New here - Help please

[abcd567]

sudo apt-get install rtl-sdr

sudo systemctl stop fr24feed dump1090-mutability dump1090-fa

rtl_test -t

Post output of last command above.

[jchjch9]

pi@raspberrypi:~ $ rtl_test -t
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000000

Using device 0: Generic RTL2832U OEM
usb_claim_interface error -6
Failed to open rtlsdr device #0.
pi@raspberrypi:~ $

[abcd567]

usb_claim_interface error -6
Failed to open rtlsdr device #0.

Something is using the dongle. As the 2nd command I gave stopped fr24feed, dump1090-fa and dump1090-mutability, it looks you have readsb installed and running, which is using the dongle.

Give following two commands which will test the dongle after stopping readsb also

sudo systemctl stop fr24feed readsb dump1090-mutability dump1090-fa

rtl_test -t

Post output of last command above

[jchjch9]

pi@raspberrypi:~ $ rtl_test -t
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000000

Using device 0: Generic RTL2832U OEM
No supported tuner found
Enabled direct sampling mode, input 1
Supported gain values (1): 0.0
Sampling at 2048000 S/s.
No E4000 tuner found, aborting.

[Oblivian]

I noticed this in the earlier scripted tests. But wasn't sure/couldn't remember if it was normal

but there is your answer

No supported tuner found

[jchjch9]

Do you know what I have to buy ? Because i purchased it, because it was written on the FR24 built your own page ))))
Some advice please Brand and type ? Thanks

[abcd567]

Using device 0: Generic RTL2832U OEM
No supported tuner found
Enabled direct sampling mode, input 1
Supported gain values (1): 0.0

Your dongle is either wrong type or defective.
Purchase one with RTL2832U + R820T chips

The supported tuner is R820T. Dont purchase one which does not clearly specify both RTL2832U & R820T. Some specify FC0012 or FC0013 (Fitipower). Dont purchase these.

EDIT:
I see from your first post you have Nooelec dongle with RTL2832U & R820T.

If you have purchased directly from Nooelec, it is defective. Return it to them and ask for replacement.

If you have purchase from some other seller, he has either send you a fake, or send you a defective one. Return it to him and ask for refund.

[jchjch9]

Thanx! go shopping

[jchjch9]

Ok thanx a lot, yes i purchased it on amazon directly from Nooelec

[jchjch9]

Guys, thank you for your support, after the change everything works perfect. Thanx