https://devzone.nordicsemi.com/f/nordic-q-a/39733/nrf_log-rtt-backend-suddenly-stops-working-sdk15-0-0Hi, I&#39;m using NRF_LOG to print information via RTT backend (RTT viewer v6.20) and it has been working so far. After adding a single call to a function that reads 128 bytes of data from an RFID tag to a RAM buffer (RFID reader IC over SPI) the logs stopen-USTelligent Community 13Tue, 23 Oct 2018 11:21:52 GMThttps://devzone.nordicsemi.com/thread/154057?ContentTypeID=1Tue, 23 Oct 2018 11:21:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ddf16213-1229-4c8d-aeea-7bef1166cc96OlaHallstrom<p>Found the solution!</p> <p>My RFID read call was using a too small buffer causing write in unknown memory, and Hardfault exception. After fixing this, NRF_LOG is alive again. Sorry for bothering you with this but it kind of helped me just summarizing the problem.</p> <p>//Ola</p><div style="clear:both;"></div>