nrf52840: RTT shell on the custom board not workinghttps://devzone.nordicsemi.com/f/nordic-q-a/121435/nrf52840-rtt-shell-on-the-custom-board-not-workingHi, We want to enable zephyr shell over RTT on our custom board based on nrf52840. I tried the &#39;shell_module&#39; sample with prj_minimal_rtt.conf and it works fine on nrf52840 devkit with nrf5340 (version command return the zephyr version in RTT vieweren-USTelligent Community 13Tue, 13 May 2025 14:44:54 GMTRE: nrf52840: RTT shell on the custom board not workinghttps://devzone.nordicsemi.com/thread/535173?ContentTypeID=1Tue, 13 May 2025 14:44:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ce7924c8-00b6-4790-abcc-de1f76d23905H&#229;kon Alseth<p>Great to hear, Amir. Hope you have a wonderful day!</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>H&aring;kon</p><div style="clear:both;"></div>RE: nrf52840: RTT shell on the custom board not workinghttps://devzone.nordicsemi.com/thread/535153?ContentTypeID=1Tue, 13 May 2025 13:48:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:58a7f6d1-b1ef-4f5a-ab95-0e6a1570f484amiramin<p>CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC option did the trick. RTT shell is working fine both with custom board DTS and nrf52840dk DTS</p><div style="clear:both;"></div>RE: nrf52840: RTT shell on the custom board not workinghttps://devzone.nordicsemi.com/thread/535114?ContentTypeID=1Tue, 13 May 2025 12:03:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:33debade-feda-45b1-b674-745b70e089bcH&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>Does your design have DCDC inductors and/or external 32 kHz xtal?</p> <p>&nbsp;</p> <p>If any of these is not present in your design, you can try to disable them:</p> <p><pre class="ui-code" data-mode="text"># Select internal RC oscillator as 32KHz clock source CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y # Disable DCDC regulator CONFIG_BOARD_ENABLE_DCDC=n</pre></p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>