Make sure that the development board is correctly connected in the Mu editor, refer to [Configuring the environment (Mu editor)](config_mu-editor.md).
The following information usually appears in the CircuitPython REPL window. The appearance of the >>> symbol means that we can start to enter commands to interact with it.
]0;🐍Wi-Fi: off | Done | 8.0.0-beta.0-49-g14fc4a079\Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.
Press any key to enter the REPL. Use CTRL-D to reload.
]0;🐍Wi-Fi: off | Done | 8.0.0-beta.0-49-g14fc4a079\]0;�Wi-Fi: off | REPL | 8.0.0-beta.0-49-g14fc4a079\
Adafruit CircuitPython 8.0.0-beta.0-49-g14fc4a079 on 2022-09-20; BPI-PicoW-S3 with ESP32S3
>>>Start typing the command on the right side of the >>> symbol, for example: print("Hello World!").
> Note that using the English input method, Chinese characters cannot be recognized by the REPL.
>>> print("Hello World!")
Hello World!
>>>Copy ctrl + shift + c.
Paste ctrl + shift + v.
Use the left mouse button to drag and select the command to be copied in the REPL, press the copy shortcut key on the keyboard, and then press the paste shortcut key to copy and paste the command.
Soft reset ctrl + d.
Interrupt ctrl + c, interrupt the currently executing program, but will not restart and reset.
Entering help("modules") in the REPL will list all modules in the current CircuitPython development board.
After importing the module, you can use the help() function to view the function names or variable names available inside the module. For example, if you view the board module, you can see all the available pins and peripheral functions of the development board.
>>> import board
>>> help(board)
object <module 'board'> is of type module
__name__ -- board
board_id -- bpi_picow_s3
GP0 -- board.GP0
GP1 -- board.GP1
GP2 -- board.GP2
GP3 -- board.GP3
GP4 -- board.GP4
GP5 -- board.GP5
GP6 -- board.GP6
GP7 -- board.GP7
GP8 -- board.GP8
GP9 -- board.GP9
GP10 -- board.GP10
GP11 -- board.GP11
GP12 -- board.GP12
GP13 -- board.GP13
GP14 -- board.GP14
GP15 -- board.GP15
GP16 -- board.GP16
GP17 -- board.GP17
GP18 -- board.GP18
GP19 -- board.GP19
GP20 -- board.GP20
GP21 -- board.GP21
GP22 -- board.GP22
GP25 -- board.GP25
LED -- board.GP25
GP26 -- board.GP26
GP26_A0 -- board.GP26
A0 -- board.GP26
GP27 -- board.GP27
GP27_A1 -- board.GP27
A1 -- board.GP27
GP28 -- board.GP28
GP28_A2 -- board.GP28
A2 -- board.GP28
GP29 -- board.GP29
GP29_A3 -- board.GP29
A3 -- board.GP29
NEOPIXEL -- board.NEOPIXEL
TX -- board.GP0
RX -- board.GP1
BOOT0 -- board.BOOT0
UART -- <function>
>>>