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problems with GPS-PA6B module

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  • Atilla
    replied


    Thank you and happy to hear you've resolved your problems.

    Leave a comment:


  • vafonkin
    replied


    I finally was able to solve all the issues with great help from 4d support. Support was very responsive and I would advise anyone to use their products and services.
    Thank you for help.

    Leave a comment:


  • ESPsupport
    replied


    It is unfortunate about the baud rate, it should be what the datasheet says and we are sorry that it isn't



    As you can see further down in this thread you can change it to whatever (with in reason) you want it to be. (err, once you have found out what it currently is, that is)

    Leave a comment:


  • vafonkin
    replied


    Its difficult to assume data sheet is correct because it has a wrong baud rate on it 9600 when it should be 4800, but even then it is 5000 on some reason on device itself. Or may be I am just unlucky

    Thank you for advice, I will try.

    Leave a comment:


  • ESPsupport
    replied


    Try assuming the datasheet is correct.



    Convert the fractions of minutes into seconds and then put that into google maps

    Leave a comment:


  • vafonkin
    replied


    I follow data sheet and this is what I enter in googlemaps:
    Lat: ddmm.mmmm (should read as .ssss in data sheet)
    Lon: dddmm.mmmm

    First two char for dd is for degrees, then mm for minutes, then last for for seconds, I.e:

    This is what I am getting from module: for lat: 4218.4506 , for Lon: 07112.0733
    Here is how I enter in googlemaps and it is about 500 meters off.

    42 18 45.06
    -071 12 07.33

    I did convert to decimals and it show same location

    I compare geographic coordinates from module vs geographic coordinates on
    iPhone
    Gps reading on my iPhone is slightly different and show accurate location.

    Leave a comment:


  • ESPsupport
    replied


    Also check the measurement units. (although that usually causes larger than 500m errors)

    Leave a comment:


  • ESPsupport
    replied


    How do you know it's 500m out?



    If you are calculating / converting / rounding please check your calculations.



    As I recall one 'commonly found' routine on the net only converts one of the figures to 4 decimals and you need to goto 6 to get 'proper' accuracy.

    Leave a comment:


  • vafonkin
    replied


    Another weird behavior: coordinates it's showing about 500 meters off from my location. Always. I am getting 3D lock with at least 11 satellites, all data present and good. Any ideas why?

    Leave a comment:


  • vafonkin
    replied


    I got it working at 5000 baud... Weird, but working..

    Can you please tell me how to get a magnetic declination? It says chip supports it but there is no data provided in a sentence.

    Leave a comment:


  • vafonkin
    replied


    I have connected it to PIC16F886 and display characters on LCD. I use 2 different USE RS232 streams, both with 4800 baud rate. I do have scope.
    Timing for 1 bit is 200us

    Sounds like another odd baud rate... 5000. How come?

    Leave a comment:


  • ESPsupport
    replied


    What are you connecting it to and how?



    Do you have a scope available, so that you can perhaps calculate the actual baud rate?



    Can you give a few seconds of what you are seeing, at, say 9600?

    Leave a comment:


  • vafonkin
    replied


    I have same product and having same problems - getting garbage from GPS. I have done everything by the data sheet, all connections and elements in place, backup power supply, low voltage ripple, and can't get it working not matter what I am trying to do. I am getting fix from module and I can see data is coming with 1 sec intervals, but can't read it. I believe problem is with baud rate. I tried 4800, 9600, 3200 and others and just getting nowhere.

    Leave a comment:


  • koumpakias
    replied


    Just to close this thread by saying that the module has worked perfectly well. It was a mistake to experiment with the module on the breadboard. 4D support has been of great help.

    I have finally designed my pcb by taking extra care on the ground connection, and placing the LM2936Z-3.3 regulator very close to the module with plenty of capacitance close to the module connections. I did not include the indicating LED and its associated resistor.

    Now the module auto-selects 4800 baud all the time and provides time and position information pretty quickly. Both me and my customer are very happy.

    Thank you for your help.

    Leave a comment:


  • 4dTechSupport
    replied


    Please contact [email protected]

    Leave a comment:

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