https://devzone.nordicsemi.com/f/nordic-q-a/13575/time-stamped-event-loggingHello Nordic, For my application I need to log external and internal events/state of my device. In order to do so, I need to find a way to keep track on time. I do not have the option to use external RTC, so I need to rely on nrf51 peripherals. Additionallyen-USTelligent Community 13Mon, 02 May 2016 08:27:43 GMThttps://devzone.nordicsemi.com/thread/51776?ContentTypeID=1Mon, 02 May 2016 08:27:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e5dd4101-97a5-4519-946f-9691491fba04&#216;yvind Karlsen<p>Hi,</p> <p>You can base your timekeeping on the RTC, the application timer is based on the RTC, so in terms of peripheral power consumption you should see the same current.</p> <p>Since the RTC is based on the low frequency clock, which runs from a low cost crystal, or alternately an internal RC oscillator you will not get good long term performance as the clocks will drift. If one of your devices has a stable UTC clock reference available, you could discipline the clock of your other devices. This all depends on what accuracy you need from your timing references.</p> <p>Best regards,</p> <p>Øyvind</p><div style="clear:both;"></div>