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[Oblivian]

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

[stargate]

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.

[Oblivian]

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/comments/3or4et/linux_takes_hold_of_usb_rtl_device/

[stargate]

You need to watch the feeder in visual output like I describe earlier.

Stop fr24feed service
Stop all dump1090

run

sudo fr24feed

And look for the error.

Well, I found an ERROR: rmmod: ERROR: Module dvb_usb_rtl28xxu is not currently loaded

Should I try the following steps?

Problem:

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

Kernel driver is active, or device is claimed by second instance
In the first case, please either detach or blacklist the kernel
(dvb_usb_rtl28xxu), or enable automatic detaching at compile tim

usb_claim_interface error -6
Error opening the RTLSDR device: Device or resource busy

I solved the problem! Here is how:

First I checked the blacklist file for rtl-sdr.
I did NOT find find the file rtl-sdr-blacklist.conf in the directory /etc/modprobe.d

I was in GUI, and tried to create this file, but it refused to create.
I then opened console and typed this command:

sudo leafpad /etc/modprobe.d/rtl-sdr-blacklist.conf, and the file was created.

I then opened the newly created blank file and typed in the file:

blacklist dvb_usb_rtl28xxu
blacklist e4000
blacklist rtl2832

Then saved the file, rebooted, and gave command

cd dump1090
./dump1090 --interactive

and bingo, the dump1090 started working. Showing lots of plane with whip which came with DVB-T USB Stick!

[ATTACH=CONFIG]5453[/ATTACH]


Edit:
(1) Leafpad command creates file only when given to RPi console directly. It does not create file in SSH mode. In SSH mode, new file can be created by nano command i.e sudo nano /etc/modprobe.d/rtl-sdr-blacklist.conf.
(2) It is not necessary to use name rtl-sdr-blacklist.conf. Any name can be used, but the extension should always be .conf
(3) To see the plane plotted on google map, following command is to be given:

cd dump1090
./dump1090 --interactive --net --net-http-port 8080

This will open port 8080 on RPi, and then typing http://127.0.0.1:8080 in browser will display planes plotted on Google map

[Oblivian]

You need to watch the feeder in visual output like I describe earlier.

Stop fr24feed service
Stop all dump1090

run

sudo fr24feed

And look for the error.

[stargate]

So is it back to working now, or not?

Going by the searching I can see you making I'm guessing not.

If you installed or are running ANY other tracking site feed software on the same device. You probably have one configured wrong, and both trying to connect to the USB stick twice.

There should only ever be 1 running dump1090 version.

And everything else connecting using local network tcp beast:30005

Hi Oblivian,
I'm only running fr24 feed.

On win10 rtl-test shows:
Using device 0: Terratec T Stick PLUS
Found Elonics E4000 tuner
Supported gain values (14): -1.0 1.5 4.0 6.5 9.0 11.5 14.0 16.5 19.0 21.5 24.0 29.0 34.0 42.0
Reading samples in async mode...
lost at least 32 bytes

On Pi rtl-test shows:
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Terratec T Stick PLUS
Found Elonics E4000 tuner
Supported gain values (14): -1.0 1.5 4.0 6.5 9.0 11.5 14.0 16.5 19.0 21.5 24.0 29.0 34.0 42.0
Sampling at 2048000 S/s.
Benchmarking E4000 PLL...
[E4K] PLL not locked for 52000000 Hz!
[E4K] PLL not locked for 2221000000 Hz!
[E4K] PLL not locked for 1111000000 Hz!
[E4K] PLL not locked for 1276000000 Hz!
E4K range: 53 to 2220 MHz
E4K L-band gap: 1111 to 1276 MHz

When runs sudo fr24feed-status, it shows:
[FAIL] FR24 Feeder/Decoder Process ... failed!

I'm not sure what to do next? Reinstall hte Pi24 img? Try another dongle?

thanks.

[Oblivian]

So is it back to working now, or not?

Going by the searching I can see you making I'm guessing not.

If you installed or are running ANY other tracking site feed software on the same device. You probably have one configured wrong, and both trying to connect to the USB stick twice.

There should only ever be 1 running dump1090 version.

And everything else connecting using local network tcp beast:30005

[stargate]

The answer is also in that, and my threads

https://forum.flightradar24.com/thre...l=1#post104229

I just saw it. And I edit my former reply. thx

[Oblivian]

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.

The answer is also in that, and my threads

https://forum.flightradar24.com/threads/11571-Is-My-DVB-T-RTL-SDR-Dongle-Healthy?p=104229&viewfull=1#post104229

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

Kernel driver is active, or device is claimed by second instance of librtlsdr.
In the first case, please either detach or blacklist the kernel module
(dvb_usb_rtl28xxu), or enable automatic detaching at compile time.

usb_claim_interface error -6
Error opening the RTLSDR device: Device or resource busy
USB device already locked/in use or blacklisted
- Follow RPi RTL blacklist How-to guide here
- Close other instances of Dump1090 (clean reboot)
- Configure other software for Network data (remove exclusive USB need)

[stargate]

Check this thread:

https://forum.flightradar24.com/thre...Dongle-Healthy

thanks, I will have a try.

[Oblivian]

You can shortcut by manual use of quotes. Or just <name>: instead.

quote=widehopf]. /quote =

.

Be a different story if the software actually supported tagging alert notifications and was helpful. But it doesn't.
Just lets users post adverts (and has caught!) for iphones, fake passports and visas with contact email addresses attached. (which I believe is in the antispam addon they have implemented)

[wiedehopf]

Yeah yeah i got the memo by now. Sorry for being a bit slow. Didn't realize people would answer the same way and that would create a problem.

After all it's not a problem for established members to use the @ symbol.
It's much easier though than quoting someone and and then deleting most of it so it's not too long.

[Oblivian]

Check this thread:

https://forum.flightradar24.com/thre...Dongle-Healthy

And even April last year I warned about use of @s..

[wiedehopf]

Check this thread:

https://forum.flightradar24.com/threads/11571-Is-My-DVB-T-RTL-SDR-Dongle-Healthy

[Oblivian]

I refer again to my help page

https://forum.flightradar24.com/threads/9866-FR24feed-uploader-Additional-Info?p=74834&viewfull=1#post74834

- Check the basic commands

sudo systemctl stop fr24feed

sudo systemctl start fr24feed

Still not starting or MLAT or other functions are not working? Visually check WHY..
- Stop FR24feed

sudo systemctl stop fr24feed
- Start fr24feed with full output
sudo fr24feed ( !! no 'Service' !! )