I had rshell working for a while, but now it is failing. I filed https://github.com/dhylands/rshell/issues/138, but I wonder if it is because of the fancy UISHELL ascii logo?
This is on the Atom Mini, so it's a bit tough to figure out!
I'm running v1.6.2-lite on it, and REPL says:
MicroPython 400ff3bbf-dirty on 2020-08-06; M5Stack with ESP32