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Why is this not working at all?

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  • #16
    Hello, I am sorry to open this again but I thought it would be better than to start yet another thread.

    I installed my antenna above the roofline of my house this morning and, in an effort to solve the graphs data issue I mentioned elsewhere, I bought a Sandisk Extreme SD card and decided to start again. I have:

    Installed FR24feed and configured it
    Installed tar1090
    Installed graphs1090
    Enabled bias-tee with Wiedehopf's script

    I am receiving zero air traffic.

    I have attempted to install readsb but get the following output:

    api.c: In function ‘send400’:
    api.c:228:5: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
    write(fd, buf, strlen(buf));
    cc1: all warnings being treated as errors
    make[2]: *** [Makefile:88: api.o] Error 1
    make[2]: *** Waiting for unfinished jobs....
    make[2]: Leaving directory '/usr/local/share/adsb-wiki/readsb-install/git'
    make[1]: *** [debian/rules:39: override_dh_auto_build] Error 2
    make[1]: Leaving directory '/usr/local/share/adsb-wiki/readsb-install/git'
    make: *** [debian/rules:54: build] Error 2
    dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
    Something went wrong building the debian package, exiting!
    And fr24feed-status returns this:

    pi@raspberrypi:~ $ fr24feed-status
    [ ok ] FR24 Feeder/Decoder Process: running.
    [ ok ] FR24 Stats Timestamp: 2021-03-29 14:15:26.
    [ ok ] FR24 Link: connected [UDP].
    [ ok ] FR24 Radar: T-EGGP193.
    [ ok ] FR24 Tracked AC: 0.
    [ ok ] Receiver: connected (0 MSGS/0 SYNC).
    [FAIL] FR24 MLAT: not running ... failed!
    I thought I had followed all steps to the letter like last time when I had some issues and was helped through it. Have I gone wrong somewhere?


    • #17
      Also this looks right to me:

      pi@raspberrypi:~ $ rtl_test -t
      Found 1 device(s):
      0: Realtek, RTL2838UHIDIR, SN: 00000001
      Using device 0: Generic RTL2832U OEM
      Found Rafael Micro R820T tuner
      Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
      [R82XX] PLL not locked!
      Sampling at 2048000 S/s.
      No E4000 tuner found, aborting.


      • #18
        The error in readsb was fixed, install should work now.


        • #19
          It's working, thank you! I was absolutely stumped


          • #20
            You might need to reinstall the autogain / graphs1090 now that readsb is installed.


            • #21
              Looks like it's working fine now, graphs1090 and all. And with the antenna finally outdoors on a mast, I am hitting over 200nm regularly and a big increase of tracked aircraft.

              Thanks very much for your help.


              • #22
                Although it is too late to tell this methos as colinLPL has already replace Pi24's dump1090-mutability by readsb, but just to complete records, and for information of Oblivian and others, on April 23, 2018, I have posted method to enable bias tee on Pi24 image with dump1090-mutabilityin following post of FR24 forum:

                INITIAL TEST
                https ://

                FINAL HOW-TO
                https ://

                Last edited by abcd567; 2021-03-30, 05:31.