The Broadcom BCM43455 is a widely used Wi-Fi chipset found in consumer devices such as the Raspberry Pi 3B+ and 4, supporting 802.11a/b/g/n/ac standards across 2.4 GHz and 5 GHz bands. It is particularly significant in the CSI sensing research community because it is compatible with the Nexmon CSI Extractor Tool, an open-source firmware-patching framework that enables per-frame CSI extraction without requiring specialized or costly hardware. This accessibility has made the BCM43455 a popular platform for low-cost, reproducible sensing experiments, including applications such as crowd counting, localization, and activity recognition, with the chipset appearing in both standalone and embedded deployment scenarios across diverse indoor environments.
Source Papers
- Free Your CSI ↗ — Free Your CSI
- Guiding Wi-Fi Sensor Placement for Enhanced CSI-Based Sensing in Stationary Crowd Counting ↗ — Guiding Wi-Fi Sensor Placement for Enhanced CSI-Based Sensin
- Investigation of Environment Dependence in Wi-Fi CSI-Based Crowd Counting Systems ↗ — Investigation of Environment Dependence in Wi-Fi CSI-Based C