Melodio Self Mate

February 12, 2024 by Navarre Bartz 25 Comments

While the proliferation of the smartphone has caused the personal music player (PMP) market to mostly evaporate, there are still those who prefer a standalone device for their music. The Melodio Self-Mate is one such spiritual successor to the iPod.

Music-only devices really benefit from the wheel interface pioneered by Apple, so we still see it in many of the new Open Source PMPs including this one and the Tangara. The Melodio uses the ubiquitous ESP32 for its brains coupled with a TI PCM5102A DAC and TI TPA6130A2 headphone amp for audio. A slider on the side of the device allows you to switch it between mass storage mode and programming mode for the ESP32.

Since this device packs a little more horsepower and connectivity than the original iPods, things like listening to Spotify are doable once assembled, instead of having to completely rebuild the device. Speaking of building, there are only renders on the GitHub, so we’re not sure if this project has made the jump IRL yet. With more people concerned about the distractions of smartphones, maybe this renaissance of open PMPs will lead to a new golden age of music on the go?

Miss the halcyon days of the iPod? They’re easier to hack now than ever, and if you really want to go old school, how about a podcast on a floppy?

How The First IPod Was Blown Wide Open

December 9, 2023 by Jenny List 21 Comments

If someone makes a device, someone else will want to break it open and run their own software on it. When the original manufacturer is Apple this is never made easy, and as [Daniel Stenberg] reminds us in the case of one of the earlier iPod models it required an unusual approach.

In short, an HTML file was found which triggered a reboot, meaning a buffer overrun had been found in the firmware. After much experimenting, the memory location was found which would flash the backlight, and from there a piece of ARM code could be injected which would dump the firmware very slowly bitwise by flashing the light. Enough code could be extracted to find the address of the USB serial port, allowing new code to be made which dumped the firmware via USB. We remember the earliest models using FireWire instead of USB, so perhaps we can zero in on the 3rd or 4th generation. From there enough could be deduced to run the Rockbox music player firmware. We remember seeing friends doing this back in the day, something which was for a while the height of open-source coolness.

Fast forward twenty years or so, and we’re still covering people chipping away at Apple’s defenses. We don’t know whether a first-generation iPod could run Doom, but we know Rockbox was capable of it on other players.

Reverse Engineering The Apple Lightning Connector

February 22, 2023 by Chris Lott 7 Comments

A frequent contributor to the hacker community, [stacksmashing] has prepared an excellent instructional video on reverse engineering Apple’s Lighting connector proprietary protocol. The video begins by showing how to gain physical access to the signals and hooking them up to a logic analyzer. He then notes that the handshaking uses only a single signal and proposes that Apple isn’t going to re-invent the wheel (perhaps a risky assumption). Using a ChatGPT search, obligatory these days, we learn that Dallas Semiconductor / Microchip 1-wire is probably the protocol employed.

Which embedded single-wire busses exist that encode bits with different lengths of low and high signals?

At the basic level, 1-wire and protocols like Texas Instruments SDQ operate in a similar manner. It turns out that [stacksmashing] already wrote a SDQ analyzer module for the Saleae logic analyzer. Aided by this tool, he digs deeper and learns more about the kinds of messages and their contents. For example, upon being plugged in, the host system queries the accessory’s serial number, manufacturer, model number, and product description. Finally, he introduces the CRC reverse engineering tool reveng to determine which CRC polynomial and algorithm the protocol uses to frame each packet.

Even if you have no interest in Lightning cables, this video is a great tutorial on the types of things you need to do in order to make sense of an unknown communications protocol. Gather what information you can, make some educated guesses, observe the signals, revise your guesses, and repeat. In part two, [stacksmashing] will show how to build a homemade iPhone JTAG cable.

We wrote in more detail about cracking the Lightning interface back in 2015. The Lightning interface may have been a good solution in its day, foreshadowing some of the features we now have in USB-C. But its proprietary and closed nature meant it wasn’t used outside of the Apple ecosystem. With the proliferation and capabilities of USB-C, not to mention various legislative edicts, Lightning’s days seem numbered. Is the industry finally settling on one interface? Let us know your thoughts in the comments below.

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ESP32 Adds Bluetooth To An IPod Nano

September 14, 2022 by Jonathan Bennett 4 Comments

The iPod Nano was one of Apple’s masterworks, but it’s really tied down by its dependence on wired headphones. At least, that’s what [Tucker Osman] must have thought, as he spent an unreasonable amount of time designing a Bluetooth mod for the 3rd gen Nano. And it’s a thing of beauty — temperamental, brutally difficult to build, and fragile in use, but still beautiful. And while some purists try to keep their signal analog, [Tucker]’s coup d’etat is to intercept the iPod’s audio signal before the DAC chip, keeping the entire signal path digital to the Bluetooth speaker. Oh, and he also managed to make the volume and track skip buttons work, back across the wireless void.

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Scroll Through ESPHome With IPod-style Click Wheel

September 8, 2022 by Tom Nardi 5 Comments

While you’d be hard pressed to find a Hackaday writer that feels any nostalgia for the DRM nonsense the iPod helped to introduce, we’ve got to admit that we miss that click wheel. Spinning your way through long lists was a breeze, and the tactile response made it easy to stop exactly where you wanted. These days, we’re stuck fumbling our way through touch screen interfaces that make simple tasks like seeking to a particular spot in a song or video all but impossible to do with any kind of accuracy.

If you too yearn to once again feel that subtle thumping under your thumb, then check out this project from [landonr]. Technically the handheld gadget is intended to be used as a wireless remote for a home automation system powered by ESPHome, but that’s only one possible application for this particular combination of off-the-shelf components.

If you must, there’s a version with buttons.

Building your own version of the handheld device is a simple as mounting a LILYGO ESP32 T-Display TTGO, an ANO Rotary Navigation Encoder from Adafruit, and a battery pack to a scrap of perfboard. We’d probably look into 3D printing a case to make it a bit less…pokey, but that’s up to you. The result actually bears quite a resemblance to Apple’s iconic media player, but without that pesky walled garden to hold you back.

As mentioned previously, [landonr] wrote the firmware with the intention of controlling a home automation system. So there’s a lot of stuff in there about turning on lights and such. But there are also functions for media playback that look very promising. Whatever software you end up running on it, one thing is for sure: running through the menus is going to feel like a dream.

We’ve covered several other home automation remotes over the years. This handsome wooden model kept things simple with just a few physical buttons, while this somewhat more whimsical approach repurposed Nintendo’s Zapper light gun.

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Silence Of The IPods: Reflecting On The Ever-Shifting Landscape Of Personal Media Consumption

May 16, 2022 by Maya Posch 71 Comments

On October 23rd of 2001, the first Apple iPod was launched. It wasn’t the first Personal Media Player (PMP), but as with many things Apple the iPod would go on to provide the benchmark for what a PMP should do, as well as what they should look like. While few today remember the PMP trailblazers like Diamond’s Rio devices, it’s hard to find anyone who doesn’t know what an ‘iPod’ is.

Even as Microsoft, Sony and others tried to steal the PMP crown, the iPod remained the irrefutable market leader, all the while gaining more and more features such as video playback and a touch display. Yet despite this success, in 2017 Apple discontinued its audio-only iPods (Nano and Shuffle), and as of May 10th, 2022, the Apple iPod Touch was discontinued. This marks the end of Apple’s foray into the PMP market, and makes one wonder whether the PMP market of the late 90s is gone, or maybe just has transformed into something else.

After all, with everyone and their pet hamster having a smartphone nowadays, what need is there for a portable device that can ‘only’ play back audio and perhaps video?

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Classic IPods Are Super Upgradeable In 2022

February 16, 2022 by Lewin Day 35 Comments

The classic iPod was the MP3 player to beat back in the day, loaded with storage and with its characteristic click-wheel interface. [Ellie] had an iPod Video laying around, one of the more capable models that came out near the end of the product’s run, and set out upgrading it for duty in the pandemic-wracked badlands of 2022.

The iPod in question was a 5.5th generation model, prized for being the last to feature the Wolfson DAC with its good audio quality. [Ellie] used the ever-helpful iFixit guide to learn how to disassemble the device safely. Careful hands and a spudger are key to avoid marring the pressed-together metal case.

Once opened, an iFlash Quad board was installed inside that lets the iPod use up to four micro SD cards for storage instead of the original hard disk drive. With two 512 GB cards installed, [Ellie] won’t be short of storage. A new battery was then subbed in, along with a fancy clear front casing for the aesthetic charm of it all.

After the hardware modifications were complete, the iPod needed to be restored with iTunes to start working again. She then installed the open source Rockbox firmware, which opens up the capabilities of the hardware immensely. Perhaps best of all, it can play DOOM! Alternatively, you can use the clickwheel to control the volume on your MacBook if you so desire.

[Ellie’s] project goes to show that modifying an iPod these days can be a fun weekend build thanks to the great software and hardware now available. It’s wonderful to see that the platform still has such great support years after it has been discontinued. If you really want to look back though, take a gander at the early prototype of Apple’s breakout MP3 player.