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esp32-hacking/PROJECT.md
user 2d52ac6026 chore: Downgrade ESP-IDF from v6.1.0 to v5.5.2 
Matches the version deployed on ESP32 sensors. Removes v6.1
workaround, updates all docs to reflect v5.5.2, regenerates
sdkconfig for the correct IDF version.
2026-02-04 15:02:54 +01:00

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ESP32 Hacking Project

Overview

Firmware customization and experimentation for ESP32 CSI (Channel State Information) sensors used in the wifi-sensing project.

Goals

  • Document current firmware and configuration
  • Add remote management commands (reboot, identify, status)
  • Implement OTA firmware updates
  • Explore BLE scanning for complementary presence detection
  • Optimize CSI data pipeline (adaptive rate, on-device processing)

Current State

  • 3x ESP32-DevKitC V1 deployed with stock csi_recv_router firmware
  • Firmware sends raw CSI data via UDP at ~100 pkt/s per device
  • No remote management capability (must physically access USB)

Hardware

Device Chip IP Address Location
muddy-storm ESP32-WROOM-32 192.168.129.29 Living Room
amber-maple ESP32-WROOM-32 192.168.129.30 Office
hollow-acorn ESP32-WROOM-32 192.168.129.31 Kitchen

Software Stack

Component Version Purpose
ESP-IDF v5.5.2 Development framework (~/esp/esp-idf/)
esp-csi latest CSI extraction library
FreeRTOS (bundled) RTOS kernel

Key Paths

Path Description
~/git/esp32-hacking/ This project (firmware sources, docs)
~/git/wifi-sensing/ Server application (receives CSI data)
~/esp/esp-idf/ ESP-IDF toolchain
~/esp/esp-csi/ Original esp-csi repo (build from here)

Dependencies

  • ESP-IDF toolchain (~/esp/esp-idf/)
  • USB cable for initial flash (OTA planned)

References

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