A DIY parallel 2.4 GHz/5.8GHz WiFi capture array built from spare ESP32 boards.

Lock one ESP32 per channel, stream every node over USB, merge the streams live into one Wireshark timeline.

A single WiFi radio can only sit on one channel at a time. To watch the whole 2.4 GHz band it has to hop, and while it is parked on channel 6 it is deaf to everything on 1 and 11. You miss frames.

The fix is one radio per channel, all listening at once. Evil-Sentinel does this with the ESP32 boards you already have in a drawer: each board locks to a single channel, never hops, and streams its captured frames as pcap over its native USB-CDC.

One host process merges every stream into a single timeline and hands it to Wireshark.…