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NRF9160 GPS fix problem

Hello. I have a problem getting a position via GPS. My dev board is placed in a good place, but can't get a position after more than 1 hour. 

I am using you new SW version v1.0, and HW version 0.8.5 with firmware version 1.0.

The GPS example code works, sometimes I get a position after 1 hour.

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  • Hi Miro,

    Are you using the same GPS antenna which the other GPS module is using?

    The GPS antenna on the nRF9160 DK may perform differently than the other GPS module.
    I would highly recommend you to use an external antenna to improve the performance.

  • Hi Martin.

    Yes, I'm use same Molex helix GNNS antena. With external antena I have same problem

  • Hello Martin.


    - Yes, switch position is on the internal antenna, and i'm use internal antenna. I'm use same antenna with U-Blox ZOE GNSS module, without GPS amplifier, and all is works.

    This is my console output

    ***** Booting Zephyr OS v1.14.99-ncs2 *****
    Flash region		Domain		Permissions
    00 0x00000 0x08000 	Secure		rwxl
    01 0x08000 0x10000 	Non-Secure	rwxl
    02 0x10000 0x18000 	Non-Secure	rwxl
    03 0x18000 0x20000 	Non-Secure	rwxl
    04 0x20000 0x28000 	Non-Secure	rwxl
    05 0x28000 0x30000 	Non-Secure	rwxl
    06 0x30000 0x38000 	Non-Secure	rwxl
    07 0x38000 0x40000 	Non-Secure	rwxl
    08 0x40000 0x48000 	Non-Secure	rwxl
    09 0x48000 0x50000 	Non-Secure	rwxl
    10 0x50000 0x58000 	Non-Secure	rwxl
    11 0x58000 0x60000 	Non-Secure	rwxl
    12 0x60000 0x68000 	Non-Secure	rwxl
    13 0x68000 0x70000 	Non-Secure	rwxl
    14 0x70000 0x78000 	Non-Secure	rwxl
    15 0x78000 0x80000 	Non-Secure	rwxl
    16 0x80000 0x88000 	Non-Secure	rwxl
    17 0x88000 0x90000 	Non-Secure	rwxl
    18 0x90000 0x98000 	Non-Secure	rwxl
    19 0x98000 0xa0000 	Non-Secure	rwxl
    20 0xa0000 0xa8000 	Non-Secure	rwxl
    21 0xa8000 0xb0000 	Non-Secure	rwxl
    22 0xb0000 0xb8000 	Non-Secure	rwxl
    23 0xb8000 0xc0000 	Non-Secure	rwxl
    24 0xc0000 0xc8000 	Non-Secure	rwxl
    25 0xc8000 0xd0000 	Non-Secure	rwxl
    26 0xd0000 0xd8000 	Non-Secure	rwxl
    27 0xd8000 0xe0000 	Non-Secure	rwxl
    28 0xe0000 0xe8000 	Non-Secure	rwxl
    29 0xe8000 0xf0000 	Non-Secure	rwxl
    30 0xf0000 0xf8000 	Non-Secure	rwxl
    31 0xf8000 0x100000 	Non-Secure	rwxl
    Non-secure callable region 0 placed in flash region 0 with size 32.
    
    
    SRAM region		Domain		Permissions
    00 0x00000 0x02000	Secure		rwxl
    01 0x02000 0x04000	Secure		rwxl
    02 0x04000 0x06000	Secure		rwxl
    03 0x06000 0x08000	Secure		rwxl
    04 0x08000 0x0a000	Secure		rwxl
    05 0x0a000 0x0c000	Secure		rwxl
    06 0x0c000 0x0e000	Secure		rwxl
    07 0x0e000 0x10000	Secure		rwxl
    08 0x10000 0x12000	Non-Secure	rwxl
    09 0x12000 0x14000	Non-Secure	rwxl
    10 0x14000 0x16000	Non-Secure	rwxl
    11 0x16000 0x18000	Non-Secure	rwxl
    12 0x18000 0x1a000	Non-Secure	rwxl
    13 0x1a000 0x1c000	Non-Secure	rwxl
    14 0x1c000 0x1e000	Non-Secure	rwxl
    15 0x1e000 0x20000	Non-Secure	rwxl
    16 0x20000 0x22000	Non-Secure	rwxl
    17 0x22000 0x24000	Non-Secure	rwxl
    18 0x24000 0x26000	Non-Secure	rwxl
    19 0x26000 0x28000	Non-Secure	rwxl
    20 0x28000 0x2a000	Non-Secure	rwxl
    21 0x2a000 0x2c000	Non-Secure	rwxl
    22 0x2c000 0x2e000	Non-Secure	rwxl
    23 0x2e000 0x30000	Non-Secure	rwxl
    24 0x30000 0x32000	Non-Secure	rwxl
    25 0x32000 0x34000	Non-Secure	rwxl
    26 0x34000 0x36000	Non-Secure	rwxl
    27 0x36000 0x38000	Non-Secure	rwxl
    28 0x38000 0x3a000	Non-Secure	rwxl
    29 0x3a000 0x3c000	Non-Secure	rwxl
    30 0x3c000 0x3e000	Non-Secure	rwxl
    31 0x3e000 0x40000	Non-Secure	rwxl
    
    Peripheral		Domain		Status
    00 NRF_P0		Non-Secure	OK
    01 NRF_CLOCK		Non-Secure	OK
    02 NRF_RTC1		Non-Secure	OK
    03 NRF_NVMC		Non-Secure	OK
    04 NRF_UARTE1		Non-Secure	OK
    05 NRF_UARTE2		Secure		SKIP
    06 NRF_TWIM2		Non-Secure	OK
    07 NRF_SPIM3		Non-Secure	OK
    08 NRF_TIMER0		Non-Secure	OK
    09 NRF_TIMER1		Non-Secure	OK
    10 NRF_TIMER2		Non-Secure	OK
    11 NRF_SAADC		Non-Secure	OK
    12 NRF_PWM0		Non-Secure	OK
    13 NRF_PWM1		Non-Secure	OK
    14 NRF_PWM2		Non-Secure	OK
    15 NRF_PWM3		Non-Secure	OK
    16 NRF_IPC		Non-Secure	OK
    17 NRF_VMC		Non-Secure	OK
    18 NRF_FPU		Non-Secure	OK
    19 NRF_EGU1		Non-Secure	OK
    20 NRF_EGU2		Non-Secure	OK
    21 NRF_GPIOTE1		Non-Secure	OK
    
    SPM: NS image at 0xc000
    SPM: NS MSP at 0x20024748
    SPM: NS reset vector at 0x13ae9
    SPM: prepare to jump to Non-Secure image.
    ***** Booting Zephyr OS v1.14.99-ncs2 *****
    Staring GPS application
    Socket created
    Getting GPS data...
    Tracking: 1 Using: 0 Unhealthy: 1
    Seconds since last fix 0
    
    Scanning [|] Tracking: 1 Using: 0 Unhealthy: 1
    Seconds since last fix 0
    
    Scanning [/] Tracking: 0 Using: 0 Unhealthy: 0
    Seconds since last fix 1
    Scanning [-] Tracking: 0 Using: 0 Unhealthy: 0
    Seconds since last fix 1
    
    Scanning [\] Tracking: 0 Using: 0 Unhealthy: 0
    Seconds since last fix 2
    Scanning [|] Tracking: 0 Using: 0 Unhealthy: 0
    Seconds since last fix 2
    
    Scanning [/] Tracking: 0 Using: 0 Unhealthy: 0
    Seconds since last fix 3
    
    Scanning [-] Tracking: 0 Using: 0 Unhealthy: 0
    Seconds since last fix 3
    
    Scanning [\] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 4
    
    Scanning [|] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 4
    
    Scanning [/] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 5
    
    Scanning [-] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 5
    Scanning [\] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 6
    Scanning [|] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 6
    Scanning [/] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 7
    Scanning [-] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 7
    
    Scanning [\] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 8
    
    Scanning [|] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 8
    
    Scanning [/] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 9
    
    Scanning [-] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 9
    
    Scanning [\] Tracking: 1 Using: 1 Unhealthy: 0
    Seconds since last fix 10
    
    

  • Hi Miro,

    Please try to use the "Molex helix GNNS antenna" connected to the nRF9160DK and set the switch to the correct position.

    (so not the internal antenna)

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