This looks great. I don't do serial/embedded stuff too often at the moment; ESPHome took away much of my need to hand-build stuff (happy and sad about that), but when I do I always find it slightly irritating to remember the syntax to connect with minicom or screen (I'm a Linux user).

I'm sorry I can't give more useful feedback at the moment, but this is certainly encouraging me to come up with an idea for an embedded project so I can try it!