← index #15340Issue #18098
Off-topic · high · value 1.118
QUERY · ISSUE

ESP32 Outputting Garbage in REPL

openby MATTYGILOopened 2024-06-24updated 2024-06-26
bug

Port, board and/or hardware

esp32s3

MicroPython version

Hi I was using micropython on my esp32s3 and then it started outputting garbage. I really don't want this to happen to the device whilst it is running in production. What do you think the cause of this error is. Also is there any best practices in stopping this if it happens or preventative measures. All help is much appreciated.
<img width="1404" alt="Screenshot 2024-06-24 at 09 08 04" src="https://github.com/micropython/micropython/assets/34808802/debcbd8b-f668-4460-adfa-5713f5bdae11">

MicroPython 66af921a3 on 2024-04-13; ESP32S3 module (spiram octal) with ESP32S3

Reproduction

I am not fully sure this happened out of the blue a few times and I am not sure how to recreate it

Expected behaviour

No response

Observed behaviour

<img width="1404" alt="Screenshot 2024-06-24 at 09 08 04" src="https://github.com/micropython/micropython/assets/34808802/c896dd65-3a69-488e-833b-a333b42350f0">

Additional Information

No, I've provided everything above.

Code of Conduct

Yes, I agree

CANDIDATE · ISSUE

USB HID device on ESP32 has a problem!

openby ThomasAtBBTFopened 2025-09-19updated 2025-09-19
bug

Port, board and/or hardware

ESP32S3

MicroPython version

I created an issue on USB-LIB but I think the problem must be solved here...
https://github.com/micropython/micropython-lib/issues/1044

Reproduction

The code for reproducing the problem has been tried on MicroPython 1.26.1 and also on the new 1.27 releases.

It is not ESP board related. I tried the examples on different boards with different MicroPython versions.

I can also share Wireshark logs if necessary, but the bug is easily reproducible with the unmodified USB HID device samples from the lib directory.

Expected behaviour

The samples should "just work" also for the ESP32S3 boards.

Observed behaviour

The LED out reports are arriving nicely in the code, but all keystrokes that are sent are arriving with all bytes "zero" at the host. (Confirmed by Wireshark )

Additional Information

See the debug code changes documented in the original lib-issue!

Code of Conduct

Yes, I agree

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