u-blox ANNA-B5 Stand-Alone Bluetooth® LE Modules

u-blox ANNA-B5 Stand-Alone BLUETOOTH® LE Modules are ultra-compact, high-performance, stand-alone BLUETOOTH® LE wireless MCU modules designed for size-constrained applications. These modules are built on the Nordic Semiconductor nRF54L15 wireless SoC, combining strong processing, modern security, and multi-protocol support. The ANNA-B5 modules offer a choice between full open-CPU control and fast AT-command integration, making it easy to build future-ready, secure, and scalable IoT products. These modules feature an embedded Arm® Cortex®-M33 microcontroller, 1.524MB non-volatile memory, and 256kB RAM, and state-of-the-art power performance.

The ANNA‑B505 and ANNA‑B565 modules come with an internal antenna for ease of integration into the end product. The ANNA‑B501 and ANNA‑B561 modules include an antenna pin for use with an external antenna of choice. The ANNA-B56 modules come with u‑connectXpress software. This software supports BLUETOOTH® LE serial port service, GATT client and server, beacons, BLUETOOTH® channel sounding, long-range (LE-coded), and simultaneous peripheral and central roles. Typical applications include industrial automation, medical and healthcare, smart home and buildings, and telematics.

Features

  • Ultra-compact SiP 6.5mm x 6.5mm x 1.2mm dimensions
  • High-performance Arm® Cortex®-M33 for demanding applications
  • Qualified against BLUETOOTH® core 6.0, with channel sounding
  • Thread, Zigbee®, NFC™, and matter applications
  • Advanced protection against security threats
  • u‑connectXpress software for accelerated time to market
  • Global certification

Applications

  • Industrial automation
  • Medical and healthcare
  • Real-Time Locations (RTLS)
  • Indoor positioning
  • Asset tracking
  • Wireless-connected and configurable equipment
  • Advanced wearables
  • Low-power sensors
  • Point-of-sale
  • Smart home and buildings
  • Telematics

Block diagram

Block Diagram - u-blox ANNA-B5 Stand-Alone Bluetooth® LE Modules
Published: 2026-06-02 | Updated: 2026-06-07