JawnCon 0x1's Wi-Fi Modem Badge Connects Vintage Computing Vibes to a Security Conference

JawnCon is not just a security conference, it's a unique gathering that celebrates old and new technology. The 2024 theme sets the conference's backdrop with a nostalgic nod to retro computing in the late '80s and early '90s. As a tribute, the event organizers will present attendees with the JawnCon 0x1 Modem Badge, a Wi-Fi modem with function-accurate LEDs and a Hayes-inspired case design.

Arcadia University in Philadelphia hosts the two-day event. The first day is packed with talks and activities. The second day is primarily a ham radio class, with a test administered at the end of the day. As a true hacker conference, the 0x1 in the 2024 event's name signifies that this is the second year of this conference.

The JawnCon 0x1 modem badge has a straightforward PCB. It contains an ESP32 module, a level shifter, current-limiting resistors, and LEDs. Everything fits inside a custom-designed 3D-printed case that resembles the iconic Hayes Smartmodem 1200. (The 1200 is the baud rate for those who do not recognize its significance!)

The ESP32 provides Wi-Fi and runs an open-source firmware called RetroWiFiModem. This code supports the Hayes AT-style command set. These commands start with the letters "AT" followed by parameters and functions. For example, "ATDT 555-5555" would dial the phone number using touch tones. AT-style commands are still actively used in modern mobile models and Wi-Fi chips like the ESP32 (in some modes.) The code also provides LED indicators to mimic modem functions. Wi-Fi modems are popular devices for replicating the vintage bulletin boards (BBS) experience through telnet and Wi-Fi.

Event organizers anticipate 200 to 250 attendees. This range enabled them to 3D print the badge's two pieces on a single Prusa MK4 in less than two months! The labels for the LEDs used a pulsed infrared laser. Even if the designers used a slightly unsafe approach, it was an effective technique. Full details about the build are available on the JawnCon 0x1 Modem Badge page.

You can get the modem badge by attending JawnCon 0x1 on October 11th, 2024. Tickets are available through this Eventbrite link. General admission is $100, but students can attend for free. Visit jawncon.org for more information about the conference.