# 10,501 Radios in Seven Days: What a $69 Badge Heard at Summer Camp

DevFeed: [10,501 Radios in Seven Days: What a $69 Badge Heard at Summer Camp](<https://devfeed.tech/articles/10-501-radios-in-seven-days-what-a-69-badge-heard-at-summer-camp-27480.md>)

Original publisher: [Read original article](<https://jerrygamblin.com/2026/08/10/10501-radios-in-seven-days-what-a-69-badge-heard-at-summer-camp/>)

Author: jgamblin

Published: 2026-08-10T13:07:44Z

Content type: article

Language: en

Sources: [Jerry Gamblin](<https://devfeed.tech/sources/jerry-gamblin.md>)

Topics: [Bluetooth](<https://devfeed.tech/topics/bluetooth.md>), [MicroPython](<https://devfeed.tech/topics/micropython.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>), [Claude](<https://devfeed.tech/topics/claude.md>), [Networks](<https://devfeed.tech/topics/networks.md>)

Tags: [black-hat](<https://devfeed.tech/tags/black-hat.md>), [bluetooth](<https://devfeed.tech/tags/bluetooth.md>), [bsides](<https://devfeed.tech/tags/bsides.md>), [capture](<https://devfeed.tech/tags/capture.md>), [claude](<https://devfeed.tech/tags/claude.md>), [devices](<https://devfeed.tech/tags/devices.md>), [hardware](<https://devfeed.tech/tags/hardware.md>), [micropython](<https://devfeed.tech/tags/micropython.md>), [networks](<https://devfeed.tech/tags/networks.md>), [open](<https://devfeed.tech/tags/open.md>), [uncategorized](<https://devfeed.tech/tags/uncategorized.md>)

## AI overview

A seven-day passive listening project using a Pimoroni Tufty 2350 examined WiFi and Bluetooth activity at BSides, Black Hat, and DEF CON. The article reports 4,653 access points and 5,848 Bluetooth devices, including 673 open networks and a beacon flooder that advertised 77 fake networks. It also explains why rotating addresses can inflate device counts and documents important limitations, including 2.4 GHz-only WiFi coverage.

## Source excerpt

Seven days of passive listening at BSides, Black Hat and DEF CON: 673 open networks, one beacon flooder, and what it takes to count devices honestly. I have wanted to build one of these for a long time. A little screen on my bag that tells me what the air around me is actually made ... Read more