Hello Team,
The WiFi was working fine. But today it doesn’t recognize any wireless connections. Ethernet connection is visible but the internet is not working. I used the same ethernet cable and connected to my-pc and the internet is working.
I ran the “ip a” command. The output were lo, enpls0, hnet0, docker0. No wlan0.
I did a “sudo systemctl restart NetworkManager” still nothing.
I restarted the bot, shut it down and again turned on. Please help
Hello @QuackerCoder,
Does the lsusb command return a device of type Ralink Technology, Corp. MT7601U Wireless Adapt?
No, there is no wireless adapt device in the list
I tried to reboot the ROSbot, it’s stuck on the “UP bridge the gap” image since 15-20 mins now. Also, only 1 LED light is on (near to the power toggle button). Can you please provide me a solution I have my competition next week and I need this robot to be functional.
The lack of a wifi device is very worrying, and the fact that the image does not boot suggests kernel problems. What changes did you make before the boot problem occurred?
I think it would be best to reinstall the OS. Installing Husarion OS | Husarion
I made no changes. I was working on the ROSbot, it restarted automatically. And when it booted the wifi was not able to connect.
I have started the ubuntu in recovery mode
and got this issue:
usb 1 - 3: new full-speed USB device number 5 using xhci_hcd
usb 1 - 3: device descriptor read/64, error -71
usb1-port3: Unable to enumerate USB device
Update: The ROSbot is booting but still no WiFi connections detected
I would have to read more to find out if it’s a hardware problem: a disconnected module or a software problem. If you were tinkering with something in the robot, the module may have been disconnected. If the problem appeared after configuring the system settings, you would probably have to read more in the logs to find out what the source of the problem is.
A temporary solution may be to plug a Wi-Fi module into the rear USB port. As for the Ethernet port. It is set to a static address, so 192.168.77.2/24. It is therefore necessary to change this address or the router settings.
I checked, it was hardware issue. The wifi module was overheating and it is completely destroyed. I have added a USB wifi adapter. But there is a new issue now rplidar won’t start
husarion@husarion:~$ docker compose up -d rplidar
[+] Running 0/1
⠹ Container rplidar Starting 0.2s
Error response from daemon: error gathering device information while adding custom device “/dev/ttyUSB0”: no such file or directory
husarion@husarion:~$ ls /dev/tty*
/dev/tty /dev/tty18 /dev/tty28 /dev/tty38 /dev/tty48 /dev/tty58 /dev/ttyS0 /dev/ttyS19 /dev/ttyS29
/dev/tty0 /dev/tty19 /dev/tty29 /dev/tty39 /dev/tty49 /dev/tty59 /dev/ttyS1 /dev/ttyS2 /dev/ttyS3
/dev/tty1 /dev/tty2 /dev/tty3 /dev/tty4 /dev/tty5 /dev/tty6 /dev/ttyS10 /dev/ttyS20 /dev/ttyS30
/dev/tty10 /dev/tty20 /dev/tty30 /dev/tty40 /dev/tty50 /dev/tty60 /dev/ttyS11 /dev/ttyS21 /dev/ttyS31
/dev/tty11 /dev/tty21 /dev/tty31 /dev/tty41 /dev/tty51 /dev/tty61 /dev/ttyS12 /dev/ttyS22 /dev/ttyS4
/dev/tty12 /dev/tty22 /dev/tty32 /dev/tty42 /dev/tty52 /dev/tty62 /dev/ttyS13 /dev/ttyS23 /dev/ttyS5
/dev/tty13 /dev/tty23 /dev/tty33 /dev/tty43 /dev/tty53 /dev/tty63 /dev/ttyS14 /dev/ttyS24 /dev/ttyS6
/dev/tty14 /dev/tty24 /dev/tty34 /dev/tty44 /dev/tty54 /dev/tty7 /dev/ttyS15 /dev/ttyS25 /dev/ttyS7
/dev/tty15 /dev/tty25 /dev/tty35 /dev/tty45 /dev/tty55 /dev/tty8 /dev/ttyS16 /dev/ttyS26 /dev/ttyS8
/dev/tty16 /dev/tty26 /dev/tty36 /dev/tty46 /dev/tty56 /dev/tty9 /dev/ttyS17 /dev/ttyS27 /dev/ttyS9
/dev/tty17 /dev/tty27 /dev/tty37 /dev/tty47 /dev/tty57 /dev/ttyprintk /dev/ttyS18 /dev/ttyS28
husarion@husarion:~$ ls /dev/ttyUS*
ls: cannot access ‘/dev/ttyUS*’: No such file or directory
Is it possible to run rplidar from a different serial_port
The RPlidar, regardless of the port it was connected to, should be displayed as /dev/ttyUSB*, and lsusb should return the device:
Bus 001 Device 003: ID 10c4:ea60 Silicon Labs CP210x UART Bridge.
I wonder if the device was also damaged or if you disconnected the power supply to the rplidar module.