Nordic's Axon NPU + Bluetooth LE: Building a Voice-Controlled Workout Tracker
A hands-on Voice Workout demo on the Nordic nRF54LM20 DK using the Axon NPU and Bluetooth LE. Nordic's bundled wakeword + KWS models do the work.
Latest
LogScope
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Why I Couldn't Use J-Link RTT Viewer (And Built My Own)
For ten years I wanted a better embedded log viewer, specifically for Bluetooth LE work. In March 2026 I finally built one, in about six hours, with help from an AI coding agent. Here is what didn't work, what changed, and what shipped.
Bluetooth LE Audio and Auracast: The Profile Stack Explained (BAP, PBP, CAP, TMAP, HAP, GMAP)
What Bluetooth LE Audio and Auracast actually are, how they relate, and what the six LE Audio profiles (BAP, PBP, CAP, TMAP, HAP, GMAP) each do.
How Much Signal Do Building Materials Block? Real Bluetooth LE Measurements
We tested ABS plastic, ceramic tile, drywall, insulation, and aluminum in a $4,000 RF chamber. How much does each block Bluetooth LE at 2.4 GHz?
Inside the RF Chamber — Episode 1: How Much Signal Do Building Materials Actually Block?
How much signal do common building materials actually block? We tested five materials inside a $4,000 RF shielded chamber with real Bluetooth LE measurements.
Meet the Nordic nRF54LS05: The Cost-Optimized Entry Point to the nRF54L Series
Nordic nRF54LS05A and LS05B: entry-level Bluetooth LE SoCs with 128 MHz Cortex-M33, 508 KB NVM, and ultra-low power for sensors, beacons, remotes.
Tutorial
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Integrate Hubble Network on your nRF54L15 for Global Connectivity
Learn how to connect your Bluetooth LE devices to Hubble Network's global IoT infrastructure—90M+ smartphone gateways—using Nordic's nRF54L15 and the reference app.
nRF Sniffer Guide - Part 3: Analyzing Bluetooth LE Connections
Capture and analyze Bluetooth LE connections with nRF Sniffer and Wireshark. Covers CONNECT_IND, Link Layer procedures, and ATT/GATT operations.
Inside the RF Chamber — Episode 0: The Complete Test Walkthrough
Hands-on first test of a Ramsey STE3000M RF shielded enclosure with a BleuIO Bluetooth LE dongle, with door open vs closed scan results.
Inside the RF Chamber — Episode 0: Can an RF Shielded Enclosure Really Block Bluetooth LE Signals?
I tested a Ramsey STE3000M RF shielded enclosure with a Bluetooth LE dongle. Door open vs. closed scan results show dramatic signal isolation.
Bluetooth Channel Sounding: Proximity Unlock Demo with Pixel Watch
Build a proximity Mac unlock with Bluetooth Channel Sounding, a Pixel Watch 4, Silicon Labs xG24, and Python. Video demo and source included.
BLE Sniffer Basics + Comparison Guide (Updated 2026)
A Bluetooth LE sniffer is one of the most crucial tools that every Bluetooth developer should have on hand.