Hi Iain,

Pleased to hear it worked well for you. Thanks for taking the time to let me know.

Mike – G4WNC

Thanks for all this information, just set up and sdr server as per your instructions and it worked first time!

Keep doing all the good work

Hi Ferry,

Look carefully at my instructions; you have two errors in your script:
1 – The sleep 15 statement should be immediately after the line: #Print the IP address
2 – The line that runs the server (/usr/local/bin/rtl_tcp -a $_IP&) should be before the line containing fi
Here’s an example of how it should look:

# Print the IP address
sleep 15
_IP=$(hostname -I) || true
if [ “$_IP” ]; then
printf “My IP address is %s\n” “$_IP”
/usr/local/bin/rtl_tcp -a $_IP &
fi

exit 0

Running from the cmd line it works fine.
But running via rc.local I can’t connect.

#!/bin/sh -e
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will “exit 0” on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

# Print the IP address
_IP=$(hostname -I) || true
if [ “$_IP” ]; then
printf “My IP address is %s\n” “$_IP”
fi

sleep 15
/usr/local/bin/rtl_tcp -a $_IP &

exit 0

Any idea’s?

73, Ferry PD9FER

Ben,

The final message reports that it’s listening on 192.168.0.25, so it all looks fine. I suspect the problem is connected with how you’re accessing the dongle.

Here’s what you should be doing:

** Run SDR Sharp on another PC on the same local network.
** In the Sources box select RTL-SDR TCP
** Go to the cogs icon at the top and enter the Pi IP address in the host box (192.168.0.25)
** The Port box will probably already be set to 1234 but, if not, correct it
** Click the Play arrow at the top and the receiver should start
** It will probably be very deaf, so go to the cogs icon again and move the RF gain slider till you start hearing signals. Don’t push this too far or you’ll cause overload.

NB: Ideally the PC and the Pi should be using wired Ethernet unless you have a particularly good local WI-Fi system. The dongle needs to be able to send a 32Mb/s continuous data stream and few Wi-Fi systems can manage that reliably.

Hope that helps,

Regards,

Mike – G4WNC

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
Sampling at 2048000 S/s.
No E4000 tuner found, aborting.
pi@raspberrypi:~ $ rtl_tcp -a 192.168.0.25
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
Tuned to 100000000 Hz.
listening…
Use the device argument ‘rtl_tcp=192.168.0.25:1234’ in OsmoSDR (gr-osmosdr) source
to receive samples in GRC and control rtl_tcp parameters (frequency, gain, …).

Can’t get it to work still

Hi Ben,

I think you’ve now spotted that you missed the space in the cmake command. Spaces are difficult to show reliably as it depends how your browser renders the page and what size screen you’re using.
The message you’re getting from rtl_test -t is correct. The aborting message is normal. It occurs because the test program checks to see if your dongle uses an R820T or E4000 tuner. When it finds a tuner it reports the details and then aborts when the alternative tuner is not found. You should be all running now.

Regards,

Mike

Mine does the same

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
No E4000 tuner found, aborting

I ran RTL_test-t from the terminal session as per the guide.

My bad

cmake ../ -DINSTALL_UDEV_RULES=ON

should have been

cmake ../ -DINSTALL_UDEV_RULES=ON

cmake ../ -DINSTALL_UDEV_RULES=ON
bash: cmake../DINSTALL_UDEV_RULES=ON: No such file or directory

All previous steps were performed ok with no errors.