Page 27 of 122 FirstFirst ... 1725262728293777 ... LastLast
Results 261 to 270 of 1219

Thread: Raspberry Pi type B + DVB-T Dongle to feed FR24

  1. #261
    Captain
    Join Date
    Jan 2012
    Location
    Dudley area, UK
    Posts
    1,410
    I wonder if it might be because your antenna just has no sensitivity at that low height?

    The nice thing about the low cost pi setup is it's not two expensive to put in a whole second rig behind an antenna set up for local use or an antenna on a yagi or behind a reflector

  2. #262
    Passenger
    Join Date
    Oct 2013
    Posts
    19
    Quote Originally Posted by peterhr View Post
    I wonder if it might be because your antenna just has no sensitivity at that low height?

    The nice thing about the low cost pi setup is it's not two expensive to put in a whole second rig behind an antenna set up for local use or an antenna on a yagi or behind a reflector
    Performance has improved, indeed. It's pretty consistent with FlightRadar's F-SBFI1 receiver. I managed to have a positive identification of planes located over Posadas VOR which is located 240 km. to the southwest but it's way too early to have.

    I am considering moving the antenna some 5-6 ft up. I suspect that the Ku-band sat antenna dish may be shadowing the ADSB groundplane antenna on the NE direction:

    foto 1a.jpg


    Any insights will be very welcome.

    Regards

    Ricardo
    Brazil

  3. #263
    First officer
    Join Date
    Aug 2013
    Location
    Close to Kimberley, South Africa
    Posts
    268
    Interesting bit of "useless" info....
    Since the RasPi does not have cooling fans, it can very well get a bit warm. If you want to monitor at what temperature your RasPi is running:

    watch /opt/vc/bin/vcgencmd measure_temp


    And it will show the current temperature:
    Every 2.0s: /opt/vc/bin/vcgencmd measure_temp Mon Nov 11 11:14:23 2013

    temp=30.4'C

    Mine is in a little homemade box, with 2 fans, hense a nice and low temp. Its ambient 32.6Celsius now

  4. #264
    Passenger
    Join Date
    Oct 2013
    Posts
    19
    Quote Originally Posted by HermanZA View Post
    Interesting bit of "useless" info....
    Since the RasPi does not have cooling fans, it can very well get a bit warm. If you want to monitor at what temperature your RasPi is running:

    watch /opt/vc/bin/vcgencmd measure_temp

    And it will show the current temperature:
    Every 2.0s: /opt/vc/bin/vcgencmd measure_temp Mon Nov 11 11:14:23 2013

    temp=30.4'C

    Mine is in a little homemade box, with 2 fans, hense a nice and low temp. Its ambient 32.6Celsius now


    This may be helpful for troubleshooting. Mine is enclosed in an acrylic case, with heatsinks with no forced air cooling - so far. Local temperature is 30' C and it's istill 09:45 AM (daylight saving time). I'll salvage a tiny fan from an old AGP video card and install it right over the SDRAM heatsink, since the SoC is located beneath it.

    I am impressed with the overall performance of my setup. With that simple groundplane antenna, a R820T stick and RPi I am feeding as T-SBFI2.

    Ricardo
    Brazil

  5. #265
    Passenger
    Join Date
    Nov 2013
    Posts
    8
    I want to thank Peter for his fantastic Rasppbery Pi tutorial. One newby question: How can you check that my stick/antenna is feeding data to Flightradar24?

    Thanks!

  6. #266
    Purser
    Join Date
    Jan 2013
    Location
    Wellington F-NZWN1, T-NZWN2, T-NZWN5
    Posts
    158
    Log on to FR24 and your latest activity is in there under your account info :-)

    sent from my phone that isn't an i anything!

  7. #267
    First officer
    Join Date
    Aug 2013
    Location
    Close to Kimberley, South Africa
    Posts
    268
    41South is correct, if you are logged in as Premium user, your account will show you Last Activity.

    On the PI you can run the following command:
    tail -f /tmp/fr24feed.log Ctrl+C to stop the output.

    It will show you interesting output like:
    [n]your-site-code@83.140.247.21:8099/UDP
    [n]connecting
    [n]connected
    [n]switching to UDP
    [n]working
    [n]pinging the server
    [i]sent 4 planes in 1 packets
    [i]sent 4 planes in 1 packets
    [i]sent 3 planes in 1 packets
    [i]sent 4 planes in 1 packets

    .... when you see that, you are sending data. You might only PING the servers every few minutes, if you don't have any planes to upload.

    But Peter might have a easier/better plan.
    Last edited by HermanZA; 2013-11-18 at 23:52.

  8. #268
    Captain
    Join Date
    Jan 2012
    Location
    Dudley area, UK
    Posts
    1,410
    Welcome aboard Laserboy, where about in the world are you (nearest city)

    Quote Originally Posted by Laserboy View Post
    I want to thank Peter for his fantastic Raspberry Pi tutorial.
    You're very welcome

    Quote Originally Posted by Laserboy View Post
    One newby question: How can you check that my stick/antenna is feeding data to Flightradar24?
    I'd check the log as suggested by Herman, If you see 'your' planes with someone else's radar - particularly an F- Radar - on the FR24.com map, it's probably because they have a receiver that processes the data faster than yours does. For me this means my radar rarely is shown but if you are in an area that is unserviced you will make a big difference and it'll be time to start experimenting building antennas.
    Last edited by peterhr; 2013-11-19 at 07:11.

  9. #269
    Passenger
    Join Date
    Nov 2013
    Posts
    8
    Thanks for the warm welcome and the answers . I appreciate that and it works. I live in a relatively busy flying area. As the crow flies, its 33 miles East Southeast from Schiphol Airport, Amsterdam. My radar code is T-EHSB36, nearest airport is a former military airfield Soesterberg. At the moment I'm experimenting with the RTL Dongle from the window (low range). I have the antenna short time placed at the roof window. Immediately I saw a noticeable difference in the range of the number of aircrafts . Also, my data actually used by Flightradar24-map. This place, at the windows roof is currently no suitable place for some reasons.

    I am a loyal user of Flightradar24. I have for some time a second Raspberry Pi which I rarely use . So I hope I can contribute, it is so easy when its works. For Longer-term hopefully with a better range. At the moment the Raspberry Pi is connected to the Internet by a WiFi Dongle (I am aware of possible delays with WiFi). But i working on it.

    I'm subscribed to this thread, so I can follow your comments about your expertise in the future. ;-)

  10. #270
    Purser attigliano's Avatar
    Join Date
    May 2010
    Location
    Copenhagen
    Posts
    116
    How do I make a coverage map from my Raspberry Pi + DVB-T Dongle?
    I have seen some pics where adsbscope was used.
    Installed adsbscope on my PC but it can't accept data from outside the PC?

    Thanks

    Poul
    T-EKCH5: Raspberry Pi type B+ + FlightAware Pro Stick Plus + 1090MHz Bandpass Filter + A3-ADS-B Antenna

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •