NINA-B4 series - System integration manual
UBX-19052230 - R06 u-connectXpress software Page 34 of 45
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4 u-connectXpress software
NINA-B41 modules come preflashed with the u-connectXpress software and a boot loader.
To ensure that the module only boots with the original u-blox software, the secure boot loader 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 Flashing NINA-B41 u-connectXpress software
NINA-B41 modules can be reflashed with AT commands over the UART interface whenever a new
version of the u-connectXpress software is available.
NINA-B41 u-connectXpress software is distributed in a.zip container that contains two compressed
binary files:
• Application software
NINA-B41X-SW-x.y.z-<build>.bin (Example: NINA-B41X-SW-1.0.0-001.bin)
• SoftDevice radio stack software
NINA-S140-SD-a.b.c.bin (Example: NINA-S140-SD-7.2.0.bin)
A signature file for each of the above-mentioned files is also included, as well as a .json header file.
☞ More information about the features, capabilities and use of connectXpress, see the
u-connectXpress user guide [17] and u-connect AT commands manual [6].
4.1.1 Software flashing using s-center
The s-center client is distributed as an executable file that can be downloaded from the u-blox
website. Having installed the software on your workstation, follow the procedure below to flash
NINA-B41 with s-center.
☞ Flashing of u-blox software requires s-center software version 5.2 or later. For more information
about using s-center, see the s-center user guide [22].
1. Select Tools > Software Update
as shown in the following screenshot:
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