Спасибо @dadigor, получил.
>about
ESP32 ROM Basic (c) 2016 Espressif Shanghai
Derived from TinyBasic Plus by Mike Field and Scott Lawrence
>
>mem
32543 bytes free.
>
>help
A very Basic ROM console. Available commands/functions:
LIST
NEW
RUN
NEXT
LET
IF
GOTO
GOSUB
RETURN
REM
FOR
INPUT
PRINT
PHEX...