They’re all a similar configuration of a relatively large amount of memory (compared to the usual embedded computer), a WiFi chip, and an ARM processor running a tiny Linux install. The card ...

In particular, ESP-Hosted-NG his turns your SPI- or SDIO-connected ESP32 (including -S2/S3/C2/C3/C6 into a WiFi card, quite speedy and natively supported by the Linux network stack, as opposed to ...

I have seen electronic business cards before, with various fun features including emulating USB flash drives, blinkenlights, or even wireless transceivers. I have never seen one running Linux ...