QUERY · ISSUE

Add USB Host

openby Vincent1-pythonopened 2025-07-13updated 2025-12-22

enhancement

Description

Add USB Host, after all, you can use it on esp32p4.

Code Size

None

Implementation

I hope the MicroPython maintainers or community will implement this feature

Code of Conduct

Yes, I agree

CANDIDATE · PULL REQUEST

esp32: Enable support for machine.USBDevice.

mergedby sebromeroopened 2024-12-04updated 2024-12-16

port-esp32

Summary

Recently support for machine.USBDevice was kindly added to the ESP32 port. However it's not currently enabled in the runtime yet by default.
After discussing it (#15564) I followed the recipe of @TomFahey and the suggestions of @andrewleech to enable the USB runtime support support the same way it's been added e.g. to the RP2 port.

Testing

I tested it on an Arduino Nano ESP32 board by emulating a HID keyboard. In fact I had a whole class of students testing it and it worked beautifully.

Trade-offs and Alternatives

I'm not sure how this affects the binary size but I would expect a minimal increase.

Assessment

Q Qwen · high

The QUERY item (#17667) requests USB HOST support (acting as a host to connect to other devices like keyboards/mice) for ESP32-P4. The CANDIDATE item (#16356) implements/enables USB DEVICE support (acting as a peripheral that other hosts can connect to) for the ESP32 port. These are opposite directions of USB functionality (Host vs Device). While both relate to USB on ESP32, they address fundamentally different capabilities and use different underlying mechanisms (USB Host stack vs TinyUSB Device stack). The PR does not resolve the feature request for USB Host support.

Suggested action

Keep both items open. The PR addresses USB Device functionality, while the issue requests USB Host functionality. Consider linking the issue to the PR for context, but do not close the issue as the requested feature remains unimplemented.