Ublox NINA-B4 Series, System Integration Manual, Page: 11 / 61

NINA-B4 series - System integration manual
UBX-19052230 - R09 Functional description Page 11 of 61
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The structure of any software running on either NINA-B4 module variant includes the following
components:
• Radio stack
• Bootloader (optional)
• Application software
Figure 3 shows the software architecture and implementation of software components for NINA-B40
and NINA-B41 modules:
• NINA-B40 modules host the customer application and optional bootloader software, developed
using the Nordic SDK, in an open-CPU configuration on the module. See also
Open CPU .
• NINA-B41 modules are pre-flashed with bootloader and u-connectXpress software that interfaces
through an AT command interpreter for control by customer application software running on host
MCUs. See also
u-connectXpress software .
• Both module variants include the Nordic S140 SoftDevice Bluetooth low energy protocol stack
that supports GATT client and server, central and peripheral roles, and multidrop connections.
Figure 3: NINA-B4 software structure
1.6.1 Open CPU
The open CPU architecture of NINA-B40 series modules allows module integrators to build their own
applications.
Table 5 describes the possible connectivity and application support that is enabled with
NINA-B40 hardware in the recommended Nordic SDK environment.
Feature Support
Development environment Nordic SDK (including Bluetooth Mesh
HomeKit, AirFuel, IoT, Thread, Zigbee)
HW interfaces 2 x UART