https://devzone.nordicsemi.com/f/nordic-q-a/83717/gnss-restart-after-single-shotI am using the GNSS Sample in SDK 1.8.99 to test sleep/wake cycles. The GNSS example is correctly operating in single shot mode by setting the interval to 0. After getting a single fix, execution ceases and current draw drops. I created a kernel timeren-USTelligent Community 13Mon, 17 Jan 2022 12:47:43 GMThttps://devzone.nordicsemi.com/thread/348037?ContentTypeID=1Mon, 17 Jan 2022 12:47:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a70f2a92-6350-4f68-a905-7fb0f91b51faAlbrecht Markus Schellenberger<p lang="en-GB">Hello David,</p> [quote user=""]What other steps are required to restart the gnss?&nbsp; Would I have a different result if I put the system to sleep directly with __WFI() vs using the built in sleep from the GNSS lib?[/quote] <p lang="en-GB">I’m honestly not quite sure why you are not able to restart the GNSS, but I wonder if this could have something to do with stopping/starting the GNSS in a kernel timer expiry function.</p> <p lang="en-GB">Does it make any difference if you offload the calls of the GNSS functions to a system workqueue handler instead, as illustrated <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.8.0/zephyr/reference/kernel/timing/timers.html#using-a-timer-expiry-function">here</a>?</p> <p lang="en-GB">Another alternative might be to just add the restart of the GNSS in the polling event for <a href="https://github.com/nrfconnect/sdk-nrf/blob/v1.8.0/samples/nrf9160/gnss/src/main.c#L448">new available PVT data</a>.</p> <p lang="en-GB">Regards,</p> <p lang="en-GB">Markus</p><div style="clear:both;"></div>