Inside the RF Chamber — Episode 1: How Much Signal Do Building Materials Actually Block?
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.
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UART Console vs RTT Logging: A Bluetooth LE Power Comparison
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.
Four Bluetooth LE Advertising Decisions, Priced in Joules
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.
Why Battery Percentage Can't Predict a Bluetooth LE Brown-Out
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.