QUERY · ISSUE

ESP32, Mac Os, Enter raw repl failes

openby fanselauopened 2021-11-17updated 2021-11-29

port-esp32

Hi there,

I was using the micropython 1.17 firmware on an ESP32 and was trying to load a file into memory with the pyboard.py tool. I was doing the same thing on a Linux machine (where the serial port was /dev/tty.USB0) but for some reason the same fails on Mac OS (serial port /dev/tty.usbserial-0001) with the following error:
b'\x9a\x82\xc2\x82\xa2\x82\x82bb\x95\xb9\xe94292\r\nentry 0x400806b0\r\nMicroPython v1.17 on 2021-09-02; ESP32 module with ESP32\r\nType "help()" for more information.\r\n>>> ' Traceback (most recent call last): File "/Users/luca/mambaforge/bin/mpremote", line 8, in <module> sys.exit(main()) File "/Users/luca/mambaforge/lib/python3.9/site-packages/mpremote/main.py", line 414, in main pyb.enter_raw_repl() File "/Users/luca/mambaforge/lib/python3.9/site-packages/mpremote/pyboard.py", line 340, in enter_raw_repl raise PyboardError("could not enter raw repl") mpremote.pyboard.PyboardError: could not enter raw repl

Looking at the pyboard file, it suggest that the activation of the "raw repl" mode is unsuccessful, which is weird since i can use "mpremote connect /dev/tty.usbserial-0001" to get into the normal repl and the use Ctrl-B to access the raw repl mode.

On further investigation it seems like the write does not actually reach or gets interpreted by the microcontroller.

Thanks in advance for any recommendation or resources that might be useful to fix this issue

CANDIDATE · ISSUE

mpremote: unable to execute fs commands - mpremote.transport.TransportError: could not enter raw repl

openby maxpopened 2024-11-03updated 2025-10-27

bugtools

Port, board and/or hardware

esp32 wroom

MicroPython version

MicroPython v1.23.0 on 2024-06-02; Generic ESP32 module with ESP32
mpremote 1.24.0

Reproduction

mpremote fs ls failed with
mpremote.transport.TransportError: could not enter raw repl

Expected behaviour

expected

mpremote fs ls
ls :
           0 mrequests/

Observed behaviour

b'MicroPython v1.23.0 on 2024-06-02; Generic ESP32 module with ESP32\r\nType "help()" for more information.\r\n>>> '
Traceback (most recent call last):
  File "/opt/homebrew/bin/mpremote", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/opt/homebrew/lib/python3.11/site-packages/mpremote/main.py", line 538, in main
    handler_func(state, args)
  File "/opt/homebrew/lib/python3.11/site-packages/mpremote/commands.py", line 294, in do_filesystem
    state.ensure_raw_repl()
  File "/opt/homebrew/lib/python3.11/site-packages/mpremote/main.py", line 480, in ensure_raw_repl
    self.transport.enter_raw_repl(soft_reset=soft_reset)
  File "/opt/homebrew/lib/python3.11/site-packages/mpremote/transport_serial.py", line 139, in enter_raw_repl
    raise TransportError("could not enter raw repl")
mpremote.transport.TransportError: could not enter raw repl

Additional Information

My temporary workaround is additional time.sleep(1) at line
https://github.com/micropython/micropython/blob/0e490b7c8f32bb72c516985abe67147b9385dc34/tools/mpremote/mpremote/transport_serial.py#L125
before flush input.

Code of Conduct

Yes, I agree