https://devzone.nordicsemi.com/f/nordic-q-a/42923/nrf52480-dongle-as-a-central-device-and-debugging-and-programming-issues-using-segger-j-linkHello, I am trying to program my nrf52840 dongle to act as a BLE central device and I am using the USB CDC ACM Module. I am facing the following issues: 1- I was able to program it to serve one peripheral, but I am not able to do it for several peripheralsen-USTelligent Community 13Thu, 24 Jan 2019 09:04:05 GMThttps://devzone.nordicsemi.com/thread/167563?ContentTypeID=1Thu, 24 Jan 2019 09:04:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:010449b0-70a2-4d7b-866e-aa75277c2cbbAndreasF<p>Hi.</p> [quote user=""]1- I was able to program it to serve one peripheral, but I am not able to do it for several peripherals.[/quote] <p>&nbsp;What did you try to program? Could you explain some more?</p> [quote user=""]2- I cannot program or debug my dongle using the segger j-link tool, as the dongle keeps flashing red after everything seems to be successful.[/quote] <p>&nbsp;The nRF52840 Dongle does unfortunately not have a Segger chip on it, so it is impossible to debug without an external debugger.</p> <p>Have you looked at the <a href="https://devzone.nordicsemi.com/tutorials/b/getting-started/posts/nrf52840-dongle-programming-tutorial">nRF52840 Dongle Programming Tutorial</a>? It is a great place to start with Dongle programming!</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>