https://devzone.nordicsemi.com/f/nordic-q-a/126669/ble-controller-unresponsive-command-opcode-0x2032-timeout-with-err--11Hello, I am following this course: https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-3-bluetooth-le-connections/topic/blefund-lesson-3-exercise-2/ but when I get to step 7. Set our preferred PHY then I am runningen-USTelligent Community 13Thu, 22 Jan 2026 18:56:39 GMThttps://devzone.nordicsemi.com/thread/559406?ContentTypeID=1Thu, 22 Jan 2026 18:56:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4465c02c-c7a9-46f1-a065-1a43fe6be7e7R.L<p>ANSWER: adding the following symbols to my prj.conf fixed the problem. The actual problem, if I am correct, is that these symbols are only said to be included later on in the instructions.</p> <p></p> <p><pre class="ui-code" data-mode="text">CONFIG_BT_RX_STACK_SIZE=2048 CONFIG_BT_BUF_CMD_TX_COUNT=2</pre></p><div style="clear:both;"></div>