While I couldn't find an explicit declaration of this in the linked article, the tunnel system likely has something on the level of an SBC (think raspberry pi) rather than a microcontroller.
I'm the author of that article. It runs on a SOM which is quite downspec from RPi (single core, arm32, 128Mb RAM) but yes it's a full featured system rather than a microcontroller.
Comments
While I couldn't find an explicit declaration of this in the linked article, the tunnel system likely has something on the level of an SBC (think raspberry pi) rather than a microcontroller.
I'm the author of that article. It runs on a SOM which is quite downspec from RPi (single core, arm32, 128Mb RAM) but yes it's a full featured system rather than a microcontroller.