LOG_ENTRY: entry_001 2024.11.12

spectral analysis of connected objects

"A deep dive into RF noise patterns in consumer IoT meshes."

#RF #IoT #Security
READ_TIME: 08:12

RESEARCH_LOG // RF_SPECTRUM

Analyzing the 2.4GHz band reveals a chaotic landscape of overlapping transmissions. In this entry, I document the methodology used to capture and decode Zigbee and BLE advertising packets using software-defined radio (SDR).

Methodology

A HackRF One was deployed in a standard residential environment, logging the spectrum over a 48-hour period.

  1. Capture: 20MHz bandwidth centered at 2.44GHz
  2. Demodulation: GNU Radio pipeline for signal isolation
  3. Analysis: Custom Python scripts to identify protocol signatures

Findings

The noise floor was significantly elevated by poorly designed IoT devices transmitting redundant state updates. This highlights the necessity for stricter power and transmission duty cycle regulations in consumer hardware.

<- return_to_directory