The ESP8266 is a low-cost, compact Wi-Fi microcontroller module developed by Espressif Systems, widely used in research prototypes for wireless sensing and occupancy detection due to its integrated 802.11 b/g/n transceiver and programmable GPIO capabilities. In CSI and packet-capture based sensing research, it serves as an accessible hardware platform for collecting Wi-Fi signals, including probe requests and channel state information, enabling affordable deployment of sensing nodes without requiring expensive commercial hardware. Its popularity in the field stems from its low power consumption, small form factor, and strong community support, with closely related variants such as the ESP32 offering enhanced capabilities including Bluetooth and BLE support, making both modules common choices for multi-modal wireless sensing experiments.
Source Papers
- A Tutorial on Privacy, RCM and Its Implications in WLAN ↗ — A Tutorial on Privacy, RCM and Its Implications in WLAN
- Accurate occupancy estimation with WiFi and bluetooth/BLE packet capture ↗ — Accurate occupancy estimation with WiFi and bluetooth/BLE pa
- Channel State Information (CSI) Amplitude Coloring Scheme for Enhancing Accuracy of an Indoor Occupancy Detection System Using Wi-Fi Sensing ↗ — Channel State Information (CSI) Amplitude Coloring Scheme fo