https://devzone.nordicsemi.com/f/nordic-q-a/26538/accurate-timestamps-from-nrf-boardsHi, I would like to have accurate (1-5ms), synchronized timestamps for logging events from a set of nRF5x boards, spaced tens of meters apart. Each nRF5x board is connected to a Rapberry Pi, and each RPi forwards RTT logging messages using the JLinken-USTelligent Community 13Tue, 07 Nov 2017 09:56:25 GMThttps://devzone.nordicsemi.com/thread/104402?ContentTypeID=1Tue, 07 Nov 2017 09:56:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:873fa14b-2e93-4565-9999-d83ca011366eBj&#248;rn Kvaale<p>Hi Elm, have you had any success using Matt&#39;s idea above?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/104401?ContentTypeID=1Thu, 02 Nov 2017 14:41:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0d47a2f1-1b0b-45a2-b658-592fb1a1bb29Matt<p>A (cheaper) alternative is to connect the nRF5x chip/module (not DK, hence no JLink OB) to RasPi through the uart (assuming the nRF5x uart is available!). Then run a rtc with 1ms accuracy in the nRF5x and imbed that local timestamp into the log, and forward the log to RasPi through uart, and have a daemon maintains the GMT and thus convert the local timestamp to a global one. The RasPi needs to get the GMT from somewhere, be it from the gmt website or from another GSM module (eg. a Telit GE866) connected to it.</p><div style="clear:both;"></div>