Depending on your goals, there's the GPD Micro PC [1]. Quite the odd duckling, but it includes an RJ-45 and an honest-to-god DB9 for RS232! Not nearly as fun as

Depending on your goals, there's the GPD Micro PC [1]. Quite the odd duckling, but it includes an RJ-45 and an honest-to-god DB9 for RS232! Not nearly as fun as building it yourself though! [1] https://liliputing.com/2019/02/gpd-micropc-handheld-computer-preview.html https://liliputing.com/2019/02/gpd-micropc-handheld-computer...