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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
Right now to manage it you'd have to build your own version of Espruino with the descriptor offering just HID and not CDC. The relevant bit of code is https://github.com/espruino/Espruino/blob/master/targetlibs/stm32usb/usbd_cdc_hid.c#L191C1-L321 and you'd have to cut the CDC bit out so it looked a bit more like https://github.com/STMicroelectronics/STM32CubeF7/blob/master/Middlewares/ST/STM32_USB_Device_Library/Class/HID/Src/usbd_hid.c#L135C37-L186
Building itself is not too hard - in fact as long as GitHub actions are enabled, when you fork the Espruino repo and make a change the firmware is built automatically! Or for local dev see https://github.com/espruino/Espruino/blob/master/README_Building.md