Although not technically the first virtual pet, the Tamagotchi handhelds certainly popularized the idea and made it a worldwide phenomenon. In the late 90s it was hard to go out …. Hacking the Modern Tamagotchi With UART.
In the late 90s it was hard to go out in public and not see them dangling from backpacks and belt loops. They turned out to be more than a passing fad, too. There have been Tamagotchis in various forms since then, and one of the latest, the Tamagotchi Paradise, is uniquely hackable thanks to this custom UART interface.
The build starts with a simple and inexpensive CH340G UART adapter with a built-in USB interface. A custom 3D printed enclosure is used to house the adapter and also help to expose the interface to the Tamagotchi. This is done by wiring three pins to nickel strips, which are threaded through slits in the case and looped back around to create a pogo-style adapter for the Tamagotchi’s custom dock.
Normally this would be used to link to other Tamagotchis, but in this case the USB-to-UART adapter mimics it, allowing for all kinds of in-game shenanigans.
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