nRF9160 1PPS stopping when GPS fix is lost

RE: nRF9160 1PPS stopping when GPS fix is lost

jenga — Wed, 01 Dec 2021 21:41:00 GMT

Now that Programmer V2.0.1 has been released I've been able to program modem firmware V1.3.1. I'll do some testing over the next few days and get back to you.

RE: nRF9160 1PPS stopping when GPS fix is lost

JONATHAN LL — Fri, 26 Nov 2021 09:09:22 GMT

Follow up question: Could you provide the source code that you are using. We would be able to check if there is anything suspect going on then.

Note: If you dont want to share it publicly i can make this case private.

RE: nRF9160 1PPS stopping when GPS fix is lost

JONATHAN LL — Thu, 25 Nov 2021 14:35:03 GMT

Hi,

There does not seem to be an issue with 1PPS in version 1.3.0. Could you perhaps share some more info on how you measure and setup etc?

If the receiver was configured for one-time pulse mode (by using zero pulse interval), it would output one pulse at first fix, and then no more pulses. Can you confirm that you gett more than one pulse? Just so that we are 100% certain that this is not the issue.

Regards,
Jonathan

RE: nRF9160 1PPS stopping when GPS fix is lost

jenga — Tue, 23 Nov 2021 20:52:30 GMT

Hi,

As far as I know I'm not using 'one-time pulse mode', but there is no mention of it in the documentation.

I would love to upgrade to modem firmware V1.3.1, but unfortunately the V2.0.0 programming utility is broken and gives a 'no matching trait found' error when I try to upgrade the modem firmware.

RE: nRF9160 1PPS stopping when GPS fix is lost

JONATHAN LL — Tue, 23 Nov 2021 15:05:55 GMT

Hi,

Make sure you are not using "one-time pulse mode".

Could you test mfw v1.3.1 and see if the you have the same issue?

If the same issue still persists then could you provide a modem trace.

Regards,
Jonathan