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u-blox NINA-B4 Bluetooth Low Energy Module

Geared for harsh professional environments

NINA-B4 Summary

  • Indoor location
    • Bluetooth 5.1 with direction finding functionality
    • Increased position accuracy
    • Angle-of-Arrival / Angle-of-Departure
  • Support for 105 °C
    • Harsh industrial environments
    • Lighting installations
  • Seamless migration from NINA-B3
    • Same mechanical dimensions
    • Common footprint
    • u-connect API

u-blox — NINA-B4 Key Feature Summary

NINA-B4 Introduction

The main highlight of the NINA-B4 series is Bluetooth’s new direction finding feature, a key component of the Bluetooth v5.1 specification that brings the benefits of high precision positioning to indoor applications. NINA-B4 is the first u‑blox module designed to act as both a transmitter and a receiver in angle of arrival (AoA) and angle of departure (AoD) direction finding and indoor positioning applications.

In AoA-based implementations, stationary beacons equipped with multi-antenna arrays determine the angle of arrival of signals emitted by a tracking device to pinpoint the tracker’s location with sub-meter level accuracy. When AoD is used, the tracking device triangulates its position by calculating the angle of departure of signals from the stationary Bluetooth beacons’ multi-antenna arrays.

Mesh, long range, and extended temperature range

The u‑blox NINA-B4 enables wireless mesh networks, which offer robust communication between large numbers of connected devices, extending the reach of messages by relaying them from node to node until they reach their destination. By simplifying the control of groups of devices, mesh networks are well suited for applications such as smart lighting systems in cities and buildings, which further benefit from the module’s enhanced operating temperature range (up to 105 °C).

Featuring Bluetooth long range, the NINA-B4 series is ideal for deployments in harsh environments, e.g. to enable wirelessly connected and configurable equipment. Long range not only increases the distance that Bluetooth signals can travel in undisturbed environments, it also makes communications more robust and reliable in unfavorable ones, common in production plants or on factory floors.

The NINA-B4 series comes with the u‑blox u‑connect software, simplifying the integration of Bluetooth into new and existing products by providing an easy-to-use interface to configure the connectivity required.

NINA-B4 further stands out for its powerful Arm® Cortex®-M4F MCU with an open CPU architecture, allowing customers to run their own applications right on the module. Supporting Zigbee and Thread, the first members of the NINA-B4 family come with an internal PCB antenna, or alternatively, with a U.FL connector for an external antenna of choice.

  • Bluetooth 5.1, Bluetooth mesh, Thread, and Zigbee
  • Direction finding support for indoor location
  • Extended temperature range up to 105 °C
  • Pin compatible with other NINA modules
  • Global certification


  • Pre-flashed with u-connect software for fastest time to market
  • Superior security functionality


  • Open CPU
  • Powerful MCU for customized applications
  • Arm® Cortex®-M4 with FPU, 512 kB flash and 128 kB RAM
  • Zigbee and Thread

NINA-B4 Variants

NINA-B4 series includes multiple variants to suit different applications

Product Software Antenna Certified antennas


10 x 15 x 2.2 mm
Customer applications through open CPU U.FL antenna connector 7 external antennas


10 x 15 x 2.2 mm
Customer applications through open CPU Internal antenna PCB (internal)


10 x 15 x 2.2 mm
u-connect software U.FL antenna connector 7 external antennas


10 x 15 x 2.2 mm
u-connect software Internal antenna PCB (internal)


NINA-B4 Characteristics

Adding Value to the End Product

u-connect software
  • Pre-flashed software
  • Common AT command interface across different modules
  • u-connectXpress - Zero programming solution
Small size
  • 10 × 15 mm with internal antenna or U.FL
  • Integrated radio, front-end, flash memory, and crystal
Pin compatible modules
  • NINA-B1 – Bluetooth low energy
  • NINA-B2 – Dual-mode Bluetooth
  • NINA-B3 – Bluetooth low energy
  • NINA-W10 – Open CPU Wi-Fi + dual-mode Bluetooth
  • NINA-W13 – Wi-Fi
  • NINA-W15 – Wi-Fi + dual-mode Bluetooth
Superior security
  • Secure Boot
  • Secure connections
  • Secure simple pairing
  • Structured product life cycle process
  • Module revision process
  • Documentation under strict revision control
  • ISO 9001 certified
  • Professional grade product qualification (ISO-16750)
  • Life time calculations (FIT/MTBF)
  • RMA process for field returns, including failure analysis
  • Controlled product changes (PCN)
  • Global regulatory certification
  • Bluetooth qualification and listing
  • Health and safety
  • Recertification to new or updated standards and mandates
  • Reliable production and logistics
  • Capacity to deliver in high volume
  • Zero defect policy
  • Fully automated testing, tuning, x-ray
  • Manufacturing sites ISO/TS 16949 automotive certified

NINA-B4 Specification Overview

Bluetooth version 5.1
Additional wireless standards NFC-A tag
802.15.4 (NINA-B40, only)
Nordic proprietary radio mode (NINA-B40, only)
MCU Cortex-M4 at 64 MHz, DSP, Floating point unit, RTC
Memory 512 MB Flash, 128 kB RAM
Max TX output power
RX Sensitivity
+8 dBm
-94 dBm (1 Mbit/s modulation)
-100 dBm (125 Kbit/s modulation)
Interfaces, u-connect software (NINA-B41) UART, GPIO (28)
Interfaces, HW support (NINA-B40) UART, USB, SPI, I2C, I2S, QDEC, PDM, PWM, ADC, GPIO (40)
Power supply VCC & VCC_VIO 1.7 to 3.6 VDC
Power consumption Active TX: 6.0 mA (0 dBm)
Active RX: 6.0 mA
Stand-by: 1.3 uA
Sleep: 600 nA (no clocks running, no RAM retension)
Operating temperature -40 °C to +105 °C
Dimensions 10.0 × 15.0 × 2.2 mm
Packaging Tape & Reel


NINA-B40 Block Diagram

u-blox — NINA-B40 Block Diagram

NINA-B4 Product Grades

u-blox — NINA-B4 Product Grades

EVK-NINA-B4 Evaluation Kit

For NINA-B4 stand-alone modules with Bluetooth 5.1 low energy long range, NFC, and Thread/Zigbee


  • Compatible with Arduino® Uno shields
  • Either u‑blox connectivity software or an open CPU with SDK
  • All the NINA‑B4 module pins are available at connectors
  • Can be powered through USB, external power supply, or coin cell battery
  • Has an onboard debugger hardware and firmware

The EVK‑NINA‑B4 evaluation kit serves as a complete starter kit that allows for easy prototyping using either u‑connect software or an open CPU device where the application is developed using the chipset supplier's SDK. The EVK‑NINA‑B4 can be used as a reference design for the NINA‑B4 series Bluetooth low energy modules thus enabling faster hardware development and shorter time to market. The evaluation board is equipped with Arduino sockets that enables use of numerous shields for quick prototyping of different use cases.

The EVK‑NINA‑B4 evaluation kit includes an evaluation board, an external antenna for Bluetooth (EVK‑NINA‑B400 and EVK‑NINA‑B410 only) as well as an NFC antenna.

EVK‑NINA‑B410 and EVK‑NINA‑B416 are pre-flashed with the u‑connectXpress software for easy configuration using AT commands from a host system.

u-blox — EVK-NINA-B4 Evaluation Kit

EVK-NINA-B4 Product Variants

EVK-NINA-B400 EVK for NINA-B400 with open CPU, stand-alone Bluetooth low energy, U.FL antenna connector and USB
EVK-NINA-B406 EVK for NINA-B406 with open CPU, stand-alone Bluetooth low energy, internal PCB antenna and USB
EVK-NINA-B410 EVK for NINA-B410 with u-connect software, stand-alone Bluetooth low energy, U.FL antenna connector and USB
EVK-NINA-B416 EVK for NINA-B416 with u-connect software, stand-alone Bluetooth low energy, internal PCB antenna and USB