Raspberry Pi 2 problem


Hi to all
I have two Raspberry Pi 2s that feed data, site two only feeds to FlightAware and I have no problem with it.

Site 1 feeds to four sites, but from time to time drops the connection to all the sites.

Even though the connection is down, I can connect to the Pi with VNC but not with the web interface.

I have changed the power supply to a genuine Pi one, also changed the wifi dongle but the problem persists!

Advice would be welcome


If it’s a wifi connection, please look here
==> http://weworkweplay.com/play/rebooting-the-raspberry-pi-when-it-loses-wireless-connection-wifi/


If you can connect using VNC, that means WiFi is working.
If you fail to debug, and it is NOT a hardware issue, then ultimate solution is re-imaging your microSD card. Painful to think of, not so difficult to do.


If you can connect on VPN, most likely you can SSH also.

  1. SSH and test you Dongle.
    #First install test tool package
    sudo apt-get update
    sudo apt-get install rtl-sdr

    # Stop dump1090 by one of the following command 
    #depending on which version you have installed
    sudo systemctl stop dump1090-fa
    sudo systemctl stop dump1090-mutability

    #Now run the test
    rtl_test -t

   #If the Dongle is healthy, you will see following output
    Found 1 device(s):
      0:  Realtek, RTL2832U, SN: 00001000

    Using device 0: Generic RTL2832U
   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
    Sampling at 2048000 S/s.
    No E4000 tuner found, aborting.

    #Now reboot to restore system
    sudo reboot


  1. If the above test fails, unplug, then replug the Dongle, then reboot the Pi