https://devzone.nordicsemi.com/f/nordic-q-a/75673/nrf52832-example-hanging-on-softdevice-enableHi, I&#39;m trying to run the peripheral heart rate service example on a custom board using the internal 32kHz RC oscillator. However, the code hangs when soft device is enabled, at the highlighted line below. Project: ble_app_hrs_pca10040e_s112 CRITICAL_REGION_ENTERen-USTelligent Community 13Thu, 27 May 2021 01:06:19 GMThttps://devzone.nordicsemi.com/thread/311923?ContentTypeID=1Thu, 27 May 2021 01:06:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c5895194-6243-41d7-8013-e65d0c5c0d3eNoelle<p>Solved my own problem. I didn&#39;t&nbsp;change the LF clock accuracy from 20ppm to 500ppm for the RC oscillator. Should have been:</p> <pre><span>#define NRF_SDH_CLOCK_LF_ACCURACY 1</span></pre><div style="clear:both;"></div>