Ublox XPLR-HPG-1 User manual

UBX-23000692 - R01
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XPLR-HPG-1
High Precision GNSS evaluation platform
User guide

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Document information
Title
XPLR-HPG-1
Subtitle
High Precision GNSS evaluation platform
Document type
User guide
Document number
UBX-23000692
Revision and date
R01
1-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-1
XPLR-HPG-1
-
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
1Product description ..............................................................................................................................5
1.1 Overview........................................................................................................................................................5
1.2 Module integration .....................................................................................................................................7
1.3 Kit includes ...................................................................................................................................................8
1.4 Features........................................................................................................................................................9
1.5 Correction data use cases.........................................................................................................................9
1.5.1 Case #1: Correction data over L-band satellite ..........................................................................10
1.5.2 Case #2: Correction data over Cellular .........................................................................................11
1.5.3 Case #3: Correction data over Wi-Fi .............................................................................................12
2Hardware description........................................................................................................................ 13
2.1 C213 baseboard ........................................................................................................................................13
2.1.1 Block diagram ....................................................................................................................................14
2.1.2 Power subsystem .............................................................................................................................14
2.1.3 NORA-W106 ......................................................................................................................................16
2.1.4 USB ......................................................................................................................................................17
2.1.5 MikroBUS............................................................................................................................................18
2.1.6 MicroSD ..............................................................................................................................................19
2.1.7 Qwiic ....................................................................................................................................................20
2.1.8 Buttons ...............................................................................................................................................20
2.1.9 Test Points.........................................................................................................................................21
2.1.10 LEDs ....................................................................................................................................................23
2.1.11 RGB LED..............................................................................................................................................24
2.1.12 Wheel tick and Direction .................................................................................................................25
2.2 Click boards ................................................................................................................................................27
2.2.1 GNSS RTK 2 .......................................................................................................................................27
2.2.2 LBAND RTK........................................................................................................................................28
2.2.3 4G LTE 2 .............................................................................................................................................28
3Software ................................................................................................................................................ 29
3.1 HPG use case examples...........................................................................................................................29
3.2 u-blox library (ubxlib) ................................................................................................................................30
4Getting started.................................................................................................................................... 31
4.1 Connecting the antennas........................................................................................................................31
4.2 Inserting the MicroSD card .....................................................................................................................31
4.3 Inserting the SIM and battery ................................................................................................................31
4.4 Mounting the Click boards ......................................................................................................................33
4.5 Assembling the enclosure.......................................................................................................................34
4.6 Using the kit with the captive web portal ............................................................................................35
Appendix ....................................................................................................................................................... 36

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AGlossary ................................................................................................................................................. 36
Related documentation ........................................................................................................................... 37
Revision history.......................................................................................................................................... 37
Contact.......................................................................................................................................................... 37

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1Product description
The XPLR-HPG-1 kit offers a flexible evaluation platform with which to explore possible application
scenarios using the PointPerfect augmentation service.
The platform accesses correction data from satellite broadcasts using an L-band satellite GNSS
receiver or through IP connectivity using Wi-Fi or LTE.
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. See also Correction data
Figure 1 shows the platform topology and data communication between each system component.
Figure 1: XPLR-HPG-1 platform topology
1.1 Overview
Including a single (C213) baseboard that comprises the NORA-W106 standalone radio module and
supplied MIKROE Click boards™hosting the u-blox positioning (ZED-F9R, NEO-D9S) and cellular
(LARA-R6) modules. With over 1400 other Click boards to choose from, developers can explore the
endless possibilities for combining u-blox modules with the functionality offered by other technology
suppliers –using the same kit. Simply plug the modules you want to try into an available mikroBUS
connector.

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The board assemblies included in the XPLR-HPG-1 kit are shown in Figure 2.
Figure 2: XPLR-HPG-1 board assemblies

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1.2 Module integration
XPLR-HPG-1 integrates the following positioning, cellular, and short-range radio modules:
•ZED-F9R high precision dead reckoning module [3]: 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 [4]: Processes the correction data necessary for
correcting satellite and atmospheric errors. The module processes external corrections to
compensate for various imperfections called GNSS errors, with:
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 [5]: 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
•NORA-W10 stand-alone multiradio module [2], including:
oWi-Fi 4 (802.11b/g/n) and Bluetooth Low Energy v5.0 connectivity
oInternal PCB trace antenna
oPowerful open CPU for advanced customer applications
oSmall footprint and multiple antenna options

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1.3 Kit includes
Part
Description
Outline
C213 baseboard
1x C213 baseboard with mounted NORA-W106 stand-alone,
multiradio module [2]
GNSS RTK 2
Click board
1x GNSS RTK 2 Click board [6] featuring the ZED-F9R multi-band
GNSS module [3] for high-precision GNSS positioning
4G LTE 2
Click board
1x 4G LTE 2 Click board [8] featuring the LARA-R6 LTE Cat 1 cellular
module [5] for Internet of Things (IoT) and Machine to Machine
(M2M) applications
LBAND RTK
Click board
1x LBAND RTK Click board [7] featuring the NEO-D9S satellite
receiver for L-band correction [4]
GNSS antenna
1x GNSS antenna –connects to SMA connector on GNSS RTK 2 Click
board
L-band antenna
1x L-band antenna –connects to SMA connector on LBAND RTK
Click board
LTE antennas
2x LTE antennas –connect to SMA connectors on 4G LTE 2 Click
board
Enclosure
1x enclosure
USB-C to USB-A
cable
1x type USB-C to USB-A cable
Thingstream
promo code
Thingstream promo code with one month of free access to the
PointPerfect IP service
Application
software
example
Application software example in source code
AssistNow
AssistNow A-GNSS services

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1.4 Features
XPLR-HPG-1 features include:
•3x mikroBUS™connectors for plugging up to three Mikroe Click boards™, including the supplied
GNSS RTK 2, 4G LTE 2, LBAND RTK boards
•18650 Li-Ion battery holder accommodating one single-cell Li-ion battery - for easier evaluation in
the field (battery not included)
•Battery over-current, over-voltage, under-voltage protection circuits
•On-board battery charging circuit
•USB-to-UART converter exposed on USB-C connector –for easy communication and programming
with NORA-W106. Use the same connector to power the system and charge the battery.
•Native NORA-W106 USB exposed on USB-C connector. Use the same connector to power the
system and charge the battery.
•Qwiic® connector for evaluating external sensors
•RGB status LED
3x buttons for basic functions (Reset, BTN1, and BTN2)
•Wheel tick / direction signal with signal conditioning circuitry
•MicroSD card connector used for logging and persistent memory
•Application software example included in source code
•PointPerfect GNSS augmentation service (1-month free trial account)
•AssistNow A-GNSS services
1.5 Correction data use cases
XPLR-HPG-1 can receive correction data over Wi-Fi or Cellular radio links via Thingstream correction
service. The NORA-W106 radio module, mounted on the C213 baseboard, provides the Wi-Fi
interface, manages the decryption keys, and handles the receipt of GNSS correction data.
To use the u-blox software solution available on GitHub, the supplied Click boards, GNSS RTK 2
(ZED F9R), L-band RTK (NEO-D9S), and LTE 2 (LARA-R6), must be plugged into specific MikroBUS
connectors on the C213 baseboard to suit the chosen use case configuration.
The following use cases describe three use cases from the u-blox software:
•Case #1: Correction data over L-band satellite
•Case #2: Correction data over Cellular
•Case #3: Correction data over Wi-Fi

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1.5.1 Case #1: Correction data over L-band satellite
In this scenario, the NEO-D9S module, hosted on the L-band RTK Click board, receives correction data
from L-band satellites. NEO-D9S frequency range is 1525 MHz to 1559 MHz. The acquired correction
data is transmitted to the NORA-W106 module via the I2C interface.
As a pre-requisite for using this configuration, it is necessary to physically stack the ZED-F9R Click
board on top of the NEO-D9S. In this way, the modules share correction data with NORA-W106 over
I2C. This means that NORA-W106 is not involved in the computation of correction data between NEO
D9S to ZED F9R.
The active components in this use case are highlighted red in Figure 3.
Figure 3: Correction data flow (L-band)
NORA-W106 forwards the decryption keys for the correction data packages to ZED-F9R. The
decryption keys, which change monthly, can be downloaded from the internet using the Message
Queuing Telemetry Transport (MQTT). The keys are downloaded over the Wi-Fi/Bluetooth connection
through NORA-W106 or otherwise over a cellular connection through other third-party Click boards.
For the example software, build instructions, and description of this use case configuration, see also
Correction data via NEO-D9S LBAND module to ZED-F9R with the help of MQTT (using certificates).

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1.5.2 Case #2: Correction data over Cellular
In this scenario, the flow starts when the LARA-R6 modem (hosted on the 4G LTE 2 Click board)
acquires correction data and the decryption keys through the cellular network using an MQTT
connection. After that, NORA-W106 requests the correction data via the UART interface and then
forwards to the GNSS RTK 2 Click board (ZED-F9R) through the I2C interface. Moreover, the NORA-
W106 module also addresses the decryption keys for the correction data packages to ZED-F9R.
The active components in this use case are highlighted red in Figure 4.
Figure 4: Correction data flow (LTE Cat1 modem)
☞The GNSS RTK 2 Click board (ZED-F9R) can work with the UART or I2C interfaces. On the C213
baseboard, the UART interface is available on the microbus 1 and 2 slots. NORA-W106 does not
support UART on microBUS 3.
For the example software, build instructions, and description of this use case configuration, see also
Correction Data over MQTT from Thingstream Point Perfect Service (manual).

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1.5.3 Case #3: Correction data over Wi-Fi
In this scenario, the Wi-Fi MCU NORA-W106 receives the correction data and the decryption keys
through a Wi-Fi network using an MQTT connection. Next, the correction data and the decryption keys
are forwarded to the ZED-F9R module (hosted on the GNSS RTK 2 Click board) over the I2C interface.
The active components in this use case are highlighted red in Figure 5.
Figure 5: Correction data flow (Wi-Fi)
☞The GNSS RTK 2 Click board (ZED-F9R) communicates correction data over the UART or I2C
interfaces. The C213 baseboard supports a UART interface on microBUS slots 1 and 2.
NORA-W106 does not support UART on microBUS 3.
For the example software, build instructions, and description of this use case configuration, see also
Correction data via Wi-Fi MQTT to ZED-F9R using certificates.

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2Hardware description
2.1 C213 baseboard
Figure 6 shows the supported physical interfaces and other key components on the C213 baseboard,
including:
•NORA-W106 stand-alone multiradio module (U1)
•3x mikroBUS™connectors (MB1, MB2, and MB3) for plugging up to three Mikroe Click boards™,
including the GNSS RTK 2, 4G LTE 2, and LBAND RTK Click boards supplied with the kit.
•18650 Li-Ion battery holder for accommodating one single-cell Li-ion battery (BATT1)
•USB-to-UART converter exposed on USB-C connector for easy communication and programming
with NORA-W106, system power and battery charging (J6_2)
•Native NORA-W106 USB-C connector exposing USB, system power and battery charging (J6_1)
•Qwiic® connector for evaluating external sensors (J22)
•User-defined LED (RGB)
•3x buttons for basic functions (NORA Reset, BTN1, and BTN2)
•Wheel tick / direction connector (J2)
•MicroSD card connector (J1)
Figure 6: C213 baseboard assembly

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2.1.1 Block diagram
Figure 2 shows the interfaces between the logical components of the C213 baseboard, including the
host NORA-W106 multiradio module, power subsystem, USB, MicroSD, mikroBUS, Qwiic, and signal
conditioning interfaces.
Figure 7: XPLR-HPG-1 block diagram
2.1.2 Power subsystem
XPLR-HPG-1 can be powered by either of the USB-C connectors (UART USB or NORA USB) or the
on-board battery, as shown in Figure 8.
Figure 8: XPLR-HPG-1 power subsystem

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Power from the USB-C connectors go through a dual-input linear Li+/Li-Poly battery charger. The
charger can use the power sources available (USB-C connectors and battery) to supply the
consumption of the board and the additional Click boards. The output of the charger circuit is used by
a DC-to-DC boost converter that is responsible for supplying 5 V to the board. There is also a linear
power supply that is responsible for supplying the 3.3 V.
2.1.2.1 Battery charger
XPLR-HPG-1 is equipped with a MAXIM MAX8934 dual-input linear charger for Li+/Li-Poly 1 cell
battery. The charger is supplied by either the USB-C UART (J6_2) or the USB-C NORA (J6_1). If both
USB-C are connected, the USB UART takes precedence (with regards to power supply). Input current
is limited to 2 A and the charging current is limited to 1.35 A. When the input current is reached, first
the battery charging current is limited, then the charging stops, and if the power demand is even
greater, the battery is connected to support the load.
2.1.2.2 Battery
An unprotected, flat top 18650 (one cell) Li-Ion/Li-poly battery can be used for powering up the XPLR-
HPG-1. Insert the battery in the BATT1 battery holder. Polarity of the battery should follow the
silkscreen of the PCB. See also Figure 9. The battery is charged whenever a USB-C is connected and
whenever there is excessive power to the system. The yellow “CHARGE” LED is lit when battery is
charging.
⚠XPLR-HPG-1 is designed to work exclusively with 18650 cells that feature an “unprotected, flat
top” configuration, for example, the LG HG2 INR18650, Samsung INR18650 or other variants. It is
advisable to use Li-Ion batteries (rechargeable) Implementing an incompatible cell can seriously
damage both the XPLR-HPG-1 kit itself and the battery unit. The battery is not included in the
XPLR-HPG-1 kit.
Figure 9: Battery holder, polarity
Figure 10: Battery LEDs

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2.1.2.3 Battery protection
The evaluation board includes an on-board circuit that protects against overcurrent, over voltage and
under voltage. SW1 (battery connect/disconnect switch) switches the battery connection circuit
connects and disconnects the battery from the board circuit. Figure 11 shows SW1 “battery connect”
and “battery disconnect” positions.
When in “battery disconnect”position, power for the system is only drawn from one of the two USB-C
connectors. In this configuration the battery is not charged.
In the “battery connect”position, power for the system is drawn from the USB-C. If more power is
needed than what USB-C can provide, then battery is used to supply the excessive power. If there is
excessive power on the USB-C, it is used to charge the battery.
Figure 11: SW1 (battery connect switch) positions
☞Every time the battery is physically removed from the holder, the battery protection circuit
changes to disconnect state (for battery saving reasons). To change to normal state again, a
connection with an external charger should be done.
2.1.3 NORA-W106
NORA-W106 can be programmed with the main application code. Table 1 describes the connections
of NORA-W106 to different functions.
NORA-W106 pin
ESP32-S3 GPIO
Function
F7
GPIO0 / Boot
BOOT0/BUTTON-1
C8
GPIO21
BUTTON-2
A3
GPIO17 (A)
I2C-SCL
B4
GPIO18 (A)
I2C-SDA
H9
GPIO8 (A)
LED-B
H8
GPIO2 (A)
LED-G
J8
GPIO5 (A)
LED-R
E8
GPIO1 (A)
MB1-AN
D8
GPIO4 (A)
MB1-INT
E9
GPIO7 (A)
MB1-PWM
E7
GPIO9 (A)
MB1-RST

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NORA-W106 pin
ESP32-S3 GPIO
Function
J9
GPIO3 (A)
MB1-RX
H7
GPIO46
MB1-TX
G3
FSPIIO5 / GPIO11 (A)
MB2-AN
J2
JTAG_TCK / GPIO39
MB2-INT
H3
FSPII04 / GPIO10 (A)
MB2-PWM
F3
SPICLK_P / GPIO47
MB2-RST
E3
SPICLK_N / GPIO48
MB2-RX
D3
FSPIHD / GPIO33
MB2-TX
G2
FSPIIO6 / GPIO12 (A)
MB3-AN
H2
JTAG_TMS / GPIO42
MB3-INT
G1
MTDO / GPIO40
MB3-PWM
H1
JTAG_TDI / GPIO41
MB3-RST
J3
RESET_N
RESET_N
C1
FSPIQ / GPIO37
SPI-CIPO
B1
FSPICLK / GPIO36
SPI-CLK
C2
FSPID / GPIO35
SPI-COPI
B3
FSPICS0 / GPIO34
SPI-CS0
A2
FSPIWP / GPIO38
SPI-CS1
A5
FSPIDQS / GPIO14 (A)
SPI-CS2
A6
FSPIIO7 / GPIO13 (A)
SPI-CS3
F9
GPIO6 (A)
UART0-CTS
F8
GPIO45
UART0-RTS
G9
U0RXD / GPIO44
UART0-RXD
G8
U0TXD / GPIO43
UART0-TXD
D9
USB_N / GPIO19
USB-D-
C9
USB_P / GPIO20
USB-D+
B6
XTAL_32K_N / GPIO16 (A)
WT/DIR-DIR
C6
XTAL_32K_P / GPIO15 (A)
WT/DIR-WT
Table 1: NORA-W106 pad connections
2.1.4 USB
2.1.4.1 NORA USB (J6_1)
USB-C connector (J6_1) is connected directly to pins C9, D9 of NORA-W106. Power supply is
connected to the secondary input of the battery charger IC. This port is the native NORA-W106 can
be used to communicate directly through USB.
2.1.4.2 UART USB (J6_2)
UART USB-C connector (J6_2) is connected to a Silicon Labs CP2102N-A02-GQFN24 USB-to-UART
bridge. It is connected to pins G8, G9, F8 and F9 (UART0 of NORA-W106) as shown in Table 2.
NORA-W1 pin
ESP32-S3 GPIO
Function
F8
GPIO45
UART0-RTS
F9
GPIO6 (A)
UART0-CTS
G8
U0TXD / GPIO43
UART0-TXD
G9
U0RXD / GPIO44
UART0-RXD
Table 2: NORA-W1 USB to UART bridge connections

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XPLR-HPG-1 supports an auto reset circuit connected to the BOOT0 and RESET pins of NORA-W106,
as shown in Figure 12. This circuit enables programming tools like the esptool.py to assert the DTR
and RTS control lines of the USB to Serial converter (CP2102N) and set NORA-W106 on the serial
bootloader mode. See also Espressif ESP32 Automatic Bootloader documentation [9].
Figure 12: NORA-W106 auto reset circuit
2.1.5 MikroBUS
XPLR-HPG-1 board has three MikroBUS connectors with available space to nestle three large size
Click boards. Each MikroBUS connector exposes:
•3x GPIOs (RESET, PWM, INT)
•1x analog input (AN)
•1x UART (2 wire)
•1x I2C bus
•1x SPI bus with one CS (chip select) line for each mikroBUS slot
For further information about the mikroBUS standard, visit the mikroBUS website [10].
⚠Connecting a third-party Click board with IOs referenced at 5 V can seriously damage because the
board. The NORA-W106 I/Os and the Click boards provided in the XPLR-HPG-1 kit are referenced
at 3.3 V.
Table 3 shows the mikroBUS pin connections.
mikroBUS 1
mikroBUS 2
mikroBUS 3
mikroBUS pin
NORA-
W106
ESP32-S3
GPIO
NORA-
W106
ESP32-S3
GPIO
NORA-
W106
ESP32-S3
GPIO
1 - AN
E8
GPIO1 (A)
G3
FSPIIO5 / GPIO11 (A)
G2
GSPIIO6 / GPIO12 (A)
2 - RST
E7
GPIO9 (A)
F3
SPICLK_P / GPIO47
H1
JTAG_TDI / GPIO41
3 - SPI-CS
A2
FSPIWP / GPIO38
A5
FSPIDQS / GPIO14 (A)
A6
FSPIIO7 / GPIO13 (A)
4 - SPI-SCK
B1
FSPICLK / GPIO36
B1
FSPICLK / GPIO36
B1
FSPICLK / GPIO36
5 - SPI-CIPO
C1
FSPIQ / GPIO37
C1
FSPIQ / GPIO37
C1
FSPIQ / GPIO37
6 - SPI-COPI
C2
FSPID / GPIO35
C2
FSPID / GPIO35
C2
FSPID / GPIO35
7 - 3.3 V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
8 - GND
GND
GND
GND
GND
GND
GND
9 - GND
GND
GND
GND
GND
GND
GND
10 - 5V
5V
5V
5V
5V
5V
5V
11 - I2C-SDA
B4
GPIO18 (A)
B4
GPIO18 (A)
B4
GPIO18 (A)
12 - I2C-SCL
A3
GPIO17 (A)
A3
GPIO17 (A)
A3
GPIO17 (A)

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mikroBUS 1
mikroBUS 2
mikroBUS 3
mikroBUS pin
NORA-
W106
ESP32-S3
GPIO
NORA-
W106
ESP32-S3
GPIO
NORA-
W106
ESP32-S3
GPIO
13 - RX
J9
GPIO3 (A)
E3
SPICLK_N / GPIO48
-
-
14 - TX
H7
GPIO46
D3
FSPIHD / GPIO33
-
-
15 - INT
D8
GPIO4 (A)
J2
JTAG_TCK / GPIO39
H2
JTAG_TMS / GPIO42
16 - PWM
E9
GPIO7 (A)
H3
FSPII04 / GPIO10 (A)
G1
MTDO / GPIO40
Table 3: mikroBUS pins to NORA-W106
☞Due to restrictions of available UART ports on ESP32-S3, RX and TX on mikroBUS 3 are not
connected.
2.1.6 MicroSD
The C213 baseboard supports a MicroSD card slot that is connected to the SPI bus exposed on the
mikroBUS slots. The microSD card can be accessed through single SPI. A circuit that multiplexes the
card chip select pin with the card detect pin is also supported. The circuit employs an open-drain NOT
gate that supports the following functionality:
•When the MicroSD card is not inserted, the card detect signal (CD) is high and the SPI chip select
(microSD_CS) is pulled low by the NOT gate.
•When the MicroSD card is inserted, card detect signal (CD) is low and uSD_CS is left floating by
the NOT gate and can function normally as a CS signal.
Figure 13 shows the circuit diagram of the MicroSD card slot and card detect circuit.
Figure 13: MicroSD card slot and card detect circuit

XPLR-HPG-1 - User guide
UBX-23000692 - R01 Hardware description Page 20 of 37
C1-Public
The NORA-W106 module can check if the CS0 signal is low. If it is low, then there is no card at the
MicroSD card slot and can set an interrupt to the pin to be notified for a card insertion event. If the
CS0 signal is high, then the card is inserted, and can proceed to initialize the SPI peripheral.
Table 4 describes the pins used on the MicroSD card slot.
NORA-W106 pad
ESP32-S3 GPIO
Function
C1
FSPIQ / GPIO37
SPI-CIPO
B1
FSPICLK / GPIO36
SPI-CLK
C2
FSPID / GPIO35
SPI-COPI
B3
FSPICS0 / GPIO34
SPI-CS0 / CARD DETECT
Table 4: NORA-W106 to MicroSD connections
2.1.7 Qwiic
XPLR-HPG-1 board has a standard Qwiic connector (J22) for connecting external I2C devices of the
Qwiic ecosystem. The interface includes two 2.2 kΩpull-up resistors referenced to 3.3 V on the SDA
and SCL signals. The signals are shown on each mikroBUS slot.
Figure 14: Qwiic connector
2.1.8 Buttons
XPLR-HPG-1 supports three buttons (RESET, BTN1, and BTN2). The schematic circuit of these
buttons is shown in Figure 15. The buttons are accessible from the front side of the PCB.
Figure 15: XPLR-HPG-1 buttons
Table 5 describes the connections to NORA-W106 and the functionality of each button.