Firmware blocked until RTT connectshttps://devzone.nordicsemi.com/f/nordic-q-a/124175/firmware-blocked-until-rtt-connectsMy firmware is blocked on custom board until RTT connects: Code hits and blocks on a printf. This doesnt happen when using an NRF5340, but does with NRF5280. Just trying to figure out if this is expected and if there is a work around to have RTT enableden-USTelligent Community 13Fri, 12 Sep 2025 22:42:05 GMTRE: Firmware blocked until RTT connectshttps://devzone.nordicsemi.com/thread/548641?ContentTypeID=1Fri, 12 Sep 2025 22:42:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:abd4df50-8532-4e74-a962-c209dba2cd5bscottc19<p>Issue turned out to be:</p> <div> <div><span>#no crystal</span></div> <div><span>CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC</span><span>=y<br /></span><br />adding this line resolved the problem, not sure why the default is to have the system want a 32k crystal?&nbsp; The default&nbsp;seems like it should be changed though for the nrf connect sdk.</div> </div><div style="clear:both;"></div>RE: Firmware blocked until RTT connectshttps://devzone.nordicsemi.com/thread/548356?ContentTypeID=1Wed, 10 Sep 2025 11:37:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:21f1bb78-4e8d-4c5a-9483-d9290df74767Menon<p>Hello,</p> <p>What happens when you use the log backend with Zephyr logging over RTT instead of the console? Do you still experience the same issue? See <a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/kconfig/index.html#CONFIG_LOG_BACKEND_RTT">CONFIG_LOG_BACKEND_RTT</a></p> <p>Kind regards,</p> <p>Abhijith</p><div style="clear:both;"></div>RE: Firmware blocked until RTT connectshttps://devzone.nordicsemi.com/thread/548111?ContentTypeID=1Mon, 08 Sep 2025 21:43:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:44b5f31a-22cd-478f-90b7-258100255cc1scottc19<p>nrf Connect SDK 3.1.0 and custom board as mentioned</p><div style="clear:both;"></div>RE: Firmware blocked until RTT connectshttps://devzone.nordicsemi.com/thread/547960?ContentTypeID=1Fri, 05 Sep 2025 16:15:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c20988b-9558-4e44-b4af-678db30d1c66Menon<p>Hello,</p> <p>Which SDK version are you using? Also, are you testing this on a DK or a custom board?</p> <p>Kind regards,<br /> Abhijith</p><div style="clear:both;"></div>