https://devzone.nordicsemi.com/f/nordic-q-a/105745/about-using-other-rtosesWhen using the nRF Connect SDK, the zephyr RTOS can be used. Can I use another RTOS I am familiar with instead of the zephyr RTOS?en-USTelligent Community 13Thu, 16 Nov 2023 12:13:10 GMThttps://devzone.nordicsemi.com/thread/455957?ContentTypeID=1Thu, 16 Nov 2023 12:13:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:30fd6e02-cc0c-49f3-bcdb-60595ec60e77runsiv<p>Hi Yoshiki&nbsp;</p> <p>NCS only support Zephyr, however our old <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/lib_rtos.html">SDK5 supports FreeRTOS</a></p> <p>However it should be noted that SDK5 is in maintenance mode and have not received new features for a while.&nbsp;</p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>