https://devzone.nordicsemi.com/f/nordic-q-a/23540/twi-bus-freeze-after-several-thousand-tx-rx-cyclesI&#39;m periodically polling a TWI sensor with a blocking call, as in ret_code_t err_code; m_xfer_done = false; err_code = nrf_drv_twi_tx(&amp;i2c, address, subAddress, 1, true); APP_ERROR_CHECK(err_code); while (m_xfer_done == false) {}; if (err_codeen-USTelligent Community 13Tue, 18 Jul 2017 18:28:11 GMThttps://devzone.nordicsemi.com/thread/92461?ContentTypeID=1Tue, 18 Jul 2017 18:28:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:426d3ddd-5d27-48a0-b47f-600b8324c2dfJTL<p>I have no idea why this helps, but all problems vanish when I enable the softdevice. It&#39;s weird, since I&#39;m not actually using the softdevice, but all I&#39;ve done is</p> <pre><code>SOFTDEVICE_HANDLER_INIT(&amp;clock_lf_cfg, NULL); softdevice_app_ram_start_get(&amp;ram_start); softdevice_enable(&amp;ram_start); </code></pre> <p>and now things are rock-solid. 28,000 data collection and FLASH-write cycles and still going strong....</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/92462?ContentTypeID=1Mon, 17 Jul 2017 11:28:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fef8dcbd-cf02-4337-b72d-e28fb971ab7bStian R&#248;ed Hafskjold<p>What does the APP_ERROR_CHECK() tell you? Does it ever end up in there with an error code, or is it stuck in the while loop waiting for the <code>m_xfer_done</code> flag?</p><div style="clear:both;"></div>