Ublox XPLR-HPG-2 User manual

XPLR-HPG-2 - User guide
UBX-23003719 - R02
C1-Public www.u-blox.com
XPLR-HPG-2
High-precision GNSS evaluation platform
User guide
Abstract
This document describes the XPLR-HPG-2 explorer kit used for evaluating and prototyping of high-
precision GNSS solutions. It explains the positioning, cellular, and short-range radio modules hosted
on the C214 application board and provides information about the various module configurations
and related use cases that can be explored using the kit. It can also be used as a quick start guide to
get kit up and running as quickly as possible.

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Document information
Title
XPLR-HPG-2
Subtitle
High-precision GNSS evaluation platform
Document type
User guide
Document number
UBX-23003719
Revision and date
R02
10-Nov-2023
Disclosure restriction
C1-Public
This document applies to the following products:
Product name
Ordering code
Firmware version
Application version
PCN reference
XPLR-HPG-2
XPLR-HPG-2
-
v1.0
N/A
u-blox or third parties may hold intellectual property rights in the products, names, logos, and designs included in this
document. Copying, reproduction, or modification of this document or any part thereof is only permitted with the express
written permission of u-blox. Disclosure to third parties is permitted for clearly public documents only.
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
1Functional description .........................................................................................................................4
1.1 Module integration .....................................................................................................................................4
1.2 Kit includes ...................................................................................................................................................5
2Hardware ..................................................................................................................................................6
2.1 C214 application board..............................................................................................................................6
2.2 Control and communication .....................................................................................................................9
2.3 Correction data............................................................................................................................................9
2.3.1 Use case #1: Correction data through L-band receiver.............................................................10
2.3.2 Use case #2: Correction data through cellular modem ............................................................11
2.3.3 Use case #3: Correction data through Wi-Fi connection..........................................................12
2.4 Power subsystem......................................................................................................................................13
2.4.1 Jumpers and connectors ................................................................................................................13
2.4.2 Battery ................................................................................................................................................13
2.4.3 LEDs ....................................................................................................................................................14
2.5 USB subsystem .........................................................................................................................................14
2.6 Test points .................................................................................................................................................14
3Software ................................................................................................................................................ 16
3.1 HPG use case examples...........................................................................................................................16
3.2 u-blox library (ubxlib) ................................................................................................................................17
4Module configuration ........................................................................................................................ 18
4.1 NINA-W106 short range radio................................................................................................................18
4.1.1 Configuring the I2C bus...................................................................................................................18
4.1.2 GPIO pin-out.......................................................................................................................................19
4.1.3 Auto reset circuit ..............................................................................................................................20
4.1.4 JTAG connector ................................................................................................................................21
4.2 ZED-F9R –GNSS receiver .......................................................................................................................22
4.2.1 Jumpers and connectors ................................................................................................................22
4.2.2 LEDs ....................................................................................................................................................23
4.3 NEO-D9S L-band receiver .......................................................................................................................24
4.3.1 Jumpers and connectors ................................................................................................................24
4.4 LARA-R6001D cellular modem ..............................................................................................................25
4.4.1 Jumpers and connectors ................................................................................................................25
5Quick start guide................................................................................................................................. 27
Appendix ....................................................................................................................................................... 30
AGlossary ................................................................................................................................................. 30
Related documentation ........................................................................................................................... 31
Revision history.......................................................................................................................................... 32
Contact.......................................................................................................................................................... 32

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1Functional description
The XPLR-HPG-2 explorer kit provides a compact platform for the evaluation and prototyping of the
u-blox solution for high-precision GNSS. Comprising integrated GNSS, cellular, and short-range radio
modules, the platform accesses correction data from satellite broadcasts using an L-band satellite
GNSS receiver or through IP connectivity using Wi-Fi or cellular. The correction data, which
compensates for satellite and atmospheric errors, is provided by the u-blox PointPerfect GNSS
augmentation service and delivered through the Thingstream IoT service delivery platform. The
platform topology and data communication between each of the component systems is shown in
Figure 1.
Figure 1: XPLR-HPG-2 platform topology
1.1 Module integration
XPLR-HPG-2 integrates the following positioning, cellular, and short-range radio modules:
•ZED-F9R high precision dead reckoning module [6]: Global navigation satellite system (GNSS) for
high-precision GNSS positioning in challenging environments, including:
oMulti-band GNSS receiver delivers centimeter-level accuracy
oNative support for PointPerfect GNSS augmentation service
•NEO-D9S correction data L-band receiver module [9]: Receives satellite data and broadcasts
L-band correction data, which can be configured for use with a variety of correction services. The
module supports:
oAccess to centimeter-level GNSS corrections globally
oFreedom to select GNSS correction data delivery channel
oAllows selection of desired L-band GNSS correction service
•LARA-R6 single or multi-mode LTE Cat 1 cellular module [12]: Modem for Internet of Things (IoT)
and Machine to Machine (M2M) applications, including:
oSecure Cloud
oUniversal connectivity and reliable performance in smallest form factor
oReduced logistics complexity, with three regional product variants and extensive certifications
from the mobile network operator (MNO)
oAny region, any band, any technology for simple roaming anywhere in the world
oWorld's smallest LTE Cat 1 module - used for cellular applications - with global coverage, ideal
for size-constrained devices (LTE CAT-1 = medium speed wireless communication standard
specifically designed for Internet of Things (IoT) and Machine to Machine (M2M) use cases).
oReceive-diversity for reliable performance in difficult conditions
oSecure by design to always keep your device running and updated
•NINA-W106 stand-alone multiradio module [3], including:
oWi-Fi 802.11b/g/n and dual-mode Bluetooth v4.2 radio connectivity
oPowerful open CPU for advanced customer applications
oSmall footprint and multiple antenna options

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1.2 Kit includes
The XPLR-HPG-2 kit is suitable to develop applications that require high-precision GNSS positioning
devices feature real-time kinematics, dead reckoning, cellular, Wi-Fi, and Bluetooth communication.
The kit includes:
•C214 high-precision GNSS application board hosting the GNSS and communications modules
•2x LTE antennas
•1x GNSS high precision patch antenna suitable for L-band
•2x protective plexiglass sheets
•12 cm ground plane
•Screws and standoffs
•USB cable
•Thingstream promo code that provides one month of free access to the PointPerfect IP service
•Application software example in source code
•PointPerfect GNSS augmentation service (Trial version)
•AssistNow location services
☞XPLR-HPG-2 is shipped as a fully assembled product that includes two protective plexiglass
sheets over each side the PCB. Customers need only connect the antennas before configuring and
using the platform.

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2Hardware
XPLR-HPG-2 comprises four u-blox modules:
•NINA-W106 short range radio as the controller and for Wi-Fi/Bluetooth connectivity
•ZED-F9R GNSS receiver
•NEO-D9S L-BAND receiver
•LARA-R6001D cellular module
See also Module integration.
2.1 C214 application board
The C214 application board hosts the L-band, GNSS, cellular, and multiradio modules together with
the following component items:
•USB-C connector (J1) connected to a 4-port USB hub that facilitates the direct communication of
all the modules to an external PC
•MicroSD connector (J10), which can be used as a persistent memory for logging.
•Li-ion battery charger for charging the single-cell Li-ion 18650 battery (not included) that powers
the board when it is disconnected from the mains supply. The charger is powered through the
USB-C connector.
•QWIIC®[28] connector and I2C (J4) pin header for connecting and evaluating external modules or
devices.
•LEDs for presenting the status of the board
•Three buttons:
oPower On: Press to power up the LARA-R6 cellular module
oReset: Press to reset the NINA-W106 module
oBoot: Press and hold for five seconds to erase user credentials
Removing the power of the XPLR-HPG-2 board reboots all modules.
⚠Ensure that the LARA-R6 cellular module is off. Disconnecting power while LARA-R6 is operational
may result in irreparable damage to the device. In the XPLR-PG-2 design, the default state of the
LARA module is “off”, which ensures that it is safe to power cycle the board.
The XPLR-HPG-software examples, which utilize the LARA module, feature functionality tied to the
boot0 button. To perform a graceful shutdown of the LARA module, press the button for 5 seconds.
The examples run for a predefined duration, and once that time elapses, the software shuts down the
LARA module. As a result, it is safe to disconnect power after the shutdown process has been
triggered.
Three pin headers (J2, J5 and J10) usefully expose the module IOs, including:
•JTAG (J11) pin header for debugging the NINA-W106 module
•One SMA connector for GNSS and L-band receiver antenna
•Two SMA connectors for the cellular modem antennas
•41 test points. See also Test points.
☞The C214 board provides standard 0.1'' through-hole (TH) pads that expose all available signals of
the connected modules. Pin headers are not included in the kit.
The schematics and other project resources can be found in the XPLR-HPG-2 folder in the Altium
XPLR-HPG hardware repository [16] .

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Figure 2 shows the top side of the C214 application board and the physical location of the main
component items.
Figure 2: C214 board description (top side)

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Figure 3 shows the bottom side of the C214 application board and the physical location of the pin
headers.
Figure 3: C214 board description (bottom side)

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2.2 Control and communication
The NINA-W106 multiradio module runs the high-precision GNSS application. It controls the
communications between the ZED-F9R GNSS module and NEO-D9S L-band receiver module over the
I2C bus. It also connects the LARA-R6 cellular modem through a 4-pin UART interface, as shown in
Figure 4Figure 4.
Figure 4: XPLR-HPG-2 module connections
⚠If the update of the ZED-F9R firmware fails to install, the USB hub might become unavailable. In
such cases, you need additional hardware to connect board interfaces that are otherwise not
accessible through a connector. For example, the UART1 interface.
2.3 Correction data
XPLR-HPG-2 can receive GNSS correction data over Wi-Fi, through the GNSS and L-band antenna, or
through either of the LTE antennas (1 or 2). The NINA-W106 module provides the Wi-Fi interface,
manages the decryption keys, and receives GNSS correction data from the other three modules. In
this way, the XPLR-HPG-2 can work in three different modes of operation –as described in the
following sub-sections as use cases:
•Use case #1: Correction data through L-band receiver
•Use case #2: Correction data through cellular modem
•Use case #3: Correction data through Wi-Fi connection

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2.3.1 Use case #1: Correction data through L-band receiver
L-band represents the range of frequencies in the radio spectrum from 1.2 GHz to 2 GHz, which is the
top end of the ultra-high frequency (UHF) band and the lower end of the microwave range.
In this scenario:
1. The NEO-D9S L-band receiver operates in the 1525 MHz to 1559 MHz frequency bands and
receives correction data through L-band antenna.
2. The NINA-W106 multiradio module receives correction data from NEO-D9S, which is
communicated over the I2C bus.
3. NINA-W106 forwards the correction data to the ZED-F9R GNSS receiver over the same I2C bus.
The active components in this use case are shown in Figure 5.
Figure 5: Correction data flow (L-band)
☞NINA-W106 also forwards the decryption keys for the correction data packages to ZED-F9R. The
decryption keys (changed monthly) can be downloaded from the internet over a NINA-W106 Wi-Fi
connection or LARA-R6 cellular connection, using the MQTT messaging protocol.

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☞For library references, code examples, build instructions, macro and component definitions
related to this use case, see the GitHub example: “Correction data via NEO-D9S L-band module to
ZED-F9R with the help of MQTT –using certificates” [25].
2.3.2 Use case #2: Correction data through cellular modem
In this scenario:
1. The LARA-R6 cellular modem receives the correction data and the decryption keys over the
cellular network, using an MQTT connection to the cloud-based Thingstream delivery platform
for IoT services.
2. The NINA-W106 multiradio module then reads the correction data through the 4-pin UART
interface and then forwards the data and the decryption keys to the ZED-F9R GNSS module over
the I2C bus.
The active components in this use case are shown in Figure 6.
Figure 6: Correction data flow (cellular modem)
☞For library references, code examples, build instructions, macro and component definitions
related to this use case, see the XPLR-HPG GitHub example “Correction Data over MQTT from
Thingstream PointPerfect Service” [26].

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2.3.3 Use case #3: Correction data through Wi-Fi connection
In this scenario:
1. The NINA-W106 multiradio module functions as a Wi-Fi host and receives the correction data
and the decryption keys over a Wi-Fi network, using an MQTT connection.
2. The data is then forwarded to the ZED-F9R GNSS module over the I2C bus.
3. NINA-W106 then forwards the decryption keys for the correction data packages to ZED-F9R.
The active components in this use case are shown in Figure 7.
Figure 7: Correction data flow (Wi-Fi)
☞For library references, code examples, build instructions, macro and component definitions
related to this use case, see the XPLR-HPG GitHub example “Correction data via Wi-Fi MQTT to
ZED-F9R using certificates” [27].

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2.4 Power subsystem
The location of the power system components on the C214 board are shown in Figure 8.
Figure 8: Power system components –showing battery connector polarity
2.4.1 Jumpers and connectors
XPLR-HPG-2 supports multiple power options, where:
•USB-C connector (J1) supplies power directly to the board from the connected device
•Battery connector (J7) supplies power from an externally connected single-cell Li-ion battery
•MP2617H (Monolithic Power System, MPS) switch-mode battery charger (U12) manages power
supply to the board through both the USB-C connector (J1) and Li-ion battery.
In situations where the USB-C port supplies more power than the board requires, the MP2617H
(Figure 8) redirects and uses the rest of the power to charge the battery. Conversely, if the power
source connected to the USB-C port delivers insufficient power, the battery compensates for the
power deficiency.
2.4.2 Battery
A Li-ion battery can be connected to XPLR-HPG-2 through the (2-pin, 2 mm pitch, JST type)
connector J7. The battery is used when no USB is connected to the device or when the power supplied
by the USB host is insufficient. In the latter case, the extra power needed is drawn from the battery.
As the C214 application board includes the appropriate protection circuits against overcharge, over-
discharge, overcurrent, etc., it is not necessary to insert batteries that include their own integrated
protection circuits. Notably, batteries of this type are generally too physically long to fit the battery
holder on the board, which has a 64.85 mm length.
⚠Use a suitable single-cell, Li-ion type battery (like the Sparkfun PRT-13855) with the same polarity
connections shown in Figure 8.

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The output of the battery charger is connected to two Onsemi NCP690MNxx, 1 A, linear regulators
(U7 and U8). One regulator provides a 3.3 V fixed output, while the other has an adjustable output set
to 3.75 V. The 3.3 V regulator supplies the complete board except for the cellular modem, which is
supplied by the adjustable output.
2.4.3 LEDs
The C214 board comes with several LEDs that provide visual feedback to the user related to power
status and module activities. Table 1 describes the functionality of each LED.
LED
Description
Charge
indicates charge status of battery.
ON: Battery is charging.
OFF: Charge complete.
VIN
Powered by the charger output. Lit when the supply voltage is applied to the linear
regulators.
3.3V
Powered by the output of the 3.3 V linear regulator.
USB
USB status.
ON: indicates an USB connection between the board and the computer.
STATUS
NINA-W106 status (user defined). Currently programmed such as:
ON: the NINA-W106 module is powered on.
OFF: the NINA-W106 module is powered off.
RING
UART ring indicator (red) indicates an incoming ring signal. Otherwise, OFF.
ON
LARA-R6 power status (green).
ON: the LARA-R6 module is powered on.
OFF: the LARA-R6 module is powered off.
NET
LTE network status (blue).
ON: LTE network connection active.
OFF: No network connection.
Note: GPIO9 of LARA-R6 module needs to be programmed for network indication.
By default, the LED remains OFF.
RTK
RTK status.
ON –RTK fixed mode.
LED blinking –receiving and using corrections.
LED OFF –no corrections.
Geofence
Geofence status.
ON: Geofence configured.
OFF: Geofence not configured.
Note: User needs to set pin polarity and geofencing configuration registers.
PPS
PPS status (Time pulse).
The LED pulses at a rate of 1 Hz when the module has acquired valid GNSS time
data. Note: Output pulse of the LED can be further configured through related
configuration registers.
Table 1: LED functions
2.5 USB subsystem
XPLR-HPG-2 incorporates a 4-port USB 2.0 hub that connect to the various u-blox modules through
the USB port (J1) that is used for monitoring, setup, and programming. NINA-W106 UART is
connected to the USB hub through a Silicon Labs CP2102N USB to UART chip (U2).
2.6 Test points
The C214 includes test points throughout the layout to facilitate system monitoring and application
debugging. Table 2 describes the available test points on C214. The location of all test points (TP1–
TPx) are identified in the silkscreen on the bottom side of the board, as shown in Figure 3.

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Test point
Signal
Description
1
GND
System ground
2
SYS_OUT
Output from DC/DC converter (4.35 VDC)
3
3.3V
3.3 VDC nominal power rail, source = SYS_OUT
4
VCC_2
3.7 VDC nominal power rail, source = SYS_OUT
5
V_LIPO
3.8-3.9 VDC, if only battery is connected
4.1-4.17 VDC, if battery and USB are connected
6
V_USBC
USB-C Voltage (5V)
7
USB_P
USB positive differential pin
8
USB_N
USB negative differential pin
9
USB_3V3
Output from USB Hub (3.3 VDC)
10
ACOK
Indicates the presence of a valid output power (MP2617HGL)
11
VCCIO
I/O Reference Voltage (1.7 –1.9 VDC)
12
USB_LED
USB status. ON: indicates an USB connection between the board and the computer
13
LTE_PWR_ON
Power-on input pin to LARA-R6 (GND –Reset)
14
NINA_BOOT
NINA-W106 Boot
15
NINA_RESET
NINA-W106 Reset
16
STATUS_LED
NINA-W106 status.
ON: the NINA-W106 module is powered on
OFF: the NINA-W106 module is powered off
Note: User defined –can be freely controlled through firmware
17
3.3V_LED
ON: indicates that 3.3 V signal is available
18
SYS_OUT_LED
ON: indicates the SYS_OUT is enable (VIN LED)
19
RING_LED
LTE ring indicator. Red: indicates receiving a ringing signal. Otherwise, OFF.
20
ON_LED
LARA-R6 power status
ON: the LARA-R6 module is powered on
OFF: the LARA-R6 module is powered off
21
NET_LED
LTE network status. Blue: indicates that the LTE network is been used.
Otherwise, OFF.
22
LEVEL_SHIFTER_EN
Status of level shifter (U10) enable pin (0 VDC –enable, VCCIO –disable)
23
V_BAT
Cell-Battery voltage (Built-in on C214).
24
I2C_SCL
I2C clock
25
I2C_SDA
I2C data
26
ZED_RTK_STAT_LED
RTK status. LED ON –RTK fixed mode
LED blinking –receiving and using corrections
LED OFF –no corrections
27
ZED_GEOF_STAT_LED
Geofence status –User defined.
28
ZED_PPS_LED
PPS status. Time pulse.
The LED pulses at a rate of 1 Hz when the module has acquired valid GNSS time
data.
29
LTE_PIN33
Pin Reserved [10]
30
I2C_LTE_EN
LTE I2C level shift indicator
31
LTE_18_SCL
LTE I2C level shift lock
32
LTE_18_SDA
LTE I2C level shift data
33
ZED_TX2_NEO_RX2
UART TX ZED - UART RX NEO
34
ZED_RX2_NEO_TX2
UART RX ZED - UART TX NEO
35
VSIM
LET SIM card
36
SIM_IO
SIM I/O
37
SIM_CLK
SIM clock
38
SIM_RST
SIM reset
39
SIM_DET
SIM detection
40
CHGOK_LED
Turn on when the battery is charged (1.5 –2.2 VDC)
41
V_USB_IN
5 VDC input USB
Table 2: C214 Test points

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3Software
HPG software operates autonomously, configures all the modules, handles the different correction
data sources, and provides the correction data to the GNSS module. This is possible with the HPG
library [18] built on top of ubxlib for high-precision GNSS tailored projects.
Figure 9 shows the HPG data topology for each of the HPG use case examples.
Figure 9: HPG data topology showing use case configuration examples
3.1 HPG use case examples
In addition to the HPG library [18], the HPG software includes several examples that demonstrate the
handling of correction data from the u-blox modules in realistic scenarios and use cases, such as:
•Case 1: Correction data through L-band receiver
•Case 2: Correction data through cellular modem
•Case 3: Correction data through Wi-Fi connection
For further information about these and other use cases, see the Examples summary [17].

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3.2 u-blox library (ubxlib)
HPG software makes use of open-source u-blox library (ubxlib), which provides C libraries for
connecting the various u-blox modules and building embedded applications easily. The goal of ubxlib
is to deliver a single tested solution, with examples, which provides uniform easy-to-use APIs across
several u-blox products. Releases of ubxlib [23] are tested automatically for all configurations on
multiple boards in a test farm.
Figure 10 shows how ubxlib on the MCU host handles peripheral modules using serial line commands.
Figure 10: ubxlib MCU host and peripheral configuration
ubxlib interfaces with most common host SDKs and RTOS to simplify the development of embedded
applications for u-blox products and services. The ubxlib repository [23] is hosted on GitHub.
The library provides portable, high-level, C libraries that expose the available APIs for handling u-blox
short-range radio (Bluetooth/Wi-Fi), positioning (GNSS), and cellular (2G/3G/4G) modules.
ubxlib runs on the most common embedded platforms, including u-blox open CPU modules like
NINA-W106. For the full list of supported host platforms, refer to the GitHub ubxlib repository [23].

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4Module configuration
XPLR-HPG-2 comprises four u-blox modules:
•NINA-W106 short range radio as the controller and for Wi-Fi/Bluetooth connectivity
•ZED-F9R GNSS receiver
•NEO-D9S L-BAND receiver
•LARA-R6001D cellular module
See also Module integration.
4.1 NINA-W106 short range radio
The NINA-W106 multiradio module acts as the controller in the XPLR-HPG-2 kit. It connects to
ZED-F9R and NEO-D9S through the I2C bus and to LARA-R6 via the UART bus.
Customers can flash NINA-W106 with their own software or use one of the software examples
included in the XPLR-HPG-2 repository [16].
4.1.1 Configuring the I2C bus
NINA-W106 connects to ZED-F9R and NEO-D9S through the I2C bus. It assumes the role of the Main
node on the bus.
This I2C bus is also accessible through the QWIIC®connector (J6), which is suitable for connecting
additional 3.3 V sensor and other devices.
The triple solder jumper (JP3) can be cut to disable the onboard 2.2 kΩ pull-up resistors, as shown in
Figure 11. This procedure is necessary if the user connects a device with pull-up resistors.
Figure 11: Schematic circuit showing I2C pull-up resistors
☞The XPLR-HPG-2 provides the required power to the external QWIIC®devices. In this case, the
user shouldn’t power the QWIIC®devices from an external power source.

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NINA-W106 also connects to LARA-R6 through a 4- to 8-pin UART and additional GPIOs for
monitoring status information. Moreover, it can be connected to a microSD card using single SPI
communication through the microSD card socket. See also Figure 12.
Figure 12: microSD card socket signals
4.1.2 GPIO pin-out
Table 3 describes the function of the GPIO pins used in the NINA-W106 module. Some pins are
accessible from the J2, J5, J10 pin headers. Others are available from the three-pin header (J4) that
exposes the I2C bus (available on the bottom side of the board), the QWIIC®connector (J6), and the
10-pin 0.05” pitch JTAG header (J11) located on the bottom side of the connector.
NINA-W106
pin
ESP32 GPIO
Signal function
Available from
Notes
1
GPIO23
uSD_SDI / COPI
J10-2
SPI COPI connected to microSD.
2
GPI34
LTE_RXO
J5-9
UART to cellular. See also USB subsystem
4
GPI36
LTE_CTS
J5-7
UART to cellular. See also USB subsystem
5
GPIO33
LTE_RESET
J5-10
Resets the cellular modem, active LOW.
See also USB subsystem
7
GPIO32
uSD_CS
J10-1
SPI chip select (used by the microSD)
8
GPIO21
I2C_SDA
J4-2, J6-3
(QWIIC connector)
I2C SDA signal. NINA-W106 is the I2C controller that
connects to GNSS and L-band
11
GPI37
LTE_ON
-
Input to NINA-W106. Signals that the cellular modem
has powered on. Also connected to cellular status
LED “On”. See also USB subsystem
15
GPI38
uSD_DET
-
Input to NINA-W106. Signals that the microSD card
is inserted.
16
GPIO25
LTE_TXI
J5-8
UART to cellular. See also USB subsystem
17
GPIO26
LTE_PWR_ON
J5-11
Command to cellular to power on, active HIGH.
Different pulse duration for power on/off.
See also USB subsystem
18
GPIO27
LTE_RTS
J5-6
UART to cellular. See also USB subsystem
19
RESET_N
RESET
J11-10
(unpopulated
JTAG, bottom side)
NINA-W106 Reset
20
GPIO22
I2C_SCL
J4-3, J6-4
(QWIIC connector)
I2C SCL signal. NINA-W106 is the I2C controller,
connects to GNSS and L-band
21
GPIO19
uSD_SDO / CIPO
J10-4
SPI CIPO connected to microSD

XPLR-HPG-2 - User guide
UBX-23003719 - R02 Module configuration Page 20 of 32
C1-Public
NINA-W106
pin
ESP32 GPIO
Signal function
Available from
Notes
22
GPIO1
CDC_TX
-
USB CDC RX
23
GPIO3
CDC_RX
-
USB CDC TX
24
GPIO4
GPIO4 / CAN_RX
J2-2
Needs external CAN transceiver
25
GPIO2
LED / GPIO2
J2-1
Host status LED (blue)
27
GPIO0
BOOT / GPIO0
J2-4
BOOT button, USB CDC RTS/CTS.
See also Auto reset circuit.
28
GPIO5
GPIO5 / CAN_TX
J2-3
Needs external CAN transceiver.
29
GPIO18
uSD_SCK / SCK
J10-3
SPI CLK connected to microSD.
31
GPIO14
LTE_DCD
J5-4, J11-2
(unpopulated
JTAG, bottom side)
UART to cellular. See LARA-R6001D cellular modem.
JTAG JTMS. See JTAG connector
32
GPIO15
LTE_DTR
J5-5, J11-6
(unpopulated
JTAG, bottom side)
UART to cellular. See LARA-R6001D cellular modem
JTAG JTDO. See JTAG connector.
34
ADC34/GPI35
SYS_OUT_MON
-
Analog input, relative to SYS_OUT/Battery Voltage.
35
GPIO13
LTE_DSR
J5-2, J11-4
(unpopulated
JTAG, bottom side)
UART to cellular. See LARA-R6001D cellular modem
JTAG JTCLK. See JTAG connector.
36
GPIO12
LTE_RI
J5-3, J11-8
(unpopulated
JTAG, bottom side)
UART to cellular. See LARA-R6001D cellular modem
JTAG JTDI. See JTAG connector.
Table 3: NINA-W106 pinout
See also the NINA-W10 data sheet [1] and system integration manual [2].
4.1.3 Auto reset circuit
XPLR-HPG-2 board includes a typical auto reset circuit that connects to the BOOT0 and RESET pins
of NINA-W106, as shown in Figure 13. The circuit enables the programming tools (like esptool.py) to
assert the DTR and RTS control lines of the USB to Serial converter (CP2102N) and set NINA-W106
on the serial bootloader mode. More information can be found in the Espressif Automatic Bootloader
documentation [14].
Figure 13: Auto reset circuit
☞Capacitor C41 is not mounted on the C214 board but can be added in the application design –if
needed.