Developer Builds ESP32 Wi-Fi Multi-Tool With Packet Sniffer and Deauth Radar

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A developer has detailed the third phase of converting an ESP32-S3 microcontroller into a portable network analysis multi-tool. The project adds a wireless web portal that allows DuckyScript payloads to be uploaded over Wi-Fi to onboard LittleFS flash storage, eliminating the need for a wired serial connection. A packet sniffer running in promiscuous mode captures raw 802.11 frames and saves them as .pcap files directly to memory. The build also includes a Deauth Radar that monitors for Wi-Fi deauthentication and disassociation frames in real time, triggering an on-screen LVGL warning and logging attack details to a file. Streaming file uploads in small chunks and using FreeRTOS queues were key architectural choices to avoid out-of-memory crashes on the RAM-limited device.

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