sparkfun/SparkFun_u-blox_GNSS_v3

Suggestion: Clear survey-in observation time with disableSurveyMode()

adamgarbo opened this issue · 2 comments

adamgarbo commented

Hi @PaulZC,

I've done some testing with starting and stopping the survey-in procedure and noticed that the observation time does not get reset when .disableSurveyMode() is called. A minor suggestion that the function clears the value of dur in UBX-NAV-SVIN when called.

Cheers,
Adam

PaulZC commented

Hi Adam (@adamgarbo ),

AFAIAA there is no way to set dur to zero. I think only starting a new survey does that. I can't see a way to clear it using CFG-TMODE5 or the Configuration Interface. And you can't set it to zero with NAV-SVIN...

Sorry, I'm closing this one because I don't think we can implement it,
Paul

adamgarbo commented

Thanks for looking into this, Paul!

It seems like it's just some strange inherent behaviour of the u-blox ZED-F9P. I'll keep looking into it. My main worry is that if the duration never resets and a second survey is started, it may bypass the minimum observation time criteria.

Cheers,
Adam