I've been obsessed with Docker lately. I've been using it for a lot of things. I've also been getting back into Raspberry Pis over the last year or so. I was talking with a fellow writer here at HTG about different things to do with a Pi 4 in my budget home lab, and we got toDocker containers. I wondered if I could get them to work on this older SBC. It turned out I had some success with the project. It unlocked quite a few cool new ideas.

I'm an ardent supporter of archiving things. The Internet Archive and Wayback Machine are two of my most frequented places online. As I was researching something earlier this year, I stumbled upon something I (surprisingly) hadn't heard of before: the WARC format. These things are one of the most fascinating files/formats I've come across since Ogg Vorbis. And I wanted to learn more about what they are and how to use them.

We’ve seen the GeekMagic SmallTV line of devices before — these cheap gadgets combine a microcontroller and a display in a little plastic case that can be used to show the time or weather. Powered by either an ESP8266 or an ESP32, the things could easily pass for a hobby build if it wasn’t for their professionally produced enclosures. In fact, we wouldn’t be surprised if GeekMagic lifted the idea from an existing DIY project.

As you might expect we’ve seen several hacks for these devices already, which usually involves replacing the stock firmware. But this latest approach is unique in that you don’t need to mess with the stock software, nor do you need to break out the soldering iron. By leveraging a built-in photo viewer function of the SmallTV [Yongha Kim] shows how you can get the gadget to display pretty much whatever you want.

The trick here is that the image is being generated by a machine on the network, say your desktop or server, and being pushed over to the SmallTV over HTTP. In this example the image is being generated in Python with the Pillow library, and [Yongha] has it showing Claude and Codex usage data, but you could really approach this however you wish.

All you need to do is create a 240×240 image and shoot it over to the device, so you’re free to come up with whatever sort of visuals you’d like. It even supports GIF if you’d like to work animation into it. The content can of course be whatever information you’re interested in showing, and it can be generated by whatever programming language or tool you’re most comfortable with. It’s a fascinating proof of concept, and now that the method has been demonstrated we’re interested to see where the community can take it.

If this all sounds a little too easy for your tastes, don’t worry. There’s a plenty deep rabbit hole you can dive into should you elect to replace the device’s firmware entirely.