Code/Server/Server.py get_interface_ip() fails on RasPi 4 with Raspberry Pi OS Bookworm

[emendir]

When running the server code with the following commands

cd ~/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server
sudo python main.py

I get the following error:

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
Traceback (most recent call last):
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/main.py", line 85, in <module>
    myshow=MyWindow()
           ^^^^^^^^^^
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/main.py", line 23, in __init__
    self.on_and_off_server()
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/main.py", line 50, in on_and_off_server
    self.server.turn_on_server()
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/Server.py", line 50, in turn_on_server
    HOST=self.get_interface_ip()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/Server.py", line 44, in get_interface_ip
    return socket.inet_ntoa(fcntl.ioctl(s.fileno(),
                            ^^^^^^^^^^^^^^^^^^^^^^^
OSError: [Errno 99] Cannot assign requested address

OS info:
Linux raspberrypi 6.1.0-rpi6-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.58-1+rpt2 (2023-10-27) aarch64 GNU/Linux

The system has an IP network connection while producing this error.

Any ideas as to the cause of and solution to this problem?

[Shaynee-MO]

The system has an IP network connection while producing this error.
Would you mind sending us a screenshot of the IP network connection?

[emendir]

I'm using the raspberry pi's ethernet port. (eth0)
Here's the network connection config as displayed by the ip addr command, with sensitive digits blanked out with X:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether XX:XX:XX:XX:XX:XX brd ff:ff:ff:ff:ff:ff
    inet 192.168.XX.XX/24 brd 192.168.XX.255 scope global dynamic noprefixroute eth0
       valid_lft 259098sec preferred_lft 259098sec
    inet6 fe80::XXXX:XXXX:XXXX:XXXX/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
   link/ether XX:XX:XX:XX:XX:XX brd ff:ff:ff:ff:ff:ff

[Shaynee-MO]

Here is an image of our raspberry pi OS, you can download and write it to your Raspberry Pi and try again.
https://drive.google.com/file/d/1wbHLgsfKt4HgR8Ck9yGjvVc2Tvtvsyqj/view?usp=drive_link

[emendir]

I have managed to narrow down the issue a little further. This error only occurs when using wired-LAN using the RasPi's ethernet port instead of wireless LAN.

Workaround:

Connect to wireless LAN instead of wired-LAN.

Having found this workaround, the problem is still not solved.

I expect we can call it a software bug, that using wired-LAN causes this error?
Or is this a limitation of the network architecture between client and server?

In the latter case, it would be useful to provide the user with a helpful message instructing them to connect to a wireless LAN instead of this relatively useless error-message.

[Shaynee-MO]

Hi! Many thanks for the input. We will make it clear in our tutorial. We are sorry for any inconvenience it may cause.

[developervova]

Hi! Where can I see this explanation?

[jaywalker68]

Hi, I'm having the same issue when I run sudo python camera.py. I'm using a raspberry pi 5, connected to it via wifi and using RealVNC on Windows 11. When I run env | grep XDG I see XDG_RUNTIME_DIR=/run/user/1000.

[0:32:17.433523222] [2937] INFO Camera camera_manager.cpp:325 libcamera v0.3.2+99-1230f78d
[0:32:17.441506811] [2940] INFO RPI pisp.cpp:695 libpisp version v1.0.7 28196ed6edcf 29-08-2024 (16:33:32)
[0:32:17.452433417] [2940] INFO RPI pisp.cpp:1154 Registered camera /base/axi/pcie@120000/rp1/i2c@88000/ov5647@36 to CFE device /dev/media0 and ISP device /dev/media2 using PiSP variant BCM2712_C0
[0:32:17.456965803] [2937] INFO Camera camera.cpp:1197 configuring streams: (0) 640x480-XBGR8888 (1) 640x480-GBRG_PISP_COMP1
[0:32:17.457175933] [2940] INFO RPI pisp.cpp:1450 Sensor: /base/axi/pcie@120000/rp1/i2c@88000/ov5647@36 - Selected sensor format: 640x480-SGBRG10_1X10 - Selected CFE format: 640x480-PC1g
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
[0:32:21.004321378] [2944] INFO Camera camera.cpp:1197 configuring streams: (0) 2592x1944-BGR888 (1) 2592x1944-GBRG_PISP_COMP1
[0:32:21.007719210] [2940] INFO RPI pisp.cpp:1450 Sensor: /base/axi/pcie@120000/rp1/i2c@88000/ov5647@36 - Selected sensor format: 2592x1944-SGBRG10_1X10 - Selected CFE format: 2592x1944-PC1g
[0:32:21.380299090] [2944] INFO Camera camera.cpp:1197 configuring streams: (0) 640x480-XBGR8888 (1) 640x480-GBRG_PISP_COMP1
[0:32:21.384028255] [2940] INFO RPI pisp.cpp:1450 Sensor: /base/axi/pcie@120000/rp1/i2c@88000/ov5647@36 - Selected sensor format: 640x480-SGBRG10_1X10 - Selected CFE format: 640x480-PC1g
leroy@reliance1:~/Downloads/Freenove_4WD_Smart_Car_Kit_for_Raspberry_Pi-master/Code/Server $ env | grep XDG
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_MENU_PREFIX=lxde-pi-
XDG_SEAT=seat0
XDG_SESSION_DESKTOP=LXDE-pi-labwc
XDG_SESSION_TYPE=wayland
XDG_GREETER_DATA_DIR=/var/lib/lightdm/data/leroy
XDG_CURRENT_DESKTOP=labwc:wlroots
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_CLASS=user
XDG_VTNR=7
XDG_SESSION_ID=1
XDG_RUNTIME_DIR=/run/user/1000
XDG_DATA_DIRS=/usr/local/share:/usr/share/raspi-ui-overrides:/usr/share:/usr/share/gdm:/var/lib/menu-xdg:/usr/local/share:/usr/share:/var/lib/snapd/desktop
ORIGINAL_XDG_CURRENT_DESKTOP=labwc:wlroots

[techapplez]

When running the server code with the following commands

cd ~/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server
sudo python main.py

I get the following error:

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
Traceback (most recent call last):
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/main.py", line 85, in <module>
    myshow=MyWindow()
           ^^^^^^^^^^
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/main.py", line 23, in __init__
    self.on_and_off_server()
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/main.py", line 50, in on_and_off_server
    self.server.turn_on_server()
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/Server.py", line 50, in turn_on_server
    HOST=self.get_interface_ip()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hex/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server/Server.py", line 44, in get_interface_ip
    return socket.inet_ntoa(fcntl.ioctl(s.fileno(),
                            ^^^^^^^^^^^^^^^^^^^^^^^
OSError: [Errno 99] Cannot assign requested address

OS info: Linux raspberrypi 6.1.0-rpi6-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.58-1+rpt2 (2023-10-27) aarch64 GNU/Linux

The system has an IP network connection while producing this error.

Any ideas as to the cause of and solution to this problem?

I think i had the same error and you only have to run:

cd ~/Freenove_Big_Hexapod_Robot_Kit_for_Raspberry_Pi/Code/Server
sudo python main.py -tn

this works if you use ssh and no vnc.