BeagleBadge and Zepto: Doom, Linux, and $1 I/O

BeagleBadge and Zepto made for two of the more interesting embedded demos in this Elektor TV interview: an AM62L-based badge that can idle for weeks, wake up to run Linux, and, yes, put Doom on an e-ink display. That sounds like a gimmick until you look at the real point of the platform: approachable embedded Linux, low-power design, and expansion without dragging half a lab onto the bench.

BeagleBadge and Zepto in Action

In my chat with Texas Instruments’s Andrei Aldea, the BeagleBoard-built badge was positioned as a friendly starting point for developers who want to learn Arm and embedded Linux without starting from a bare module.

he platform combines dual-core A53 processing, CC33-based Wi-Fi 6 and BLE 5.4, LoRa support, Qwiic expansion, GPS add-ons over UART, and compatibility with mikroBUS Click boards. If you want a refresher on embedded Linux fundamentals, this is exactly the kind of board that makes the theory tangible, and the wireless side lines up with TI's CC3301 companion IC family.

Why the Doom Demo Works

The headline-grabber is obvious: Doom running on e-ink. But the more interesting part is what the demo says about the hardware. Aldea showed a platform that can sip power in sleep mode for 30-plus days, use a replaceable Nokia BL-5C-style battery, boot from onboard SPI flash or microSD, and even drive an external DSI display at up to 1080p and 60 Hz.

In other words, this is not just a novelty badge. It is a compact HMI and prototyping platform that can move from quirky desk toy to something more serious, such as a thermostat, EV charging interface, or medical UI concept, without changing the basic development story.

From Badge to $1 Expansion

The BeagleBadge and Zepto start to get really interesting when you look at the ecosystem idea rather than the badge in isolation. Aldea also showed MSPM0-based Zepto boards that cost about $1 each and connect over Qwiic/I²C. The trick is that these tiny boards can extend interfaces such as UART and SPI from attached hardware and make them appear in Linux, which is a neat way to lower the cost of experimentation. That matters for hobbyists, classrooms, and small teams alike: instead of buying one expensive all-in-one board for every little variation, you can build outward in cheap increments. BeagleBadge and Zepto, taken together, are really a pitch for lowering the barrier to entry to embedded Linux and connected hardware development. Also, yes, Doom on e-ink is still funny.