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I used some firmware I found online to turn the UNO into an emulated HID device. The Arduino is no longer connected to a Serial COM port so I can't send serial data from my computer to the device. Is there a way that the Arduino can receive data from the computer in order to drive a function while in the HID emulated state?

  • yes, if the HID has an input channel – jsotola May 13 at 7:11
  • the 'some firmware' would have to support it – Juraj May 13 at 8:09
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You could use a second USB on the PC and use Hardware Serial to transmit commands. (Either via a second Arduino or a FTDI adapter)
But be aware that at least the firmware I use and the controller programs are very sensitive to being disturbed in the loop. So you should have a good understanding of timers, interupts and non blocking code.

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  • doesn't NicoHood support Serial and HID together? – Juraj May 13 at 17:41

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