https://devzone.nordicsemi.com/f/nordic-q-a/52189/how-can-i-send-uart-messages-from-more-than-one-peripheral-to-multi-link-central-simultaneouslyHi Devzone! I merged app_multilink_central and app_uart_c on central side and used app_uart on peripheral side. I&#39;m using 2 peripherals and 1 central now, and those can be connected successfully. But, when I send uart message from peripherals, theen-USTelligent Community 13Sun, 22 Sep 2019 09:16:54 GMThttps://devzone.nordicsemi.com/thread/211065?ContentTypeID=1Sun, 22 Sep 2019 09:16:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5eec2e9-490a-4e35-8592-f83f646454d3zester926<p>Hi Kenneth!</p> <p></p> <p>I solved it! The problem was that the function(ble_nus_c_init, db_disc_handler) was not called and specified by the number of connected devices.</p> <p>Thank you so much for your care!<br /><br />Best regards,</p> <p>Phil</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/210220?ContentTypeID=1Tue, 17 Sep 2019 18:18:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6917825a-e384-4a2a-9799-7f6ebb8bf462Kenneth<p>[quote user=""][/quote]</p> <p>I&#39;m using 2 peripherals and 1 central now, and those can be connected successfully.</p> <p>But, when I send uart message from peripherals, the central can receive the message from only one peripheral.</p> <p></p> <p>This sounds very much like this example, have you looked at it:&nbsp;<br /><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/ble_sdk_app_rscs_relay.html">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/ble_sdk_app_rscs_relay.html</a>&nbsp;&nbsp;</p> [quote user=""]After I entered again at the terminal of first peripheral(to send message again), the central errors with NRF_BREAKPOINT_COND.[/quote] <p>Did you&nbsp;define&nbsp;DEBUG so you may find the exact file name, line number and error code?</p><div style="clear:both;"></div>