https://devzone.nordicsemi.com/f/nordic-q-a/18266/use-rtos-and-xtimercreate-timer-faster-than-the-actual-sdk12-52832Timer for defining 20ms cycle: // Create timers. m_test_timer = xTimerCreate(&quot;TEST&quot;, 20, pdTRUE, NULL, test_timeout_handler); I found eight cycles, fast 6msen-USTelligent Community 13Tue, 13 Dec 2016 11:28:04 GMThttps://devzone.nordicsemi.com/thread/70535?ContentTypeID=1Tue, 13 Dec 2016 11:28:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5db6b669-64b6-494e-8f3a-738c8030de20Susheel Nuguru<p>Assuming you have the below optimum value for nRF port</p> <p>#define configTICK_RATE_HZ 1024 </p> <p>The RTC will generate 1024 ticks a second which is 1/1024 = 0.976 ms per tick (little less than 1ms)</p> <p>xTimerCreate takes number of ticks as argument. So 20 means 20 RTOS ticks. One RTOS tick in our port is 0.976ms because we cannot generate an accurate 1ms tick using the RTC (as we cannot have non integral prescalar). So for 20 ticks you will get 20*0.9765 = 19.5ms.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/70534?ContentTypeID=1Sat, 10 Dec 2016 07:30:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:741e6de7-eac8-4941-a5ee-a00b21d286d9Susheel Nuguru<p>Please try the patches mentioned in this thread <a href="https://devzone.nordicsemi.com/question/105973/freertos-changes-for-better-rtos-timer-accuracy/">devzone.nordicsemi.com/.../</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/70533?ContentTypeID=1Fri, 09 Dec 2016 14:31:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:717fcbbf-e633-4373-b45e-6dde93b28bfaju<p>I used SDk12.0.0</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/70532?ContentTypeID=1Thu, 08 Dec 2016 20:34:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d8da732f-d48f-4898-b5f6-2c657bf0c655Susheel Nuguru<p>which SDK version are you using?</p><div style="clear:both;"></div>