The RFHunter Packs an Espressif ESP32 and Analog AD8317 to Monitor Down Hidden Spy Gear



Safety engineer Matthew Rogers has an Espressif ESP32-powered machine designed to smell out hidden wi-fi cameras, bugs, and different gadgets: the RFHunter.

“This challenge is an RF [Radio-Frequency] sign scanner constructed utilizing an [Espressif] ESP32, [Analog Devices] AD8317 RF detector, and varied different parts,” Rogers explains of his creation. “It is designed to detect and measure RF indicators within the surroundings and show the sign energy on an OLED show. It is helpful to search out hidden cameras, wiretapping gadgets, and different RF-enabled gadgets.”

Whereas Rogers has solely now launched the RFHunter to the general public, the challenge is already in its fourth iteration — having moved to a 3D-printed handheld housing designed to be assembled by hand with no instruments obligatory. The Espressif ESP32 handles the consumer interface and interprets the enter from the Analog Units AD8317, a demodulating logarithmic amplifier that converts an incoming radio sign right into a decibel-scaled output.

The output of the AD8317 is processed by the ESP32 and used to show a sign energy on the OLED show, which updates in actual time — permitting the consumer to wander round a room and hone in on the exact location of the radio sign’s supply, aided by a piezoelectric buzzer for audible suggestions. An inside battery, related to a lift converter which can be engineered away in a future revision, offers sufficient energy for “weeks or months [of use] relying on utilization cycles,” Rogers says.

Supply code and 3D print recordsdata can be found on GitHub underneath the reciprocal GNU Common Public License 3. Extra info on the challenge is obtainable on Rogers’ weblog.

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