https://devzone.nordicsemi.com/f/nordic-q-a/23955/freertos-with-rtt-logging-causes-hardfaultMY application is using SDK 12.2, SD132 v3.1 and freeRTOS. I&#39;m trying to debug a sensor that uses TWI. When I enable logging. #define NRF_LOG_ENABLED 1, NRF_LOG_BACKEND_SERIAL_USES_UART 0 and, NRF_LOG_BACKEND_SERIAL_USES_RTT 1 I start to get hardfaultsen-USTelligent Community 13Thu, 10 Aug 2017 12:27:33 GMThttps://devzone.nordicsemi.com/thread/94303?ContentTypeID=1Thu, 10 Aug 2017 12:27:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3c27d555-45ca-4079-bf33-990ecc69d147Susheel Nuguru<p>not sure, i tried SDK 12.3 and this works fine. have you tried <a href="http://www.freertos.org/Debugging-Hard-Faults-On-Cortex-M-Microcontrollers.html">this</a></p><div style="clear:both;"></div>