New WiFi Satellite #35c3

Monitoring and logging traffic of all 14 2.4GHz WiFi channels!
Now even better :D

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Inspired by the WiFi Cactus by @darkmatter, seen at Defcon, we build this device to visualize all 2.4GHz WiFi traffic. Thanks to the ESP32 it is affordable, lower power and easy to build.

The upgraded version of the WiFi Satellite features new software and new hardware!
If you haven't seen the first version, view it here!

Hardware changes

We're now using the updated Packet Monitor V3 board by Travis Lin.
The new version adds a Neopixel (WS2812B) RGB LED and a 3 way slide switch on the side.

You can check out Travis Boards at Tindie! Just be aware that designs change and the latest Packet Monitor board might look a bit different than the ones we use right now.

Software changes

Thanks to the powerful ESP32 and the added slide switch on the board, I (Spacehuhn) wrote a firmware that features a new user friendly menu with way more information about the captured traffic than before!
All boards can also be controlled using simple commands over the serial connection. This solves one of the biggest problems we faced last year with our first build. Now we can sync the time with all boards! So no more .pcap files from 1970 :D
It also makes debugging way easier and we can controll all boards at the same time without hassle.

(3D) Build changes

The 3d printed parts are now plugged together with "LEGO Cross Axle 3m" for easier building and debugging.

Standard Tesselated Geometry - 27.91 kB - 01/10/2019 at 21:46


Standard Tesselated Geometry - 152.33 kB - 01/10/2019 at 21:46


Standard Tesselated Geometry - 152.72 kB - 01/10/2019 at 21:46


  • WiFi Satellite Mini

    Stefan Kremser12/20/2018 at 08:45 0 comments

    Since we're building a new WiFi Satellite, that left our build from last year lonley in a drawer...

    I was not able to rebuild the old satellite due to USB connection issues with most of the modules. I repaired a couple of them by soldering on new USB connectors.
    Of course the other modules can also be repaired but it takes patience, time and a steady soldering hand!

    So my idea was to make a mini WiFi Satellite to recycle some of the old modules and test the software before we build the big new WiFi Satellite on the congress itself.

    Here's the result:

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