I'd like to build out something similar with a mechanical keyboard, where I could write/program on the go, then connect up to a full size computer and upload my

I'd like to build out something similar with a mechanical keyboard, where I could write/program on the go, then connect up to a full size computer and upload my work over usb, bluetooth or ps2. You could manage keyboard layout/chording along with password key management, and rudimentary calculations. I imagine an esp32 would be more in line once wifi/bluetooth were required. Esp-lisp already has a rudimentary Emacs...so perhaps most of the heavy lifting has already been done.