https://devzone.nordicsemi.com/f/nordic-q-a/72295/custom-hid-device-on-nrf52840I develop my own device on nRF52840 which will be HID device. And I have made my own HID descriptor of device: And if I send data with function from example: And nothing comes, because In report ID = 1, but this function sends data withen-USTelligent Community 13Wed, 03 Mar 2021 19:51:36 GMThttps://devzone.nordicsemi.com/thread/297623?ContentTypeID=1Wed, 03 Mar 2021 19:51:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:93bf0721-d695-42ed-b271-17fc55b134cbtanyashiro<p>Hi.&nbsp; In my report <span>REPORT_SIZE&nbsp;</span>and <span>REPORT_COUNT</span> were defined. But my mistake was that I sended to function&nbsp;size that was not match REPORT_SIZE. That is why nothing was sended. But in the same time function returns 0, i.e. there is no any mistake.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/297486?ContentTypeID=1Wed, 03 Mar 2021 12:19:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3bcff265-588e-4ef1-a75e-aecdf8136747Dmitry<p>Hi,</p> <p>if you include report ID to your HID descriptor, the first byte of report data should be report ID, the real data starts from the second byte.</p> <p>Your descriptor looks somewhat&nbsp;messy, and you didn&#39;t define REPORT_COUNT and REPORT_SIZE for your output report. I would suggest to try a working descriptor from example, then extend it with report ID and change as your app needs.</p><div style="clear:both;"></div>