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Thread: GPS date/time sync behavior

  1. #1
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    GPS date/time sync behavior

    I'm planning to use the GPS date/time sync feature in RR on a CarPC that's always in standby or hibernate and both RR and Navi software always running at the same time.

    How does RR schedule time/date sync? Will it sync coming out of standby/hibernate?

    Do I need a serial port splitter (i.e. GpsGate) to have both RR sync feature and Navi software running in parallel? The failure mode would be PC coming out of standby with both RR and Navi SW running, Navi grabs the com port, then RR trys to sync and fails to open port or vice versa.

    On a related topic, the volume control via GPS speed: Does RR also need constant access to the com port?

    Thanks,
    Bryan

  2. #2
    FLAC Machinehead's Avatar
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    I have had issues with the GPS date/time sync. It caused my clock to go wonky a few times and it set the time wrong.

    You will definitely need a port splitter, otherwise RR will lock out the port you select for it and your navi software won't work. GPSGate is a good choice, I perfer it to Xport. Xport is free though, so that's a consideration.

    The GPS speed volume control does not need access to the com port, that's based on IGuidance sending wav data and RR picks that up.

  3. #3
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    Quote Originally Posted by Machinehead View Post
    I have had issues with the GPS date/time sync. It caused my clock to go wonky a few times and it set the time wrong.
    The ability for this to work correctly has a lot to do with the brand of GPS antenna that you are using. There is supposed to be a standard gps string format that its supposed to send to the comp but after guino added the feature, found that different ones send out the date/time in different formats. Which makes this feature a hit/miss kinda one.

    Quote Originally Posted by Machinehead View Post
    You will definitely need a port splitter, otherwise RR will lock out the port you select for it and your navi software won't work. GPSGate is a good choice, I perfer it to Xport. Xport is free though, so that's a consideration.
    I'll second that XPort recommendation!

    Quote Originally Posted by Machinehead View Post
    The GPS speed volume control does not need access to the com port, that's based on IGuidance sending wav data and RR picks that up.
    Just FYI, the GPS speed vol( GPS Speed Att) actually uses the data from RR's com port, as do some other of RR's built in GPS type featues..
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    FLAC Machinehead's Avatar
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    Quote Originally Posted by Blue ZX3 View Post
    Just FYI, the GPS speed vol( GPS Speed Att) actually uses the data from RR's com port, as do some other of RR's built in GPS type featues..
    You would definitely know better than I. Thanks for catching my mistake.

  5. #5
    What can I say? I like serial. Curiosity's Avatar
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    Make sure you get all the windows updates if you're an hour off right now. I think KB942763 fixed the DST change.

  6. #6
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    M$ updates... We don't need no stink'n updates...
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  7. #7
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    I personally do not recommend setting RR to set the time via GPS. I had done this at one time and it set it like months off from the correct date and time! I have seen many many reports of this. This is not really a RR problem, but the way the GPS does not have a "good enough lock" even though it appears to, and sets the time with what it has, as incorrect as it may be.
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    Thanks guys, so it seems that the RR time/date can have some irregularities. Shouldn't RR look at other NMEA sentences to verify proper satellite lock before updating?

  9. #9
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    That could be the problem too. If I'm correct, RR has to see at least 3 sats locked before it will assume incoming gps data is good.
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  10. #10
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    Quote Originally Posted by JohnWPB View Post
    I personally do not recommend setting RR to set the time via GPS. I had done this at one time and it set it like months off from the correct date and time!
    I had the exact same experience. I want to say it was like 4 months off.
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