Integration Manual

NINA-B4 series - System integration manual
UBX-19052230 - R09 u-connectXpress software Page 41 of 60
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4 u-connectXpress software
NINA-B41 modules come preflashed with the u-connectXpress software and a bootloader.
To ensure that the module only boots with the original u-blox software, the secure bootloader initiates
a signature verification on the flashed software binary before it is booted.
NINA-B41 u-connectXpress software can be reflashed over the UART interface using AT commands
or the s-center client software available from the u-blox website.
4.1 Updating NINA-B41 software
New versions of NINA-B41 u-connectXpress software can be flashed to the module over the UART
interface. See also Updating software with -center and Updating software with AT commands.
The following pins should be made available as either headers or test points to flash the module:
• UART (RX, TX)
• RESET_N
• SWITCH_1 and SWITCH_2
4.1.1 Updating over UART
NINA-B4 u-connectXpress software includes the bootloader for flashing NINA-B4 over the UART
interface. The software is available for download at www.u-blox.com.
Distributed in a single ZIP container, the software includes two separate binary files and one JSON
file that includes the software label, software description, file name, version, flash address, image
size, image id, file permissions, and signature file reference for the SoftDevice and
ConnectivitySoftware applications:
• Java Script Object Notation:
NINA-B41X-CF-<version>.json. For example: NINA-B41X-CF-1.0.json
• ConnectivitySoftware:
NINA-B41X-SW-x.y.z-<build>.bin. For example: NINA-B41X-SW-3.0.0-005.bin
• SoftDevice:
NINA-S140-SD-a.b.c.bin. For example, NINA-S140-SD-6.1.1.bin
Signature files (NINA-B41X-SI-x.x.x-xxx.txt and NINA-S140-SI-x.x.x-xxx.txt) for each of the
binaries are also included in the container.
4.1.1.1 Updating software with s-center
⚠ To update NINA-B4 u-connectXpress requires s-center software version 4.6.2 or later. See also the
s-center user guide [22].
Procedure
1. Connect the supplied serial cable from the J8 connector on EVK-NINA-B4 to the USB port your
computer. For further information about setting up EVK-NINA-B4, see also EVK-NINA-B4 user
guide [24].
2. Download and the latest version of the s-center and u-connectXpress software from u-blox
Product Resources. See also the EVK-NINA-B4 user guide [24] and s-center user guide [22].
3. Start s-center and choose "USB Serial Port (COMx)" in the drop-down “COM Port” menu. All other
dialog settings are set to default.
4. Select Open Port. A series of AT commands and response are shown in the “Console Window”.