Category Archives: wifi

Great Badge Concept: A “Geiger Counter” for WiFi Deauthentication Frames

[Nick Price] had a wonderful concept for a DEFCON badge: a device that worked a lot like a directional Geiger counter, but chirped at detecting WiFi deauthentication packets instead of radiation. That’s a wild idea and it somehow slipped past us last year. Why detect such a thing? Well, the …read more

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Posted in deauth attack, Deauthentication, defcon, geiger, geiger counter, telephreak, wifi, wireless hacks | Leave a comment

WiFi Goes Open

For most people, adding WiFi to a project means grabbing something like an ESP8266 or an ESP32. But if you are developing your own design on an FPGA, that means adding another package. If you are targeting Linux, the OpenWifi project has a good start at providing WiFi in Verilog. …read more

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Posted in fpga, linux hacks, openwifi, radio hacks, SoC, verilog, wifi, wireless hacks, xilinx | Leave a comment

Lowering the Boom on Yagi Element Isolation

Antenna design can be confusing, to say the least. There’s so much black magic that goes into antennas that newbies often look at designs and are left wondering exactly how the thing could ever work. Slight changes in length or the angle between two elements result in a vastly different …read more

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Posted in 2.4 ghz, antnenna, boom, directional, driven, isolated, parasitic, wifi, wireless hacks, yagi, yagi-uda | Leave a comment

Turn an Unused Pi Zero into a Parts Bin WiFi Extender

We know a lot of you are sitting on an unused Raspberry Pi Zero W, maybe even several of them. The things are just too small and cheap not to buy in bulk when the opportunity presents itself. Unfortunately, the Zero isn’t exactly a powerhouse, and it can sometimes be …read more

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Posted in extender, pi zero, Pi Zero W, Raspberry Pi, repeater, wifi, wireless hacks | Leave a comment

21st Century Cheating: WiFi In A Calculator

Obviously, we would never endorse cheating on an exam, but sometimes a device is just too tempting to be left untouched. For [Neutrino], it was an old Casio calculator that happened to have a perfectly sized solar panel to fit a 128×32 OLED as replacement. But since the display won’t …read more

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Posted in arduino, Arduino Hacks, calculator, casio, CHEATING, ESP8266, firebase, wifi | Leave a comment

21st Century Cheating: WiFi In A Calculator

Obviously, we would never endorse cheating on an exam, but sometimes a device is just too tempting to be left untouched. For [Neutrino], it was an old Casio calculator that happened to have a perfectly sized solar panel to fit a 128×32 OLED as replacement. But since the display won’t …read more

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Posted in arduino, Arduino Hacks, calculator, casio, CHEATING, ESP8266, firebase, wifi | Leave a comment

The Rusty Nail Award for Worst WiFi Antenna

In general, you get what you pay for, and if what you pay for is a dollar-store WiFi antenna that claims to provide 12 dBi of signal gain, you shouldn’t be surprised when a rusty nail performs better than it.

The panel antenna that caught [Andrew McNeil]’s eye in a …read more

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Posted in antenna, dipole, gain, Network analyzer, rusty nail, teardown, wifi, wireless hacks | Leave a comment

If coffee == true {

Having a shared coffee maker in the workplace is both a blessing and a curse. It’s nice to have constant access to coffee, but it can be frustrating to find the coffee pot emptied right as you walk in to the break room. To solve this problem in their office, …read more

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Posted in amazon web services, AWS, coffee, ESP8266, internet hacks, NodeMCU, office, simple notification system, slack, sns, wifi | Leave a comment

Raspberry Pi 4 HDMI is Jamming Its Own WiFi

Making upgrades to a popular product line might sound like a good idea, but adding bigger/better/faster parts to an existing product can cause unforeseen problems. For example, dropping a more powerful engine in an existing car platform might seem to work at first until people start reporting that the increased …read more

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Posted in hdmi, interference, news, radio frequency, Raspberry Pi, resolution, RF, wifi | Leave a comment

Ask Hackaday: Does Your Car Need an Internet Killswitch?

Back in the good old days of carburetors and distributors, the game was all about busting door locks and hotwiring the ignition to boost a car. Technology rose up to combat this, you may remember the immobilizer systems that added a chip to the ignition key without which the vehicle …read more

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Posted in Ask Hackaday, automobiles, bluetooth, car hacks, cars, interent, Interest, killswitch, Original Art, trucks, Vehicles, wifi | Leave a comment