Ublox USB-ANNA-B4 User manual

USB-ANNA-B4 - User guide
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USB-ANNA-B4
USB for ANNA-B402 and ANNA-B412 modules
User guide
Abstract
This document describes how to set up the USB-ANNA-B4 evaluation kit to evaluate ANNA-B4 series
standalone Bluetooth®5.1 low energy modules. It also describes the different options for debugging
and testing the development capabilities included supported by the evaluation board.

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Document information
Title
USB-ANNA-B4
Subtitle
USB for ANNA-B402 and ANNA-B412 modules
Document type
User guide
Document number
UBX-22008565
Revision and date
R01
26-Sep-2022
Disclosure restriction
C1-Public
This document applies to the following products:
Product name
Type number
Firmware version
PCN reference
USB-ANNA-B402
USB-ANNA-B402-00
N/A
-
USB-ANNA-B412
USB-ANNA-B412-00
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.....................................................................................................................4
1.1 Key features ......................................................................................................................................................... 4
1.2 USB-ANNA-B4 block diagram......................................................................................................................... 5
1.3 Connectors........................................................................................................................................................... 5
2Setting up the evaluation board ...............................................................................................6
2.1 Evaluation board setup..................................................................................................................................... 6
2.1.1 Software and power prerequisites ....................................................................................................... 6
2.1.2 Assigning COM ports ............................................................................................................................... 6
2.2 Software and flashing....................................................................................................................................... 6
2.2.1 USB-ANNA-B412....................................................................................................................................... 6
2.2.2 USB-ANNA-B402....................................................................................................................................... 7
3Interfaces and peripherals .........................................................................................................8
3.1 Buttons and LEDs .............................................................................................................................................. 8
3.2 USB to UART interface ..................................................................................................................................... 8
3.3 I2C temperature sensor ................................................................................................................................... 8
Appendix ..............................................................................................................................................9
ASchematic and assembly drawing ............................................................................................9
BGlossary ...................................................................................................................................... 10
Related documents ......................................................................................................................... 11
Revision history ............................................................................................................................... 11
Contact.............................................................................................................................................. 11

USB-ANNA-B4 - User guide
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1Product description
USB-ANNA-B4 is an evaluation board with a USB form factor. Accommodated within a standard USB
stick that plugs directly into the USB port on your computer, the board allows quick prototyping of a
variety of extremely low-powered Internet of Things (IoT) applications. USB-ANNA-B4 supports the
full Bluetooth Core specification v5.1 and IEEE 802.15.4 standard.
USB-ANNA-B4 boards are available in two variants to accommodate alternative software solutions:
•USB-ANNA-B402 –includes an Open CPU ANNA-B402 module with an internal, 2.4 GHz antenna
(integrated in the SiP).
•USB-ANNA-B412 –includes an ANNA-B412 module with pre-flashed u-connectXpress software
and an internal, 2.4 GHz antenna (integrated in the SiP).
Figure 1: USB-ANNA-B402/B412 evaluation board
USB-ANNA-B4 evaluation boards support the SEGGER J-Link debug interface that can be used with
the Open CPU, ANNA-B402, variants of the USB stick.
The manufacturer of the nRF52833 SoC, Nordic Semiconductor, provide a free Software
Development Kit (SDK) that includes a broad selection of drivers, libraries, and example applications
that can be used for rapid prototyping.
USB-ANNA-B4 USB evaluation sticks include an FTDI chip that converts USB data to UART data for
module communication and require download of the FTDI driver. USB sticks integrating ANNA-B412
u-connectXpress module variants are preferably controlled using s-center evaluation software [7].
USB-ANNA-B4 software and documentation is available at www.u-blox.com/evk-search.
1.1 Key features
The USB-ANNA-B4 Bluetooth Low Energy has the following features and interfaces:
•Full Bluetooth 5.1 functionality
•802.15.4 PHY
•I2C interface
oA temperature sensor, LM75B, is available on the I2C interface.
•USB-ANNA-B412 supports u-connectXpress software for accelerated time to market
•USB-ANNA-B402 with Open CPU for embedded application development
•Full UART to USB converter with a virtual COM port for control of the extended UART features of
the u-connectXpress software
•On-board J-link 6-Pins-Needle connector
•RGB LED
•Reset push button
•SW2 for Reset of UART settings or connection trigger in u-connectXpress

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1.2 USB-ANNA-B4 block diagram
Figure 2 shows the major interfaces and internal connections supported on the USB-ANNA-B4.
Figure 2: USB-ANNA-B4 block diagram
1.3 Connectors
Table 1 describes the available connectors of the USB-ANNA-B4, as shown in Figure 3.
Connector
Function
Description
J1
USB power supply
5 V USB power supply
J2
Cortex debug connector
J-link 6-Pin Needle Adapter used to connect external debuggers to the
ANNA-B402 module. ANNA-B402 modules support Serial Wire debug
(SWD) and Serial Wire Viewer, but not JTAG debug.
Table 1: USB-ANNA-B4 connector descriptions
Figure 3: Available connectors, pinout, and designators

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2Setting up the evaluation board
2.1 Evaluation board setup
USB-ANNA-B402 is intended for the purpose of customer software development. In addition to the
SWD interface, it includes a bootloader that can be used to flash the board.
USB-ANNA-B412 is delivered with pre-installed u-connectXpress software and can only be used via
the UART interface that is made available when plugging in the device.
Software and power prerequisites
1. Before connecting the USB board, download and install the latest u-blox s-center evaluation
software from the u-blox website (required for USB-ANNA-B412 only)
2. Plug in USB-ANNA-B4 to the USB host.
The operating system installs the correct drivers automatically. The drivers need only be installed
once when you connect the unit to a new computer.
⚠If the drivers are not installed automatically, download the FTDI driver FT234XD-R
Assigning COM ports
A COM port is automatically assigned to the device by Windows:
•The COM port labelled “USB Serial Port”is used to communicate with the UART interface of the
USB-ANNA-B4.
Windows 7
To view assigned COM ports in Windows 7:
1. Open the Control Panel and select Hardware and Sound.
2. Open the Device Manager in Devices and Printers. This opens the Device Manager window
where you can view the assigned COM ports.
Windows 10
To view assigned COM ports in Windows 10:
1. Right click the Windows Start button.
2. Select Device Manager.
2.2 Software and flashing
USB-ANNA-B412
USB-ANNA-B412 includes an ANNA-B412 module running u-connectXpress software. The software
is preinstalled on the module.
☞For the latest software go https://www.u-blox.com. Instructions for reflashing ANNA-B4
modules can be found in the Software section of the ANNA-B4 system integration manual [1].
The same procedure is applicable for USB-ANNA-B412 evaluation boards.

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2.2.1.1 s-center evaluation software
s-center is convenient to use together with ANNA-B412 when running the AT commands supported
in u-connectXpress. It also includes predefined functions. Install s-center evaluation software [7] and
set the baud rate to 115200 with 8N1 configuration and flow control. All available AT commands are
described in the u-connectXpress AT commands manual [3].
To get started with the u-connectXpress software for USB-ANNA-B412, see the user guide [5].
USB-ANNA-B402
ANNA-B402 is the Open CPU variant of ANNA-B4. You can use the legacy Nordic SDK or nRF Connect
SDK for application development, but the latter is recommended for use with the USB-ANNA-B402
evaluation board.
2.2.2.1 nRF Connect SDK
The nRF Connect SDK allows developers to include new features, such as Bluetooth Direction Finding
and Bluetooth LE Audio, into customer applications. To use USB-ANNA-B402 together with the
Zephyr-based nRF Connect SDK:
•Create your own board definition
•Build the examples in the nRF Connect SDK to use this board definition
For more information about performing these tasks, see the Software section of the ANNA-B4
system integration manual [1]. Reference code for u-blox Open CPU modules is available from the
u blox short range open CPU github repository [6].
2.2.2.2 Nordic Semiconductor SDK
The older (not recommended for new designs) nRF5 SDK is natively a “bare-metal” kit that does not
depend on a Real Time Operating System (RTOS). Notably, new features beyond Bluetooth LE 5, like
Bluetooth Direction Finding and Bluetooth LE Audio, are not supported in this SDK.
To use the USB-ANNA-B402 together with the legacy Nordic Semiconductor SDK:
•Create your own board file
•Adapt the examples in the Nordic Semiconductor SDK to use this board file
For more information about these tasks, see the Software section of the ANNA-B4 system
integration manual [1]. See also the u-blox short range open CPU github repository [6].
2.2.2.3 Software debug options
To debug using the onboard J-Link connector on USB-ANNA-B402, use an external debugger
connected to the J-link 6-Pin Needle Adapter with the SEGGER J-Link software [4] .
2.2.2.4 Flashing software
USB-ANNA-B402 can be flashed using the J-link connector or over UART using the preflashed
bootloader on the ANNA-B402 module. See also the ANNA-B4 SIM [2].

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3Interfaces and peripherals
3.1 Buttons and LEDs
Figure 4: Position of the push buttons and LEDs on the evaluation board
Annotation
Function
Description
RST
Reset
button
Connected directly to the ANNA RESET_N pin.
SW2
SWITCH_2
With u-connectXpress this button can be used to reset UART settings.
☞See also the ANNA-B412 data sheet [1].
Table 2: USB-ANNA-B4 button
Annotation
Function
Description
D2
Power Good Led
Indicates when 3V3 voltage is applied
D3
RGB LED
Connected to the ANNA RED (GPIO_31), GREEN (GPIO_32) and BLUE (GPIO_33) pins.
The RGB LED shows the status for u-connectXpress. See also the u-connectXpress
user guide [5] for details.
☞See also the ANNA-B412 data sheet [1].
Table 3: USB-ANNA-B4 LED indicators
3.2 USB to UART interface
A serial COM port is available if the USB board is connected to a PC using the USB connector J1.
3.3 I2C temperature sensor
USB-ANNA-B4 has an LM75B temperature sensor mounted on the PCB. This sensor measures the
environmental temperature and can be addressed using the I2C address 0x48.

USB-ANNA-B4 - User guide
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Appendix
ASchematic and assembly drawing
Figure 5 USB-ANNA-B4 schematic
Figure 6 USB-ANNA-B4 assembly drawing –top view

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BGlossary
Abbreviation
Definition
EVK
Evaluation kit
GND
Ground
GPIO
General-Purpose Input/Output
I2C
Inter-Integrated Circuit
LED
Light-Emitting Diode
SiP
System in Package
UART
Universal Asynchronous Receiver/Transmitter
USB
Universal Serial Bus
Table 4: Explanation of the abbreviations and terms used

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Related documents
[1] ANNA-B412 data sheet, UBX-21028698
[2] ANNA-B4 series system integration manual, UBX-21000517
[3] Short range AT commands manual, UBX-14044127
[4] SEGGER J-Link software - https://www.segger.com/jlink-software.html
[5] u-connectXpress user guide, UBX-16024251
[6] https://github.com/u-blox/u-blox-sho-OpenCPU
[7] s-center user guide, UBX-16012261
☞For product change notifications and regular updates of u-blox documentation, register on our
website, www.u-blox.com.
Revision history
Revision
Date
Name
Comments
R01
26-Sep-2022
dspa, lber, mape
Initial release
Contact
For further support and contact information, visit us at www.u-blox.com/support.