Scan failed, no any interface to connect

[Hank]

Rencently, I got a crazyfllie 2.0 and it could find the interface of radio://0/80/250K to get the information of crazyflie on Ubuntu VM. unfortunately, it doesn't work today, there is no interface that i can get by scanning from the UI no matter something have been tested such as building on the windows, flashing the firmware of crazyflie and updating the crazyradio.
On the other hand, i found that the bootloader is still available through the crazyradio and the crazyflie could connected by our phone app, so i can't understand which part is wrong and how to fix it, does anyone have the idea? The following is the message showing in the terminal:


INFO:cfclient.gui:Disabling STL printouts
INFO:cfclient.utils.input.inputreaders:Input readers: ['linuxjsdev', 'pysdl2']
INFO:cfclient.utils.input.inputreaders:Successfully initialized [linuxjsdev]
INFO:cfclient.utils.input.inputreaders:Could not initialize [pysdl2]: No SDL2 support on Linux
INFO:cfclient.utils.input.inputinterfaces:Found interfaces: ['leapmotion', 'wiimote', 'zmqpull']
INFO:cfclient.utils.input.inputinterfaces:Could not initialize [leapmotion]: Leap Motion library probably not installed (No module named 'leapsdk')
INFO:cfclient.utils.input.inputinterfaces:Could not initialize [wiimote]: Missing cwiid (wiimote) driver No module named 'cwiid'
INFO:cfclient.utils.config:Dist config read from /home/bitcraze/projects/crazyflie-clients-python/src/cfclient/configs/config.json
INFO:cfclient.utils.config:Config file read from [/home/bitcraze/.config/cfclient/config.json]
INFO:cfclient.utils.input.inputinterfaces:Could not initialize [zmqpull]: ZMQ input disabled in config file
INFO:cfclient.utils.zmq_param:Biding ZMQ for parameters at tcp://*:1213
INFO:cfclient.utils.zmq_led_driver:Biding ZMQ for LED driverat tcp://*:1214
INFO:cfclient.utils.input:Using device blacklist [(VirtualBox|VMware)]
INFO:cflib.crtp.radiodriver:v0.53 dongle with serial N/A found

(python3:2636): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed

(python3:2636): Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion 'GTK_IS_WIDGET (widget)' failed
INFO:cflib.drivers.cfusb:Looking for devices....
INFO:cflib.crtp.radiodriver:v0.53 dongle with serial N/A found
INFO:cflib.drivers.cfusb:Looking for devices....

[arnaud]

What happens when you try to connect, does any LED on the crazyradio blinks?

[Hank]

Before we connect to the crazyflie, the crazyflie URL should be found by scanning.
I try to press the scan button and the red LED on the crazyradio is blinking but no any URL interface appears, so i can't get any URL to connect, therefore, i can't see the green LEDs on the crazyradio and the crazyflie are blinking like before.

[arnaud]

Have you changed the address of the Crazyflie? You can verify that by connecting the Crazyflie with USB, connect the client to it (the scan should show usb://0) and then you can click on "connect/configure 2.0". The default address (the one scanned by default) is 0xe7e7e7e7e7.

[Hank]

You are right!! I remember that i changed crazyflie's address few days ago. i try your way and everything is OK, thank you a lot!

[arnaud]

Glad to hear! Have fun with your connected Crazyflie then .