https://devzone.nordicsemi.com/f/nordic-q-a/28652/no-serial-output-through-rtt-target-device-thingyHey Dev zone, I flashed my application onto my Nordic Thingy board (through Onboard Jlink debugger present on nrf52840 dev board), and can see some pretty colors (LEDs lighting up.). I want to use SEGGER RTT to view some serial output. In my main.cen-USTelligent Community 13Tue, 19 Dec 2017 14:07:17 GMThttps://devzone.nordicsemi.com/thread/113582?ContentTypeID=1Tue, 19 Dec 2017 14:07:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3634e745-fb5c-4123-a8c4-64fc15bc2ec6Bj&#248;rn Kvaale<p>Hopefully one of these three links will help: <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v13.0.0%2Fnrf_log.html&amp;cp=4_0_0_3_20">link 1</a>, <a href="https://devzone.nordicsemi.com/question/78527/nrf52-rtt-debug-problem/">link 2</a>, <a href="https://devzone.nordicsemi.com/question/117934/segger_rtt-works-but-nrf_log-not/">link 3</a>. Also, if you want to flash custom FW onto the Thingy:52 device, you will need to use secure DFU to flash the FW onto the Thingy:52. Here&#39;s a <a href="https://devzone.nordicsemi.com/blogs/1085/getting-started-with-nordics-secure-dfu-bootloader/">good blogpost post</a> to get you started. Also have a look at <a href="https://devzone.nordicsemi.com/question/177761/custom-application-for-thingy-52/">this devzone case</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/113581?ContentTypeID=1Tue, 19 Dec 2017 02:23:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:45c37a5c-6928-47b6-9ac9-8863dde32824Matt<p>Not sure about Nordic Thingy, but for nRF52 DK and sdk12 I have this in the makefile</p> <p>CFLAGS += -DNRF_LOG_USES_RTT=1</p><div style="clear:both;"></div>