https://devzone.nordicsemi.com/f/nordic-q-a/63594/i2c-getting-struck-and-sda-stays-lowWe are using I2C bus for communication with a RTC and Accelerometer. But sometimes the I2C get struck in i2c_write. It does not happens always it may happen randomly. We are able to generate it in two ways: 1. Let the device run for some time and suddenlyen-USTelligent Community 13Sun, 12 Jul 2020 15:39:56 GMThttps://devzone.nordicsemi.com/thread/259584?ContentTypeID=1Sun, 12 Jul 2020 15:39:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0fc5c1bf-ad18-4dc9-8a19-39e8200e876cSimon<p>Have you tried to debug your sample and check, more specifically than <em>i2c_write()</em>,&nbsp;what&nbsp;causes the I2C to stop working? Where in&nbsp;<em>ncs\v1.3.0\zephyr\drivers\i2c\i2c_nrfx_twim.c--&gt;i2c_nrfx_twim_transfer()&nbsp;</em>and&nbsp;<em>ncs\v1.3.0\modules\hal\nordic\nrfx\drivers\src\nrfx_twim.c--&gt;nrfx_twim_xfer()</em> does it stop?</p> <p>Use the&nbsp;<a href="https://devzone.nordicsemi.com/nordic/nrf-connect-sdk-guides/b/getting-started/posts/nrf-connect-sdk-tutorial---part-3-temporary#h131sk0f71xdy1hliuda1vq9p8n11weqgr">debugging section in the NCS tutorial</a>&nbsp;or logging to figure out the cause.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>