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Online - No Data after moving my setup

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  • wiedehopf
    replied
    Cardboard won't block the electromagnetic waves from the tower, for that you need metal!

    So if you have some old sheet of metal lying around, you can use that as well.
    Should be as high as the antenna, and maybe half a meter wide.

    Then try to position it in the right spot between antenna and mobile tower.
    If it's half a meter wide, maybe put it 1.5 m away initially to see if it works.
    (will block a good part of the sky)
    I'm not sure how well it will work, but then you can move it further away to block only the tower.

    With a narrower piece of w/e you will need to put it closer to the antenna obviously.
    Think of the tower as shining light, and the antenna needs to be in the shadow.

    Leave a comment:


  • sbnf
    replied
    thanks for the tip.
    I tought it was one or another!

    Leave a comment:


  • wiedehopf
    replied
    Don't forget the aluminium foil on the cardboard
    Cardboard alone won't help :P

    Good luck!

    Leave a comment:


  • sbnf
    replied
    Seems to be back on track.
    frworkingagain.jpg

    still no hits, but should update soon. Low traffic in the area this time.

    Ill take a look at your past messages and the links for the filter for buying next month

    thanks a lot
    God bless you

    Willian
    Brazil

    Leave a comment:


  • wiedehopf
    replied
    Check the config again please:

    cat /etc/fr24feed.ini

    Should no longer say dvbt for receiver.

    Leave a comment:


  • sbnf
    replied
    I ran it.
    As sayd, im kind of a newbie with this thing, but I think Im running both 1090-fa and the fr24feed that was previously installed.
    Does it make sense?
    will try again

    Leave a comment:


  • wiedehopf
    replied
    Didn't you run https://github.com/wiedehopf/adsb-sc...for-dump1090fa ?
    That should have changed the configuration.

    No matter you can adjust the configuration as explained here:
    https://github.com/wiedehopf/adsb-wi...ng-dump1090-fa

    receiver needs to be set to "beast-tcp"
    the rest of the config looks fine.

    Leave a comment:


  • sbnf
    replied
    pi@raspberrypi:~ $ cat /etc/fr24feed.ini
    receiver="dvbt"
    fr24key=""
    host="127.0.0.1:30005"
    path="/usr/lib/fr24/dump1090"
    bs="no"
    raw="no"
    logmode="2"
    windowmode="0"
    logpath="/var/log/fr24feed"
    mpx="no"
    mlat="yes"
    mlat-without-gps="yes"

    Leave a comment:


  • wiedehopf
    replied
    sure, let's check your configuration:

    cat /etc/fr24feed.ini

    It should look like this:
    Code:
    receiver="beast-tcp"
    fr24key="xxxxxxxxxxxxxxxx"
    host="127.0.0.1:30005"
    bs="no"
    raw="no"

    Leave a comment:


  • sbnf
    replied
    Thanks a lot for helping wiedehopf.
    On attic I have a problem with some brickwall from water tank. Its bloking some NE direction.
    Will try the cardboard on cell antenna direction.

    Actually, I think i will just need to cut my cable and replace connectors.
    If I connect the filter right on the dongle it will be easier and Ill not need another cable.

    About FR, anything we can do?
    nodata.jpg

    Leave a comment:


  • wiedehopf
    replied
    Inside the roof, place a metal sheet in the direction of the mobile phone tower.
    Aluminium foil on cardboard will also do

    It should improve your overall reception but block that part of the sky.

    Interference if too strong, will reduce reception in all directions, not just the direction where the interference is coming from.
    Imagine something being so loud that everything gets distorted.


    The dual 978+1090 MHz isn't always useful in regards to mobile phone frequencies, as 978 MHz is too close to them.
    You shouldn't need other cables for that though.
    And even for the ones i linked on ebay, one of them is only 6$, you only need a SMA male to male adapter.
    Likely the ebay filters are better suited than the light blue FA filter in this case.

    Anyway you should be able to block the mobile phone antenna with cardboard/aluminium foil or another metal sheet pretty well.
    The attic seems like it should give you good reception
    Last edited by wiedehopf; 2019-10-04, 14:19.

    Leave a comment:


  • sbnf
    replied
    changed the graph to last hour, it dropped to 5.1%

    Leave a comment:


  • sbnf
    replied
    im considering this filter on amazon
    ADS-B Dual 978 MHz + 1090 MHz Band-Pass SMA Filter from Flight Aware.
    My budget is kinda low as I had to buy the PI, 40bucks antenna, dongle and stuf.
    As Im in Brazil, everything now is multiplied by 4,2
    Also will need to buy some other connectors and a smaller cable to fit everything.
    I think I will let it running with the antenna inside the roof by now and maybe in two months Ill try the roof outside again with filter.

    Leave a comment:


  • sbnf
    replied
    you mean this one?
    31,3
    dump1090-localhost-local_trailing_rate-24h.png

    Leave a comment:


  • wiedehopf
    replied
    The first graph has a number: Percent of messages >-3dBFS
    That percentage is larger with more gain.
    Usually i adjust this to 1% to 5%, if you are close to an airport, 10% can be a good value as well.

    Or just do what gives you better message rate on the graphs, but note that you'll have fluctuation, so the gain change may not be the reason for the change.

    Leave a comment:

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