https://devzone.nordicsemi.com/f/nordic-q-a/64855/expanding-dfu-trigger-library-with-custom-opcodeHello, We are in the final stages of our product development and we would like to add a feature used during assembly to give some sort of confirmation that everything is working OK on the board. Via USB we would like to report a single number valueen-USTelligent Community 13Fri, 14 Aug 2020 11:48:07 GMThttps://devzone.nordicsemi.com/thread/264704?ContentTypeID=1Fri, 14 Aug 2020 11:48:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:37a5a0cc-8731-4f37-8ee5-330e6bac1918Sigurd<p>Hi,</p> <p>I took a brief look at this, I have not tested it, but I believe you would start by expanding app_usbd_nrf_dfu_trigger_req_t in app_usbd_nrf_dfu_trigger_types.h with the new opcode, e.g. APP_USBD_NRF_DFU_TRIGGER_REQ_STATUS_REPORT<br />Then in app_usbd_nrf_dfu_trigger_inst_t in app_usbd_nrf_dfu_trigger_internal.h, add a pointer, similar to p_sem_ver, for the status report.<br />The in setup_req_class_in, you would need to add APP_USBD_NRF_DFU_TRIGGER_REQ_STATUS_REPORT in the switch case, and respond with app_usbd_core_setup_rsp() with the status report.</p> <p>As you mentioned, there might be alternative approaches as well, depending on your assembly line and the product itself, e.g. indicate that everything is OK with a LED on the product.</p><div style="clear:both;"></div>