8-9-10
32
GND
J301 pins 7-8-9-10
64
GND
J301 pins 7-8-9-10
Table 4: Interfaces of the SARA-R410M module, as routed on the 42-pin dual-in-line board-to-board connectors (J300, J301)
available on the adapter board ADP-R410M of the EVK-R410M evaluation kit
☞The pins / interfaces that are not supported by a specific SARA-R4 product version should not be
driven by an external device (see the SARA-R4 series data sheet [2] and the SARA-R4 series
system integration manual [3] for features supported by each SARA-R4 module product version).

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1.7 EVK-R412M pinout
SARA-R412M
DIL B2B
SARA-R412M
DIL B2B
Pin N°
Name
Name / Pin N°
Pin N°
Name
Name / Pin N°
1
GND
J301 pins 7-8-9-10
33
RSVD
Not available
2
RSVD
J301 pin 3
34
I2S_WA
Not available
3
GND
J301 pins 7-8-9-10
35
I2S_TXD
Not available
4
V_INT
J301 pin 36
36
I2S_CLK
Not available
5
GND
J301 pins 7-8-9-10
37
I2S_RXD
Not available
6
DSR
J301 pin 18
38
SIM_CLK
J300 pin 15
7
RI
J301 pin 17
39
SIM_IO
J300 pin 14
8
DCD
J301 pin 11
40
SIM_RST
J300 pin 16
9
DTR
J301 pin 12
41
VSIM
J300 pin 13
10
RTS
J301 pin 13
42
GPIO5
J301 pin 23
11
CTS
J301 pin 14
43
GND
J301 pins 7-8-9-10
12
TXD
J301 pin 15
44
SDIO_D2
J301 pin 30
13
RXD
J301 pin 16
45
SDIO_CLK
J300 pin 19
14
GND
J301 pins 7-8-9-10
46
SDIO_CMD
J300 pin 18
15
PWR_ON
J301 pin 29
47
SDIO_D0
J300 pin 17
16
GPIO1
J301 pin 33
48
SDIO_D3
J301 pin 39
17
VUSB_DET
Not available
49
SDIO_D1
J301 pin 37
18
RESET_N
J300 pin 26
50
GND
J301 pins 7-8-9-10
19
GPIO6
J301 pin 24
51
VCC
J300 pins 7-8-9-10
20
GND
J301 pins 7-8-9-10
52
VCC
J300 pins 7-8-9-10
21
GND
J301 pins 7-8-9-10
53
VCC
J300 pins 7-8-9-10
22
GND
J301 pins 7-8-9-10
54
GND
J301 pins 7-8-9-10
23
GPIO2
J301 pin 31
55
GND
J301 pins 7-8-9-10
24
GPIO3
J301 pin 32
56
ANT
Not available
25
GPIO4
J301 pin 25
57
GND
J301 pins 7-8-9-10
26
SDA
J300 pin 21
58
GND
J301 pins 7-8-9-10
27
SCL
J300 pin 20
59
GND
J301 pins 7-8-9-10
28
USB_D-
Not available
60
GND
J301 pins 7-8-9-10
29
USB_D+
Not available
61
GND
J301 pins 7-8-9-10
30
GND
J301 pins 7-8-9-10
62
ANT_DET
Not available
31
RSVD
Not available
63
GND
J301 pins 7-8-9-10
32
GND
J301 pins 7-8-9-10
64
GND
J301 pins 7-8-9-10
Table 5: Interfaces of the SARA-R412M module, as routed on the 42-pin dual-in-line board-to-board connectors (J300, J301)
available on the adapter board ADP-R412M of the EVK-R412M evaluation kit
☞The pins / interfaces that are not supported by a specific SARA-R4 product version should not be
driven by an external device (see the SARA-R4 series data sheet [2] and the SARA-R4 series
system integration manual [3] for features supported by each SARA-R4 module product version).

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1.8 EVK-R422M8S pinout
SARA-R422M8S
DIL B2B connector
SARA-R422M8S
DIL B2B connector
Pin no.
Signal name
Name / pin number
Pin no.
Signal name
Name / pin number
1
GND
J301 pins 7-8-9-10
33
RSVD
J301 pin 36
2
USB_3V3
J301 pin 4
34
I2S_WA
J300 pin 26
3
GND
J301 pins 7-8-9-10
35
I2S_TXD
J300 pin 23
4
V_INT
J301 pin 35
36
I2S_CLK
J300 pin 21
5
GND
J301 pins 7-8-9-10
37
I2S_RXD
J300 pin 24
6
DSR
J301 pin 17
38
SIM_CLK
J300 pin 16
7
RI
J301 pin 18
39
SIM_IO
J300 pin 13
8
DCD
J301 pin 12
40
SIM_RST
J300 pin 15
9
DTR
J301 pin 11
41
VSIM
J300 pin 14
10
RTS
J301 pin 14
42
GPIO5
J301 pin 24
11
CTS
J301 pin 13
43
GND
J301 pins 7-8-9-10
12
TXD
J301 pin 16
44
ANT_ON3
J300 pin 4
13
RXD
J301 pin 15
45
TIMEPULSE3
J300 pin 1
14
GND
J301 pins 7-8-9-10
46
EXTINT3
J300 pin 3
15
PWR_CTRL
J301 pin 30
47
TXD_GNSS3
J301 pin 19
16
GPIO1
J301 pin 34
48
RSVD
Not available
17
USB_5V0
Not available
49
RSVD
Not available
18
RSVD
J300 pin 25
50
GND
J301 pins 7-8-9-10
19
GPIO6
J301 pin 23
51
VCC
J300 pins 7-8-9-10
20
GND
J301 pins 7-8-9-10
52
VCC
J300 pins 7-8-9-10
21
GND
J301 pins 7-8-9-10
53
VCC
J300 pins 7-8-9-10
22
GND
J301 pins 7-8-9-10
54
GND
J301 pins 7-8-9-10
23
GPIO2
J301 pin 32
55
GND
J301 pins 7-8-9-10
24
GPIO3
J301 pin 31
56
ANT
Not available
25
GPIO4
J301 pin 26
57
GND
J301 pins 7-8-9-10
26
SDA
J300 pin 22
58
GND
J301 pins 7-8-9-10
27
SCL
J300 pin 19
59
GND
J301 pins 7-8-9-10
28
USB_D-
Not available
60
GND
J301 pins 7-8-9-10
29
USB_D+
Not available
61
GND
J301 pins 7-8-9-10
30
GND
J301 pins 7-8-9-10
62
ANT_DET
Not available
31
ANT_GNSS3
Not available
63
GND
J301 pins 7-8-9-10
32
GND
J301 pins 7-8-9-10
64
GND
J301 pins 7-8-9-10
Table 6: Interfaces of SARA-R422M8S modules, as routed on the 42-pin dual-in-line board-to-board connectors (J300, J301)
available on the ADP-R4 adapter board of the EVK-R4 evaluation kit
☞The pins / interfaces that are not supported by a specific SARA-R4 version should not be driven by
an external device (see the SARA-R4 series data sheet [2] and the SARA-R4 series system
integration manual [3] for features supported by each SARA-R4 module product version).
3
SARA-R422M8S modules only.

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1.9 Software installation
The USB drivers for Windows operating systems are available with the EVK-R4. Executable files can
be downloaded from www.u-blox.com/evk-downloads and saved to any location on the computer hard
drive. The installation can be started by running the executable file on a computer with the Windows
operating system.
1.10 Board setup
1. Insert a SIM card into the SIM card holder (J300 on the EVB).
2. Connect the cellular antenna provided with the evaluation kit box to the Cellular antenna SMA
connector on the ADP-R4 (ANT connector for transmission and reception of LTE RF signals)
3. If the GNSS functionality is required:
3.1. For the EVK-R410M and EVK-R412M, connect the GNSS antenna provided with the
evaluation kit box to the GNSS antenna SMA connector on the ADP-GNSS (J208); keep the
cellular GNSS detach switch (SW304) in “GNSS” position.
3.2. For the EVK-R422M8S, connect the GNSS antenna provided with the evaluation kit box to
the GNSS antenna SMA connector on the ADP-R422M8S (J112); keep the cellular GNSS
detach switch (SW304) in “detach” position.
Place the GNSS antenna in a location with a good view of the sky.
☞Interface to the NEO-M8N GNSS module is not supported by SARA-R422M8S
4
.
4. Connect the AC / DC +12 V power adapter provided with the evaluation kit box to the 9 –18 V
Power input connector (J400 on the EVB). The LED DL401 lights blue.
5. Be sure to provide a jumper socket on the Cellular VCC supply jumpers (the J404 on the EVB,
and the J109 on the ADP-R42). These jumpers provide 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 board power supply, turn the Main power switch (SW400 on the EVB) to the ON
position. The LED DL400 lights green.
7. For communication via the cellular module’s UART interface, the following connections are
allowed and can be alternatively enabled in a mutually exclusive way (see Table 7 for the switch
position and LED status):
7.1. Connect a USB cable to the mini USB connector on the EVB (Cellular USB, J501). The LED
DL501 lights blue. 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 main UART interface is available over the first COM port.
The GNSS UART output of SARA-R422M8S is available over the second COM port.
7.2. Connect an RS232 cable to the DB9 connector (Cellular RS232, J500 on EVB).
7.3. Connect a USB cable to the mini USB connector on the ADP-R42 (Cellular USB, J201). The
LED DS201 lights blue. When a USB cable is connected to this mini USB connector, two
COM ports are enabled in Windows: the two UART interfaces of the SARA-R42 series
modules are respectively available over the two numbered COM ports opened by the driver
(to enable the two UART interfaces, see the AT command manual [1], +USIO AT command).
4
Supply for the NEO-M8N GNSS module can be provided mounting the 0R jumper R106 and removing the 0R jumper R107 on
the ADP-GNSS

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Type of connections
SW401
SW403
J248
LED
Access to the main UART of SARA-R4 modules, and the
GNSS UART output of SARA-R422M8S modules, over the
Cellular USB mini USB connector on the EVB-WL3 (J501)
ON BOARD
MINIUSB
Jumper socket on pins 1-2
DL403
DL501
Access to the main UART of SARA-R4 modules over the
Cellular RS232 DB9 connector on the EVB-WL3 (J500)
ON BOARD
DB9
Jumper socket on pins 1-2
DL405
Access to UART(s) accessible on the DIL Board-to-Board
header connector on the top of the adapter board (J301),
with UART(s) detached from the mini USB (J501) and
RS232 (J500) connectors on EVB-WL3, and detached
from the mini USB (J201) connector on the ADP-R42
B2B
Do not care
No jumper socket
DL404
Access to the two UART of SARA-R42 modules over the
Cellular USB mini USB connector on the ADP-R42 (J201),
with UARTs detached from mini USB (J501) and RS232
(J500) connectors on EVB-WL3
B2B
Do not care
Jumper socket on pins 2-3
DL404
DS201
Table 7: Serial interface configuration
Run an AT terminal application (e.g. the u-blox m-center tool), and select the AT COM port with
the following settings:
oData rate: 115,200 bit/s
oData bits: 8
oParity: N
oStop bits: 1
oFlow control: HW
See Appendix Afor how to configure the u-blox m-center AT terminal for Windows.
8. To access the cellular module via USB interface, connect a USB cable to the Cellular native USB
connector on the ADP-R4. The related LED DS100 lights blue.
After the end of modules’boot (refer to point 9for the procedure to switch-on the cellular
module), the ports listed in Table 8 are enabled by the Windows USB driver (details as the
numbering of the ports can be seen via the Windows Device Manager):
Type
Remarks
Modems
AT command interface and data communication 5
Ports (COM & LPT)
Diagnostic purpose
Table 8: Cellular USB interface configuration
For AT communication with the SARA-R410M and SARA-R412M modules, run an AT terminal
application (e.g. the u-blox m-center tool) and select the AT modem port, with these settings
oData rate: 115,200 bit/s
oData bits: 8
oParity: N
oStop bits: 1
oFlow control: HW
See Appendix Afor how to configure the u-blox m-center AT terminal for Windows.
9. To switch on the cellular module, press the Cellular Power-on / Power-ctrl button (SW302 on the
EVB-WL3 board).
5
SARA-R410M and SARA-R412M modules only

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1.11 Enabling 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.
1.12 PIN 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).
1.13 Registration on a cellular network
Command sent by DTE (user)
DCE response (module)
Description
AT+CEREG?
+CEREG: 0,1
OK
Verify the network registration status.
AT+COPS?
+COPS: 0,0,"Verizon
Wireless",7
OK
Read the operator name and radio access technology
(RAT).
1.14 Switching off the EVK-R4
To switch off the EVK-R4, send the +CPWROFF AT command. Make sure to use this command before
switching off the main power, otherwise settings and configuration parameters may not be saved in
the internal non-volatile memory of the cellular module.

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Appendix
ASetting up AT terminal applications for
communication with the EVK-R4
The u-blox m-center cellular module evaluation tool is a powerful platform for evaluating, configuring
and testing u-blox cellular products. 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 1.10 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 1.10.
Check with the Windows Device Manager to
find out which COM port is being used by the
EVK-R4.
Figure 7: “Home” page
4. Enable the connection to the 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 the EVK-R4.
Figure 8: 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 SARA-R4 series AT commands
manual [1].
For more information on using the u-blox m-center cellular module evaluation tool, press the F1 key
on the keyboard to open the m-center help window on the computer.

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BSetting up a cellular packet data connection
on a Windows PC
This section describes how to set up a packet data connection with the Windows 7 operating systems
(for PC) and EVK-R4, 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:
1. Over the UART interface of the cellular module: connect the Windows PC to the Cellular USB
connector (J501 on EVB) or the Cellular RS232 connector (J500 on the EVB)
2. Over the native USB interface of SARA-R410M or SARA-R412M module: connect the Windows
PC to the Cellular Native USB connector (J105 on the ADP)
B.1 How to install and configure a modem data connection over
UART
This example describes how to install and configure a data connection on a PC with the 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 the EVB).
1. Follow the board setup instructions in section 1.10 to provide the required connections with the
EVK-R4.
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
(33,600 bit/s).

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5. Set the COM port on which the
modem will be installed.
6. From the “Device Manager”>
Modems > Standard Modem
33,600 bps Modem #X (X is the
assigned modem number) right
click and select “Properties”.
7. Select the “Advanced” tab.
8. Add in the “Extra initialization
commands” string: AT&S0
9. Click on OK.
10. Open the “Control Panel”.
11. Select “Set up a new connection or network”.