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  • abcd567
    replied
    stargate:
    Spider antenna built on the dongle

    Leave a comment:


  • wiedehopf
    replied
    Doesn't it have a small hole in the middle? That's where an appropriately sized wire should go in.

    Then the radials should go where the outer shield contact normally goes in.

    I'm not sure how well that will work with that connector, you'll have to use your own judgement

    Leave a comment:


  • stargate
    replied
    Originally posted by wiedehopf View Post
    Consider shielding the dongle with some aluminium foil without shorting anything.

    And place the antenna higher than the pi so it is not in the horizontal plane of the antenna.
    Best to make sure all the cable you have is used so the RPi is as far as possible from the antenna.

    It is possible that the delivered antenna lost cable connection at the base, the connection is very flimsy.

    Depending on the dongle you can put a wire or paper clip directly into the connector. (about 67 mm long)

    Do you have a dongle with SMA connector or MCX connector?
    Hi wiedehopf,

    Could you specify how to put a wire or paper into the connector, like a picture?
    Thanks.

    Leave a comment:


  • wiedehopf
    replied
    Even easier to put a wire in that connector i suppose

    You could probably also somehow make some radials (wires of about equal length to the antenna wire connected to the outer/shielding connection)

    Basically you want a construction like this: https://forum.flightradar24.com/thre...g-No-Connector

    If you have a coax cable available that fits your connector, building the antenna above will provide the best reception you can easily get with a self built antenna

    Leave a comment:


  • stargate
    replied
    Originally posted by wiedehopf View Post
    Consider shielding the dongle with some aluminium foil without shorting anything.

    And place the antenna higher than the pi so it is not in the horizontal plane of the antenna.
    Best to make sure all the cable you have is used so the RPi is as far as possible from the antenna.

    It is possible that the delivered antenna lost cable connection at the base, the connection is very flimsy.

    Depending on the dongle you can put a wire or paper clip directly into the connector. (about 67 mm long)

    Do you have a dongle with SMA connector or MCX connector?
    The dongle is an E4000 type.
    The connector is attached below.
    connector.jpg

    Leave a comment:


  • wiedehopf
    replied
    Consider shielding the dongle with some aluminium foil without shorting anything.

    And place the antenna higher than the pi so it is not in the horizontal plane of the antenna.
    Best to make sure all the cable you have is used so the RPi is as far as possible from the antenna.

    It is possible that the delivered antenna lost cable connection at the base, the connection is very flimsy.

    Depending on the dongle you can put a wire or paper clip directly into the connector. (about 67 mm long)

    Do you have a dongle with SMA connector or MCX connector?

    Leave a comment:


  • stargate
    replied
    Originally posted by Oblivian View Post
    Make a new one using the base, or trim it to the right length. They are not optimized for ADSB which is near microwave.

    https://forum.flightradar24.com/thre...ll=1#post64157
    Thanks for the advice. However, I can only put the antenna in the closed balcony, covering half the sky at most.

    Maybe I will consider DIY a better antenna in the future.

    Leave a comment:


  • Oblivian
    replied
    Make a new one using the base, or trim it to the right length. They are not optimized for ADSB which is near microwave.

    https://forum.flightradar24.com/thre...ll=1#post64157

    Leave a comment:


  • stargate
    replied
    Originally posted by Oblivian View Post
    I was thinking that when you only had 3 contacts and 0nm from the onset. But needed to ensure it actually started up normally first.

    My next question (it was 2am my time last reply) was is it a modified antenna or the factory one.

    Sent from my EML-L09 using Tapatalk
    Hi Oblivian,

    You sleep too late.

    The antenna is a factory one coming with the dongle.

    The day before yesterday it worked fine, which was the first time I setup the Pi24.

    And I changed the antenna place just before I went to sleep.

    Yesterday morning, I found there is no data uploaded. I didn't even think about the antenna issue.

    Now I know better about the logs.

    Leave a comment:


  • Oblivian
    replied
    I was thinking that when you only had 3 contacts and 0nm from the onset. But needed to ensure it actually started up normally first.

    My next question (it was 2am my time last reply) was is it a modified antenna or the factory one.

    Sent from my EML-L09 using Tapatalk

    Leave a comment:


  • stargate
    replied
    Originally posted by wiedehopf View Post
    Either the dongle pretends to be working fine but actually isn't or your antenna is somehow no longer connected.

    At least that's my interpretation.

    I suppose it could also be that the dongle is receiving insufficient voltage and immediately wedges.

    So you could try a new dongle or a new powersupply.
    (Or connect the dongle via a powered USB hub)

    Or as i said the antenna cable could be broken.
    Yes. it's the antenna problem. It's all OK when I put it in another place.
    But it's very strange that I think the former place would have a better signal.

    @Oblivian thanks for the help. I learned much about how the Pi24 works via our discuss.

    Leave a comment:


  • wiedehopf
    replied
    Either the dongle pretends to be working fine but actually isn't or your antenna is somehow no longer connected.

    At least that's my interpretation.

    I suppose it could also be that the dongle is receiving insufficient voltage and immediately wedges.

    So you could try a new dongle or a new powersupply.
    (Or connect the dongle via a powered USB hub)

    Or as i said the antenna cable could be broken.

    Leave a comment:


  • stargate
    replied
    Originally posted by Oblivian View Post
    if "ERROR: rmmod: ERROR: Module dvb_usb_rtl28xxu is not currently loaded" is seen on the fr24 screen during start

    Keep watching and Post more of the logs.
    As other users have seen that and it runs fine. It is good that the module isn't loaded. So probably not an 'error' as that is exactly what it is trying to do

    removeModule

    You are focusing on single bits, not providing the whole picture. 1st the server message, when it was fine, not an error. And then this. But you also pasted it was working fine but already in use/locked.




    Just remember, if you don't stop the service. It is always running. But you can't see errors - And then running 'fr24feed <anything> restarts it again on top
    I tried again, and post the logs below.

    pi@raspberrypi:~ $ sudo service fr24feed stop
    pi@raspberrypi:~ $ sudo systemctl stop fr24feed
    pi@raspberrypi:~ $ sudo systemctl stop dump1090-mutability //only this one
    pi@raspberrypi:~ $ sudo fr24feed
    2019-05-11 13:39:39 | [main][i]FR24 Feeder/Decoder
    2019-05-11 13:39:39 | [main][i]Version: 1.0.23-8/generic
    2019-05-11 13:39:39 | [main][i]Built on Oct 11 2018 18:27:28 (HEAD-3c696a7.git/Linux/static_armel)
    2019-05-11 13:39:39 | [main][i]Running on: pi24-raspbian9
    2019-05-11 13:39:39 | [main][i]Local IP(s): 192.168.1.158
    2019-05-11 13:39:39 | [main][i]Copyright 2012-2018 Flightradar24 AB
    2019-05-11 13:39:39 | [main][i]https://www.flightradar24.com
    2019-05-11 13:39:39 | [main][i]DNS mode: PING
    2019-05-11 13:39:39 | [main][i]Automatic updates are ENABLED
    2019-05-11 13:39:39 | ERROR: rmmod: ERROR: Module dvb_usb_rtl28xxu is not currently loaded
    2019-05-11 13:39:39 | [httpd][i]Server started, listening on 0.0.0.0:8754
    2019-05-11 13:39:39 | [main][i]Reader thread started
    2019-05-11 13:39:39 | [reader][i]Initializing reader
    2019-05-11 13:39:39 | [main][i]Socket server started
    2019-05-11 13:39:39 | [reader][i]Connecting to DVBT receiver via (exe:///usr/bin/dump1090-mutability --raw --mlat)
    2019-05-11 13:39:39 | [main][i]MLAT data feed started
    2019-05-11 13:39:39 | [master][i]Starting processing thread
    2019-05-11 13:39:39 | [bs][i]Initializing server
    2019-05-11 13:39:39 | [reader][i]Connected to the receiver, configuring
    2019-05-11 13:39:39 | [reader][i]Configured, processing messages
    2019-05-11 13:39:39 | [bs][i]Starting server on 0.0.0.0:30003
    2019-05-11 13:39:39 | [mlat][i]Waiting for MLAT configuration
    Sat May 11 13:39:39 2019 UTC dump1090-mutability v1.14 starting up.
    Found 1 device(s):
    0: Realtek, RTL2838UHIDIR, SN: 00000001 (currently selected)
    Found Elonics E4000 tuner
    Max available gain is: 42.00 dB
    Setting gain to: 42.00 dB
    Exact sample rate is: 2000000.052982 Hz
    Gain reported by device: 42.00 dB
    2019-05-11 13:39:40 | [time][i]Synchronizing time via NTP
    2019-05-11 13:40:17 | [time][i]Time synchronized correctly, offset -0.0028 seconds
    2019-05-11 13:40:17 | [feed][i]Downloading configuration
    2019-05-11 13:40:17 | [main][i]Feed Network client started
    2019-05-11 13:40:17 | [main][i]RAW data server started
    2019-05-11 13:40:17 | [raw][i]Initializing server
    2019-05-11 13:40:17 | [raw][i]Starting server on 0.0.0.0:30002
    2019-05-11 13:40:17 | [feed][d]fetching configuration
    2019-05-11 13:40:21 | [feed][i]configuring decoder
    2019-05-11 13:40:21 | [feed][c]Max range AIR: 350.0nm
    2019-05-11 13:40:21 | [feed][c]Max range GND: 100.0nm
    2019-05-11 13:40:21 | [stats][i]Stats thread started
    2019-05-11 13:40:21 | [feed][i]configuration changed
    2019-05-11 13:40:21 | [feed][i]defined 3 servers
    2019-05-11 13:40:21 | [feed][c]Timestamps: optional
    2019-05-11 13:40:21 | [feed][n]ZBAA1@185.218.24.22:8099/UDP
    2019-05-11 13:40:21 | [feed][n]connecting
    2019-05-11 13:40:21 | info | Stopping ReceiverACSender threads for feed
    2019-05-11 13:40:21 | info | Configured ReceiverACSender: 185.218.24.22:8099,185.218.24.23:8099,185.218.24.2 4:8099, feed: ZBAA1, send_interval: 5s, max age: 15s, send metadata: true, mode: 1, filtering: true
    2019-05-11 13:40:21 | info | Network thread connecting to 185.218.24.22:8099 for feed ZBAA1
    2019-05-11 13:40:21 | [feed][n]connected via UDP (fd 17)
    2019-05-11 13:40:21 | [feed][i]Feed connected
    2019-05-11 13:40:21 | [feed][n]working
    2019-05-11 13:40:51 | [feed][n]ping 1
    2019-05-11 13:40:52 | [feed][n]syncing stream result: 1

    Leave a comment:


  • Oblivian
    replied
    if "ERROR: rmmod: ERROR: Module dvb_usb_rtl28xxu is not currently loaded" is seen on the fr24 screen during start

    Keep watching and Post more of the logs.
    As other users have seen that and it runs fine. It is good that the module isn't loaded. So probably not an 'error' as that is exactly what it is trying to do

    removeModule

    You are focusing on single bits, not providing the whole picture. 1st the server message, when it was fine, not an error. And then this. But you also pasted it was working fine but already in use/locked.

    Found 1 device(s):
    0: Realtek, RTL2838UHIDIR, SN: 00000001

    Using device 0: Terratec T Stick PLUS
    usb_claim_interface error -6
    Failed to open rtlsdr device #0.

    Well, what does the error mean?
    thanks.

    Just remember, if you don't stop the service. It is always running. But you can't see errors - And then running 'fr24feed <anything> restarts it again on top

    Leave a comment:


  • stargate
    replied
    Originally posted by Oblivian View Post
    If

    lsmod

    Shows 'dvb_usb_rtl28xxu'

    Then yes. It refers to the blacklist mentioned when no traffic is being uploaded.

    https://www.reddit.com/r/RTLSDR/comm...sb_rtl_device/

    I ran sudo nano /etc/modprobe.d/rtl-sdr-blacklist.conf, and added

    blacklist dvb_usb_rtl28xxu
    blacklist e4000
    blacklist rtl2832
    blacklist rtl2830
    blacklist r820t

    And reboot, but I still got that error.
    ERROR: rmmod: ERROR: Module dvb_usb_rtl28xxu is not currently loaded

    fr24feed-status:
    pi@raspberrypi:~ $ sudo fr24feed-status
    [ ok ] FR24 Feeder/Decoder Process: running.
    [ ok ] FR24 Stats Timestamp: 2019-05-11 13:13:32.
    [ ok ] FR24 Link: connected [UDP].
    [ ok ] FR24 Radar: T-ZBAA1.
    [ ok ] FR24 Tracked AC:.
    [ ok ] Receiver: connected (0 MSGS/0 SYNC).
    [FAIL] FR24 MLAT: not running ... failed!


    I wonder if I install a raspberry original img, what modules/soft should I install in a row?
    Could you give me a guide link?

    thanks.
    Last edited by stargate; 2019-05-11, 13:17.

    Leave a comment:

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