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Thread: GPS device diagnostic

  1. #1
    Variable Bitrate lastberserker's Avatar
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    Question GPS device diagnostic

    I got my Rayming MR-350 yesterday. It has USB-to-serial adapter and looks like a COM port to XP. Now, the problem is, the device doesn't seem to work properly - it is not detected by enclosed software (GPSInfo) and when I connect to that COM port on 4800 baud, there is a lot of seemingly random binary garbage coming from it

    Is there some software that can check and properly setup a GPS device?
    Asus K8S-MX ~ Athlon 64 2800+ ~ Kingmax MPXD42D-2K 1Gb ~ Seagate ST960822A 60Gb ~ PSK-3100 PS/2 kbd ~ MR-350 GPS ~ Hawking HSB1AP ~ Buffalo WLI-USB-G54 ~ 8" Dynamix TS LCD ~ DSATX ~ XCard ~ TVedia ~ some LCD TV ~ Vista ~ MapPoint 2006 ~ iGuidance 2.*

  2. #2
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    You installed a driver with the USB-serial adaptor, right? Right click "My computer", select properties and go to device manager. Look at the COM ports. Your USB-serial adaptor ought to show up there and you should be able to see what com port it is on. (Sorry, rereading your post it looks like you may have done that but I'm not sure so I'll leave the instructions in).

    Beyond that, XBrady's earlier version of GPSsecure had a little window that you could see the NMEA strings streaming by and it shows the satellite locks. Maybe PM him for a version 1.0 of it.
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  3. #3
    Variable Bitrate lastberserker's Avatar
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    Quote Originally Posted by Bugbyte
    You installed a driver with the USB-serial adaptor, right? Right click "My computer", select properties and go to device manager. Look at the COM ports. Your USB-serial adaptor ought to show up there and you should be able to see what com port it is on. (Sorry, rereading your post it looks like you may have done that but I'm not sure so I'll leave the instructions in).

    Beyond that, XBrady's earlier version of GPSsecure had a little window that you could see the NMEA strings streaming by and it shows the satellite locks. Maybe PM him for a version 1.0 of it.
    I found it - the thing was sending data in SiRF binary format at 38400 baud rate. Still does SiRFDemo did a good job detecting the protocol, but cannot switch it to NMEA.
    Asus K8S-MX ~ Athlon 64 2800+ ~ Kingmax MPXD42D-2K 1Gb ~ Seagate ST960822A 60Gb ~ PSK-3100 PS/2 kbd ~ MR-350 GPS ~ Hawking HSB1AP ~ Buffalo WLI-USB-G54 ~ 8" Dynamix TS LCD ~ DSATX ~ XCard ~ TVedia ~ some LCD TV ~ Vista ~ MapPoint 2006 ~ iGuidance 2.*

  4. #4
    FLAC Marvin Hlavac's Avatar
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    Hmm, I read your other post where you mentioned MS Streets & Trips. S&T will have hard time with 38400 baud rate. Try GPS Gate GPS Gate might just be able to read the signal coming from your receiver, and it may output signal understandable by your S&T.

    It will not cost you anything to try, and it may just work. If it does, the added benefit of GPS Gate is that you will be able to use even several GPS software applications with your one receiver.

    MR-350 is advertised as supporting NMEA. I'm not sure why it would be outputting SiRF. I'm assuming you do have the correct cable and driver software installed. You mentioned you couldn't switch from SiRF to NMEA in SiRFdemo. If just clicking on "Switch to NMEA protocol" doesn't work, I would try clicking on "Synchronize protocol & baud rate".

  5. #5
    Variable Bitrate lastberserker's Avatar
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    Quote Originally Posted by Marvin Hlavac
    Hmm, I read your other post where you mentioned MS Streets & Trips. S&T will have hard time with 38400 baud rate. Try GPS Gate http://franson.com/gpsgate/ GPS Gate might just be able to read the signal coming from your receiver, and it may output signal understandable by your S&T.

    It will not cost you anything to try, and it may just work. If it does, the added benefit of GPS Gate is that you will be able to use even several GPS software applications with your one receiver.
    Yes, it looks like a very nice piece of software I didn't find however any mentioning of the SiRF binary support.

    Quote Originally Posted by Marvin Hlavac
    MR-350 is advertised as supporting NMEA. I'm not sure why it would be outputting SiRF. I'm assuming you do have the correct cable and driver software installed. You mentioned you couldn't switch from SiRF to NMEA in SiRFdemo. If just clicking on "Switch to NMEA protocol" doesn't work, I would try clicking on "Synchronize protocol & baud rate".
    "Switch to NMEA" has no effect and "Synchronize" syncs back to 38400 / SiRF binary It appears to me that none of the SiRFDemo commands are passed to this receiver, even those in "Poll" menu add nothing to received messages.
    Asus K8S-MX ~ Athlon 64 2800+ ~ Kingmax MPXD42D-2K 1Gb ~ Seagate ST960822A 60Gb ~ PSK-3100 PS/2 kbd ~ MR-350 GPS ~ Hawking HSB1AP ~ Buffalo WLI-USB-G54 ~ 8" Dynamix TS LCD ~ DSATX ~ XCard ~ TVedia ~ some LCD TV ~ Vista ~ MapPoint 2006 ~ iGuidance 2.*

  6. #6
    FLAC Marvin Hlavac's Avatar
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    Earlier I read that the 350 needed some special cable. Do you have that?

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    FLAC IntellaWorks's Avatar
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    I know nothing about the GPS chip your using but I know that some have firmware updates that you can apply.. It's possible that that may solve some of your issues...
    Progress [I will seriously never be done!]
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  8. #8
    Variable Bitrate lastberserker's Avatar
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    Quote Originally Posted by Marvin Hlavac
    Earlier I read that the 350 needed some special cable. Do you have that?
    Sure I do, it's PS/2-like (no clue what's the right name for it) to USB pigtail adapter.
    Asus K8S-MX ~ Athlon 64 2800+ ~ Kingmax MPXD42D-2K 1Gb ~ Seagate ST960822A 60Gb ~ PSK-3100 PS/2 kbd ~ MR-350 GPS ~ Hawking HSB1AP ~ Buffalo WLI-USB-G54 ~ 8" Dynamix TS LCD ~ DSATX ~ XCard ~ TVedia ~ some LCD TV ~ Vista ~ MapPoint 2006 ~ iGuidance 2.*

  9. #9
    Variable Bitrate lastberserker's Avatar
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    Quote Originally Posted by IntellaWorks
    I know nothing about the GPS chip your using but I know that some have firmware updates that you can apply.. It's possible that that may solve some of your issues...
    It has SiRF Star III chip, it's new and I haven't seen any updates for it yet
    Asus K8S-MX ~ Athlon 64 2800+ ~ Kingmax MPXD42D-2K 1Gb ~ Seagate ST960822A 60Gb ~ PSK-3100 PS/2 kbd ~ MR-350 GPS ~ Hawking HSB1AP ~ Buffalo WLI-USB-G54 ~ 8" Dynamix TS LCD ~ DSATX ~ XCard ~ TVedia ~ some LCD TV ~ Vista ~ MapPoint 2006 ~ iGuidance 2.*

  10. #10
    FLAC IntellaWorks's Avatar
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    GRRR man, that sucks. Have you tried any other GPS diag software ??
    Progress [I will seriously never be done!]
    Via EPIA MII
    512MB RAM
    OEM GPS (embedded)
    nLite WinXP pro on
    1GB Extreme III CF card
    Carnetix 1260 startup/ DC-DC regulator
    Software: Still, re-Writing my existing front end in .Net

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