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Thread: Raspberry Pi 3 B+ and USB Dongle R820T2 no flights recognized

  1. #1
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    Raspberry Pi 3 B+ and USB Dongle R820T2 no flights recognized

    Good morning,

    I tried to build my own Flightradar24 receiver. I am using the above mentioned hardware and the image provided by Flightradar24. Bildschirmfoto 2019-04-10 um 06.34.22.jpg As far as I understood the manual it should work out of the box. Do you have any suggestions what's the reason for my issue?

    Best
    Christian

  2. #2
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    What antenna are you using, how is it connected?

    It looks like you are just not receiving any flights, that can have a number of reasons:

    - Antenna not connected, connection faulty
    - Really bad antenna
    - Electrical noise blocking reception
    - No planes in range
    - Bad antenna position

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    I am using a USB Dongle with antenna from jetvision.

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    It seems there is something wrong with my installation.

    I gett error messages if I try to install sudo apt-get install rtl-sdr

  6. #6
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    Quote Originally Posted by Nomax2000 View Post
    I am using a USB Dongle with antenna from jetvision.
    They have multiple antennas and multiple dongles, please be specific.

    Anyway follow the guide linked above by abcd567 to first check if the dongle is working correctly.

    Edit: Well if you want any helpful input on the problem, why don't you tell us which errors?
    Last edited by wiedehopf; 2019-04-10 at 14:41.

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    Sorry. I would like to. But this forum isn't allowing me to post links. Thus I can't write the error yet.

    It is the bundle: ADS-B USB Dongle (R820T2) + Small Indoor Antenna

    ADS-B RTL2832/R820T USB-Dongle
    Indoor Antenna

    pi@raspberrypi:~ $ sudo apt-get install rtl-sdr
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    The following NEW packages will be installed:
    rtl-sdr
    0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
    Need to get 51.7 kB of archives.
    After this operation, 172 kB of additional disk space will be used.
    Err:1 http://archive.raspberrypi.org/debian stretch/main armhf rtl-sdr armhf 0.5.3-11+rpt1
    Could not open file /var/cache/apt/archives/partial/rtl-sdr_0.5.3-11+rpt1_armhf.deb - open (30: Read-only file system) [IP: 93.93.128.211 80]
    W: Not using locking for read only lock file /var/lib/dpkg/lock
    W: chown to _apt:root of directory /var/cache/apt/archives/partial failed - SetupAPTPartialDirectory (30: Read-only file system)
    W: chmod 0700 of directory /var/cache/apt/archives/partial failed - SetupAPTPartialDirectory (30: Read-only file system)
    W: Not using locking for read only lock file /var/cache/apt/archives/lock
    W: Problem unlinking the file /var/cache/apt/archives/partial/.apt-acquire-privs-test.YAGcKX - IsAccessibleBySandboxUser (30: Read-only file system)
    W: Problem unlinking the file /var/cache/apt/archives/partial/rtl-sdr_0.5.3-11+rpt1_armhf.deb - PrepareFiles (30: Read-only file system)
    E: Failed to fetch http://archive.raspberrypi.org/debia...rpt1_armhf.deb Could not open file /var/cache/apt/archives/partial/rtl-sdr_0.5.3-11+rpt1_armhf.deb - open (30: Read-only file system) [IP: 93.93.128.211 80]
    E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
    Last edited by Nomax2000; 2019-04-10 at 15:00.

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    pi@raspberrypi:~ $ sudo apt-get install rtl-sdr
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    The following NEW packages will be installed:
    rtl-sdr
    0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
    Need to get 51.7 kB of archives.
    After this operation, 172 kB of additional disk space will be used.
    Err:1 archive.raspberrypi.org/debian stretch/main armhf rtl-sdr armhf 0.5.3-11+rpt1
    Could not open file /var/cache/apt/archives/partial/rtl-sdr_0.5.3-11+rpt1_armhf.deb - open (30: Read-only file system) [IP: 93.93.128.211 80]
    W: Not using locking for read only lock file /var/lib/dpkg/lock
    W: chown to _apt:root of directory /var/cache/apt/archives/partial failed - SetupAPTPartialDirectory (30: Read-only file system)
    W: chmod 0700 of directory /var/cache/apt/archives/partial failed - SetupAPTPartialDirectory (30: Read-only file system)
    W: Not using locking for read only lock file /var/cache/apt/archives/lock
    W: Problem unlinking the file /var/cache/apt/archives/partial/.apt-acquire-privs-test.YAGcKX - IsAccessibleBySandboxUser (30: Read-only file system)
    W: Problem unlinking the file /var/cache/apt/archives/partial/rtl-sdr_0.5.3-11+rpt1_armhf.deb - PrepareFiles (30: Read-only file system)
    E: Failed to fetch .raspberrypi.org/debian/pool/main/r/rtl-sdr/rtl-sdr_0.5.3-11+rpt1_armhf.deb Could not open file /var/cache/apt/archives/partial/rtl-sdr_0.5.3-11+rpt1_armhf.deb - open (30: Read-only file system) [IP: 93.93.128.211 80]
    E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

  9. #9
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    Use this command, then start with the commands in the other thread again:
    Code:
    sudo mount -o remount ,rw /
    (I'm still not sure when the pi24 sd-card image is mounted readonly. Did you just download it?)

  10. #10
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    Quote Originally Posted by Nomax2000 View Post
    It is the bundle: ADS-B USB Dongle (R820T2) + Small Indoor Antenna
    Please check this thread on improving this antenna (it has bad reception because it's for other frequencies)

    https://forum.flightradar24.com/thre...h-DVB-T-Dongle


    Also make sure that you place it higher than the Raspberry Pi and not too close to it, the RPi and it's power source cause electrical noise that couples into the antenna causing bad reception.

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