You set your advertising interval to 100 milliseconds. Your device is not advertising every 100 milliseconds, and it never was. Here is what the specification actually mandates, what it costs you in a power number, and the three things to do about it.
A phone tells you if your device works for users, not if a commit broke it. Scan, advertise and connect from a scriptable Bluetooth LE dongle instead.
An idle UART console holds the high-frequency clock on and keeps the chip from reaching deep sleep. On the bench it raised a beacon's average current 4.4 times, and RTT logging measured at the same floor as no logging at all.
Transmit power, payload, scannability and advertising interval, each measured per advertising event on an nRF54L15. Three change what an event costs. The fourth only changes how many you pay for.
The battery level your device reports is read at rest and tracks energy. It browns out under load, when the voltage sags. Here is why your battery percentage can't see the reset coming, shown on the bench, and how to design around it.
Nordic's nRF54L15 Tag is a dual-antenna, coin-cell Channel Sounding prototyping platform. A hands-on look at the board, why the second antenna matters, and ranging against it from a phone.
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.
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.
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.
Every Bluetooth LE product has to work through enclosures and building materials. We measured ABS plastic and aluminum at 2.4 GHz inside a professional RF shielded chamber, with ceramic tile in the full analysis.
How much signal do common materials actually block? We measured ABS plastic, ceramic tile, and aluminum inside a $4,000 RF shielded chamber with real Bluetooth LE hardware. Drywall and insulation are still to come.
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.
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