Turtlebot3 Raspberry Pi Wireless Issue 20210118

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What Happed to Wifi

Reorganize Random exploration 

 ls /sys/class/net
       eth0  lo

ubuntu@ubuntu:/etc/netplan$ sudo netplan --debug apply
** (generate:5701): DEBUG: 18:10:24.479: Processing input file /etc/netplan/50-cloud-init.yaml..
** (generate:5701): DEBUG: 18:10:24.480: starting new processing pass
** (generate:5701): DEBUG: 18:10:24.481: wlan0: adding wifi AP 'zdome'
** (generate:5701): DEBUG: 18:10:24.481: We have some netdefs, pass them through a final round of validation
** (generate:5701): DEBUG: 18:10:24.481: wlan0: setting default backend to 1
** (generate:5701): DEBUG: 18:10:24.481: Configuration is valid
** (generate:5701): DEBUG: 18:10:24.481: eth0: setting default backend to 1
** (generate:5701): DEBUG: 18:10:24.481: Configuration is valid
** (generate:5701): DEBUG: 18:10:24.482: Generating output files..
** (generate:5701): DEBUG: 18:10:24.482: NetworkManager: definition eth0 is not for us (backend 1)
** (generate:5701): DEBUG: 18:10:24.482: Creating wpa_supplicant config
** (generate:5701): DEBUG: 18:10:24.482: wlan0: Creating wpa_supplicant configuration file run/netplan/wpa-wlan0.conf
** (generate:5701): DEBUG: 18:10:24.482: Creating wpa_supplicant unit /run/systemd/system/netplan-wpa-wlan0.service
** (generate:5701): DEBUG: 18:10:24.492: Creating wpa_supplicant service enablement link /run/systemd/system/systemd-networkd.service.wants/netplan-wpa-wlan0.service
** (generate:5701): DEBUG: 18:10:24.493: NetworkManager: definition wlan0 is not for us (backend 1)
DEBUG:netplan generated networkd configuration changed, restarting networkd
DEBUG:no netplan generated NM configuration exists
DEBUG:eth0 not found in {}
DEBUG:wlan0 not found in {}
DEBUG:Merged config:
network:
  bonds: {}
  bridges: {}
  ethernets:
    eth0:
      dhcp4: true
      dhcp6: true
      optional: true
  vlans: {}
  wifis:
    wlan0:
      access-points:
        xxx:
          password: yyy
      dhcp4: true
      dhcp6: true

DEBUG:Skipping non-physical interface: lo
DEBUG:device eth0 operstate is up, not changing
DEBUG:{}
DEBUG:netplan triggering .link rules for lo
DEBUG:netplan triggering .link rules for eth0
Warning: The unit file, sourcesudo netplan --debug apply configuration file or drop-ins of netplan-wpa-wlan0.service changed on disk. Run 'systemctl daemon-reload' to reload units.



 $ systemctl daemon-reload
       ==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===
       Authentication is required to reload the systemd state.
       Authenticating as: Ubuntu (ubuntu)
       Password: 
       ==== AUTHENTICATION COMPLETE ===

 $ ls /sys/class/net
       eth0  lo

 /sys/class/net no wireless




 $ sudo netplan apply
       Warning: The unit file, source configuration file or drop-ins of netplan-wpa-wlan0.service changed on disk. Run 'systemctl daemon-reload' to reload units.
       Warning: The unit file, source configuration file or drop-ins of netplan-wpa-wlan0.service changed on disk. Run 'systemctl daemon-reload' to reload units.

 $ sudo netplan generate

 $ sudo netplan apply
       Warning: The unit file, source configuration file or drop-ins of netplan-wpa-wlan0.service changed on disk. Run 'systemctl daemon-reload' to reload units.
 
 $ systemctl daemon-reload
       ==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===
       Authentication is required to reload the systemd state.
       Authenticating as: Ubuntu (ubuntu)
       Password: 
       ==== AUTHENTICATION COMPLETE ===

reboot - didn't help 

ubuntu@ubuntu:~/turtlebot3_ws/src/turtlebot3/turtlebot3$ ip a
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 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether b8:27:eb:0b:5d:ce brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.186/24 brd 10.0.0.255 scope global dynamic eth0
       valid_lft 78973sec preferred_lft 78973sec
    inet6 fe80::ba27:ebff:fe0b:5dce/64 scope link 
       valid_lft forever preferred_lft forever

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