Category Archives: wireless hacks

Hiding Data in Music Might be the Key to Ditching Coffee Shop WiFi Passwords

In a move guaranteed to send audiophiles recoiling back into their sonically pristine caves, two doctoral students at ETH Zurich have come up with an interesting way to embed information into music. What sounds crazy about this is that they’re hiding data firmly in the audible spectrum from 9.8 kHz …read more

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Posted in audible, data encoding, Frequency modulation, masking frequencies, modulation, music, ofdm, steganography, wireless hacks | Leave a comment

The Physics Behind Antennas

If you have done any sort of radio work you probably have a fair idea about what antennas do. It is pretty easy to have a cursory understanding of them, too. You probably know there’s something magic about antennas that are a quarter wave long or a half wave long …read more

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Posted in antenna, dipole, physics, wireless hacks | Leave a comment

New Part Day: The $15 ESP32 With Cellular

Cruise around AliExpress for long enough and you’ll find some interesting new hardware. The latest is the TTGO T-Call, an ESP32 breakout board that also has a cellular modem. Yes, it’s only a 2G modem, but that still works in a lot of places, and the whole thing is $15. …read more

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Posted in 2g, ESP32, Microcontrollers, SIM800, SIM800L, wireless hacks | Leave a comment

Smart Bike Helmet Is Wireless

If you ride a bike, you probably share the road with a lot of cars. Unfortunately, they don’t always share the road very well with you. [Mech Tools] took a helmet, a few Arduinos, and some wireless transceivers and made headgear that shows when you stop and also shows turn …read more

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Posted in Arduino Hacks, brake light, helmet, motorcycle, motorcycle helmet, turn signal, wireless, wireless hacks | Leave a comment

Storm Chasers Score Bullseye On Tornado With Instrument-Packed Rocket

Model rockets are a heck of a lot of fun, and not a few careers in science and engineering were jump-started by the thrilling woosh and rotten-egg stench of an Estes rocket launch. Adding simple instrumentation to the rocket doubles the fun by allowing telemetry to be sent back, or …read more

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Posted in IMU, LoRa, rocket, science, sensor, storm, telemetry, tornado, wireless hacks | Leave a comment

Your Table Is Ready, Courtesy Of HackRF

Have you ever found yourself in a crowded restaurant on a Saturday night, holding onto one of those little gadgets that blinks and vibrates when it’s your turn to be seated? Next time, bust out the HackRF and follow along with [Tony Tiger] as he shows how it can be …read more

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Posted in gnu radio, HackRF, inspectrum, pager, radio hacks, reverse engineering, Universal Radio Hacker, wireless hacks | Leave a comment

Solving The Final Part Of The iClicker Puzzle

The regular Hackaday reader might remember the iClicker from our previous coverage of the classroom quiz device, or perhaps you even had some first hand experience with it during your university days. A number of hackers have worked to reverse engineer the devices over the years, and on the whole, …read more

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Posted in classic hacks, classroom, disassembler, firmware, i>clicker, reverse engineering, wireless hacks | Leave a comment

Tracking Stolen Bikes with Narrowband IoT

For his entry into the 2019 Hackaday Prize, [Marin Vukosav] is working on an ambitious project to create a small GPS tracking device which utilizes Narrowband IoT (NB-IoT) for long range communications. Rather than using a GSM modem which would suck the batteries dry in short order, NB-IoT can theoretically …read more

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Posted in 2019 Hackaday Prize, bike, gps, narrowband, SIM7000, The Hackaday Prize, tracking device, wireless hacks | Leave a comment

Perfecting the Open Source RC Controller

Over the last few months we’ve seen an influx of homebrew RC controllers come our way, and we’re certainly not complaining. While the prices of commercial RC transmitters are at an all-time low, and many of them can even run an open source firmware, there’s still nothing quite like building …read more

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Posted in 2019 Hackaday Prize, dual screen, ESP32, FPV, MCP23017, rc controller, RC transmitter, The Hackaday Prize, wireless hacks | Leave a comment

Open Hardware E-Ink Display Just Needs an Idea

Its taken awhile, but thanks to devices like the Amazon Kindle, the cost of e-ink displays are finally at the point where mere mortals such as us can actually start using them in our projects. Now we’ve just got to figure out how to utilize them properly. Sure you can …read more

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Posted in bluetooth low energy, digital signage, e-ink, e-paper, hardware, nRF52840, wireless hacks | Leave a comment