Category Archives: wireless hacks

ESP32 Turned Open Source COVID-19 Contact Tracer

Over the past few months we’ve heard a lot about contact tracers which are designed to inform users if they’ve potentially come into close proximity with someone who has the virus. Generally these systems have been based on smartphone applications, but there are also hardware solutions that can operate independently …read more

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Posted in bluetooth, bluetooth low energy, contact tracing, COVID, Covid-19, ESP32, Microcontrollers, web bluetooth, wireless hacks | Leave a comment

ESP8266 Makes a Wireless Card Reader

You can find commercial USB sticks that can also connect via WiFi. But [Neutrino] made his own using an ESP8266 married to a card reader. It all starts with the old trick of soldering a header to an SD card adapter. The USB port is still there, but it is …read more

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Posted in esp12e, ESP8266, sdcard, wireless, wireless hacks | Leave a comment

OTA ESP32 GUI Makes Updates Simple

One of the disadvantages of having cheap WiFi-capable boards like those based on the ESP32 is that you have to update them. If you have even a few in every room of your house, it can be a pain to pull them out and connect them to a cable for …read more

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Posted in ESP32, OTA, over-the-air update, processing, python, wireless hacks | Leave a comment

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

Hands On With a Batteryless E-Paper Display

E-paper displays are unusual in that power is only needed during a screen update. Once the display’s contents have been set, no power whatsoever is required to maintain the image. That’s pretty nifty. By making the display driver board communicate wirelessly over near-field communication (NFC) — which also provides a …read more

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Posted in barcode, dithering, e-ink, e-paper, Hackaday Columns, name badge, New Part Day, NFC, parts, qr code, waveshare, wireless, wireless hacks | Leave a comment

Bluetooth Development Board Goes the Distance

Have you ever come across an interesting chip or component that you wanted to experiment with, only to find that there doesn’t seem to be a development board for it? Spinning up your own board is a lot easier today than it has been in the past, but it’s still …read more

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Posted in bluetooth, development board, long range, mesh networking, nRF52832, parts, 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

Three-Dollar Router Rebooter Has One Job

Sometimes connectivity problems go away by power cycling a router. It’s a simple but inconvenient solution to a problem that shouldn’t exist, but that didn’t stop [Mike Diamond] from automating it for a few bucks in parts. The three-dollar router rebooter may be a simple device with only one job, …read more

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Posted in diy, ESP8266, home hacks, power cycle, reboot, state machine, wireless hacks | Leave a comment