BerryIMU-GPS v3 never getting a fix

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  • This topic has 8 replies, 4 voices, and was last updated 3 years ago by Matt.
Viewing 9 posts - 1 through 9 (of 9 total)
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  • #7892
    OzzMaker
    Participant

    The IMU seems to work perfectly, but I've been trying to get the GPS to work, and it just never seems to get a fix. I've left it with clear access to the sky for up to ~8hrs several times, but gpsmon always shows 0 satellites. I'm not sure what I'm doing wrong/if something is broken, but any ideas would be greatly appreciated!

    #7893
    Mark Williams
    Keymaster

    Hi.  is the GPS outside?   are you using an external or the internal antenna?  is the switch int he right position for the antenna you are using?

    Mark --OzzMaker.com --

    #7900
    OzzMaker
    Participant

    Thanks for your reply.

    I've tried both outside and inside, but when outside only for up to approximately an hour. Most of the time it has been inside by a window.  I'm using the internal antenna, and the switch is set to int[ernal].

    #7911
    OzzMaker
    Participant

    bump

    #7912
    PeterP
    Participant

    Hi.. sorry for the delay.

    can you please attach an image of the BerryGPS-IMU and how you have it mounted.

    Please also share the output of the GPS once it starts up.
    this is how.
    1. boot Pi without GPS connected
    2. kill gpsd   'sudo killall gpsd'
    3. cat serial port   'cat /dev/serial0'
    4. plug in GPS
    5. Send me the first 50 lines, i have pasted in an example below

    
    $GNTXT,01,01,02,ROM CORE 3.01 (107888)*2B
    $GNTXT,01,01,02,FWVER=SPG 3.01*46
    $GNTXT,01,01,02,PROTVER=18.00*11
    $GNTXT,01,01,02,GPS;GLO;GAL;BDS*77
    $GNTXT,01,01,02,SBAS;IMES;QZSS*49
    $GNTXT,01,01,02,GNSS OTP=GPS;GLO*37
    $GNTXT,01,01,02,LLC=FFFFFFFF-FF7F7C7F-FFED7FE8-FFFFFFFF-FFFFFF59*58
    $GNTXT,01,01,02,ANTSUPERV=AC *00
    $GNTXT,01,01,02,ANTSTATUS=DONTKNOW*2D
    $GNTXT,01,01,02,PF=3FF*4B
    $GNRMC,,V,,,,,,,,,,N*4D
    $GNVTG,,,,,,,,,N*2E
    $GNGGA,,,,,,0,00,99.99,,,,,,*56
    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
    $GPGSV,1,1,00*79
    $GLGSV,1,1,00*65
    $GNGLL,,,,,,V,N*7A
    $GNTXT,01,01,02,ANTSTATUS=INIT*3B
    $GNRMC,,V,,,,,,,,,,N*4D
    $GNVTG,,,,,,,,,N*2E
    $GNGGA,,,,,,0,00,99.99,,,,,,*56
    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
    $GPGSV,1,1,00*79
    $GLGSV,1,1,00*65
    $GNGLL,,,,,,V,N*7A
    $GNTXT,01,01,02,ANTSTATUS=OK*25
    $GNRMC,,V,,,,,,,,,,N*4D
    $GNVTG,,,,,,,,,N*2E
    $GNGGA,,,,,,0,00,99.99,,,,,,*56
    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E
    

    Peter --OzzMaker.com --

    #7914
    OzzMaker
    Participant

    Hi, thanks Peter

    I've attached a picture and the log below. I think the constant GNTXT lines suggests that the GPS is constantly rebooting, but I've tried different power supplies and cables, and they still appear so I might be wrong.

    https://ozzmaker.com/wp-content/uploads/hm_bbpui/7914/fue7nyn5le00zdnc12ivwhb3pm5bngyk.jpeg

     

    Lines 0 to 110 (/line 55 removing extra newlines)

    2?
    ?$GNTXT,01,01,02,FWVER=SPG 3.01*46

    $GNTXT,01,01,02,PROTVER=18.00*11

    $GNTXT,01,01,02,GPS;GLO;GAL;BDS*77

    $GNTXT,01,01,02,SBAS;IMES;QZSS*49

    $GNTXT,01,01,02,GNSS OTP=GPS;GLO*37

    $GNTXT,01,01,02,LLC=FFFFFFFF-FF7F7C7F-FFED7F96-FFFFFFFF-FFFFFF59*2A

    $GNTXT,01,01,02,ANTSUPERV=AC *00

    $GNTXT,01,01,02,ANTSTATUS=DONTKNOW*2D

    $GNTXT,01,01,02,PF=3FF*4B

    $GNRMC,,V,,,,,,,,,,N*4D

    $GNVTG,,,,,,,,,N*2E

    $GNGGA,,,,,,0,00,99.99,,,,,,*56

    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E

    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E

    $GPGSV,1,1,00*79

    $GLGSV,1,1,00*65

    $GNGLL,,,,,,V,N*7A

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,Nmsg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,02,ANTSTATUS=INIT*3B

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNRMC,,V,,,,,,,,,,N*4D

    $GNVTG,,,,,,,,,N*2E

    $GNGGA,,,,,,0,00,99.99,,,,,,*56

    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E

    $GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*2E

    $GPGSV,1,1,00*79

    $GLGSV,1,1,00*65

    $GNGLL,,,,,,V,N*7A

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

    $GNTXT,01,01,01,NMEA unknown msg*46

     

    (up to line 350 can be found here)

    https://pastebin.com/pK3fnqv9

     

     

    #7915
    PeterP
    Participant

    Thanks, the output looks fine... I see no problems.
    The images also look good

    please try and reset the GPS.
    1. start Pi with GPS connected
    2. kill gpsd if it is running sudo killall gpsd
    3. send reset to GPS module gpsctl -f -t u-blox -x '\x06\x04\xff\xff\x02\x00' /dev/serial0
    4. leave outside for 30 minutes

    If it doesn't work, please send a high quality photo and close up of this section;

     

    please send to sales < @ > ozzmaker.com

    Peter --OzzMaker.com --

    #7918
    OzzMaker
    Participant

    Thanks, I've tried resetting the GPS, but it didn't work so I've sent an email to sales@---. I've also included the picture I sent below:

    #13971
    Matt
    Participant

    Was there ever a solution to this problem? I've read through the thread and am having the same output as this user. Everything seems to be set up correctly. Any help that could be provided would be appreciated!

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