To temporarily stop the WiFi from spamming the console: systemctl stop wpa_supplicant@wlan0.service
To permanently stop WiFi: systemctl disable wpa_supplicant@wlan0.service
To re-enable: systemctl enable wpa_supplicant@wlan0.service
The only reason why WiFi did not just work out of the box was
because I failed to connect the antenna. However, if the WiFi AP
requires a passphrase (mine does), the wpa_supplicant configuration
needs to be updated before the overo will be able to authenticate.
The only change that was actually required was to edit
/etc/wpa_supplicant/wpa_supplicant-wlan0.conf
to add the ssid and passphrase for my network. The file
/etc/wpa_supplicant.conf is not used and
should be deleted if it exists.
It worked! It only seemed to work, it was actually
routing the traffic out the ethernet port.
overo:
root@overo:/etc/network# rm /var/run/wpa_supplicant/wlan0
root@overo:/etc/network# ifup wlan0
Successfully initialized wpa_supplicant
[ 403.323760] wlcore: PHY firmware version: Rev 8.2.0.0.195
[ 403.430541] wlcore: firmware booted (Rev 8.8.0.0.13)
[ 403.473144] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
ioctl[SIOCSIWMODE]: Operation not supported
ioctl[SIOCGIWRANGE]: Operation not supported
ioctl[SIOCGIWMODE]: Operation not supported
ioctl[SIOCSIWAP]: Operation not supported
ioctl[SIOCSIWESSID]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
run-parts: /etc/network/if-up.d: No such file or directory
root@overo:/etc/network# ifconfig
eth0 Link encap:Ethernet HWaddr 00:15:C9:29:2B:75
inet addr:192.168.0.215 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::215:c9ff:fe29:2b75/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:654 errors:0 dropped:0 overruns:0 frame:0
TX packets:58 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:66991 (65.4 KiB) TX bytes:7728 (7.5 KiB)
Interrupt:32
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:167 errors:0 dropped:0 overruns:0 frame:0
TX packets:167 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:12762 (12.4 KiB) TX bytes:12762 (12.4 KiB)
wlan0 Link encap:Ethernet HWaddr 5C:31:3E:58:5D:5E
inet addr:192.168.0.244 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
root@overo:/etc/network#
I had to manually delete the file
/var/run/wpa_supplicant/wlan0
that was left over from a previous failed attempt. There were several
error/warning messages that I ignored. This configuration sets a
static IP address of 192.168.0.244. I was able to ping the wlan0
interface from my host machine, but I later determined that the
traffic was somehow still using the ethernet cable.
I should have looked a bit closer: These files already
existed with default values: /etc/wpa_supplicant.conf
/etc/wpa_supplicant/wpa_supplicant-wlan0.conf
/etc/wpa_supplicant.conf:
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
network={
key_mgmt=NONE
}
/etc/wpa_supplicant/wpa_supplicant-wlan0.conf:
# Adjust this file for your network. See [1] for
# more details.
# [1] http://linux.die.net/man/5/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
# Connect to any open network
network={
key_mgmt=NONE
}
# Connect to a WPA2 protected network
#network={
# ssid="add-your-ascii-ssid"
# proto=WPA2
# key_mgmt=WPA-PSK
# pairwise=CCMP TKIP
# group=CCMP TKIP
# scan_ssid=1
# psk="add-your-ascii-passphrase"
# priority=10
#}
Side note: I discovered that the overo includes a full version of
vim, not just the busybox version.
I changed /etc/wpa_supplicant.conf and
/etc/wpa_supplicant/wpa_supplicant-wlan0.conf,
disconnected the ethernet cable, and rebooted. I then ran "ifup wlan0".
It complained about /var/run/wpa_supplicant/wlan0 so I deleted it
and tried again. It worked!
overo:
Poky (Yocto Project Reference Distro) 1.8 overo ttyO2
overo login: root
root@overo:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:15:C9:29:2B:75
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:64 (64.0 B)
Interrupt:32
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:160 errors:0 dropped:0 overruns:0 frame:0
TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:12160 (11.8 KiB) TX bytes:12160 (11.8 KiB)
wlan0 Link encap:Ethernet HWaddr 5C:31:3E:58:5D:5E
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
root@overo:~# ifup wlan0
Successfully initialized wpa_supplicant
ioctl[SIOCSIWMODE]: Operation not supported
ioctl[SIOCGIWRANGE]: Operation not supported
ioctl[SIOCGIWMODE]: Operation not supported
ioctl[SIOCSIWAP]: Operation not supported
ioctl[SIOCSIWESSID]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ctrl_iface exists and seems [ 48.018585] wlcore: down
to be in use - cannot override it
Delete '/var/run/wpa_supplicant/wlan0' manually if it is not used anymore
Failed to initialize control interface '/var/run/wpa_supplicant'.
You may have another wpa_supplicant process already running or the file was
left by an unclean termination of wpa_supplicant in which case you will need
to manually remove this file before starting wpa_supplicant again.
ioctl[SIOCGIWMODE]: Operation not supported
ioctl[SIOCSIWAP]: Operation not supported
ioctl[SIOCSIWESSID]: Operation not supported
root@overo:~# rm /var/run/wpa_supplicant/wlan0
root@overo:~# ifup wlan0
Successfully initialized wpa_supplicant
[ 67.480194] wlcore: PHY firmware version: Rev 8.2.0.0.195
[ 67.590637] wlcore: firmware booted (Rev 8.8.0.0.13)
[ 67.633972] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
ioctl[SIOCSIWMODE]: Operation not supported
ioctl[SIOCGIWRANGE]: Operation not supported
ioctl[SIOCGIWMODE]: Operation not supported
ioctl[SIOCSIWAP]: Operation not supported
ioctl[SIOCSIWESSID]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODE]: Operation not supported
run-parts: /etc/network/if-up.d: No such file or directory
root@overo:~# [ 71.212615] wlan0: authenticate with c4:6e:1f:4f:b1:ca
[ 71.235992] wlan0: send auth to c4:6e:1f:4f:b1:ca (try 1/3)
[ 71.260345] wlan0: authenticated
[ 71.275970] wlan0: associate with c4:6e:1f:4f:b1:ca (try 1/3)
[ 71.289062] wlan0: RX AssocResp from c4:6e:1f:4f:b1:ca (capab=0x431 status=0 aid=6)
[ 71.326751] wlan0: associated
[ 71.330444] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 71.527435] wlcore: Association completed.
root@overo:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:15:C9:29:2B:75
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:64 (64.0 B)
Interrupt:32
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:328 errors:0 dropped:0 overruns:0 frame:0
TX packets:328 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:24970 (24.3 KiB) TX bytes:24970 (24.3 KiB)
wlan0 Link encap:Ethernet HWaddr 5C:31:3E:58:5D:5E
inet addr:192.168.0.244 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::5e31:3eff:fe58:5d5e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:18 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1418 (1.3 KiB) TX bytes:4668 (4.5 KiB)
root@overo:~# ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=27.5 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=35.8 ms
64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=25.3 ms
^C
--- 192.168.0.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 25.359/29.571/35.827/4.511 ms
root@overo:~#
I am able to ping out from overo to Pogo, but I cannot ping from
Pogo into overo. I left overo pinging and it eventually failed.
overo:
root@overo:~# ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
From 192.168.0.248 icmp_seq=1 Destination Host Unreachable
From 192.168.0.248 icmp_seq=2 Destination Host Unreachable
From 192.168.0.248 icmp_seq=3 Destination Host Unreachable
From 192.168.0.248 icmp_seq=4 Destination Host Unreachable
From 192.168.0.248 icmp_seq=5 Destination Host Unreachable
From 192.168.0.248 icmp_seq=6 Destination Host Unreachable
64 bytes from 192.168.0.1: icmp_seq=11 ttl=64 time=191 ms
64 bytes from 192.168.0.1: icmp_seq=12 ttl=64 time=99.9 ms
64 bytes from 192.168.0.1: icmp_seq=15 ttl=64 time=104 ms
64 bytes from 192.168.0.1: icmp_seq=16 ttl=64 time=113 ms
64 bytes from 192.168.0.1: icmp_seq=17 ttl=64 time=22.1 ms
64 bytes from 192.168.0.1: icmp_seq=18 ttl=64 time=21.2 ms
64 bytes from 192.168.0.1: icmp_seq=19 ttl=64 time=37.0 ms
^C
--- 192.168.0.1 ping statistics ---
19 packets transmitted, 7 received, +6 errors, 63% packet loss, time 18037ms
rtt min/avg/max/mdev = 21.210/84.227/191.435/57.386 ms, pipe 4
root@overo:~# ping 192.168.0.1 205
PING 192.168.0.205 (192.168.0.205) 56(84) bytes of data.
64 bytes from 192.168.0.205: icmp_seq=1 ttl=128 time=32.4 ms
64 bytes from 192.168.0.205: icmp_seq=2 ttl=128 time=47.2 ms
64 bytes from 192.168.0.205: icmp_seq=4 ttl=128 time=1026 ms
64 bytes from 192.168.0.205: icmp_seq=5 ttl=128 time=27.7 ms
64 bytes from 192.168.0.205: icmp_seq=6 ttl=128 time=1438 ms
64 bytes from 192.168.0.205: icmp_seq=7 ttl=128 time=1417 ms
[ 185.624572] wlcore: Beacon loss detected. roles:0x1
[ 190.434234] wlcore: Connection loss work (role_id: 0).
[ 190.440765] wlan0: Connection to AP c4:6e:1f:4f:b1:ca lost
[ 190.520294] cfg80211: Calling CRDA to update world regulatory domain
[ 194.138275] wlan0: authenticate with c4:6e:1f:4f:b1:ca
[ 194.150512] wlan0: send auth to c4:6e:1f:4f:b1:ca (try 1/3)
[ 194.181335] wlan0: authenticated
[ 194.194610] wlan0: associate with c4:6e:1f:4f:b1:ca (try 1/3)
[ 194.382629] wlan0: associate with c4:6e:1f:4f:b1:ca (try 2/3)
[ 194.542694] wlan0: associate with c4:6e:1f:4f:b1:ca (try 3/3)
[ 194.561553] wlan0: RX AssocResp from c4:6e:1f:4f:b1:ca (capab=0x431 status=0 aid=6)
[ 194.596069] wlan0: associated
[ 199.296966] wlan0: disassociated from c4:6e:1f:4f:b1:ca (Reason: 2)
I found the list of WiFi
failure codes
and "Reason 2" is "Previous authentication no longer valid, Client has
associated but is not authorised." It appears that wlan0 is
associating to the AP, allowing pings out, but then failing to
authenticate. This might explain why the AP may allow pings out but
not into the device.
While I was reading up on error codes, the overo finally authenticated.
I was then able to ping from Pogo to Overo, although the failure rate was
very high. This is undoubtedly due to having no antenna connected to the
Overo.
WiFi works much better with the antenna! WiFi now activates
automatically during boot, no longer requiring the "ifup" command, and
is using DHCP. It seems WiFi was already enabled in systemd but was
failing due to poor signal. Moral of the lesson: antennas are
important.
I am now able to ssh into Overo using Putty over the WiFi
interface.
To clean up, I deleted the /etc/network/interfaces and
/etc/network/wpa_supplicant.conf files.
Systemd
This page
describes how systemd configures the network. The files are found in
/etc/systemd/network/
I need to give my little overo a less generic name, now that I am
joining the network as a DHCP client. I dub thee,
"Tivovy!" This is set in /etc/hostname. Even
better, it just works! I am now able to ping "tivovy" from Pogo using
both IPv4 and IPv6, and ssh into Tivovy. No more static IP
addresses!
/etc/wpa_supplicant/wpa_supplicant-wlan0.conf:
# Adjust this file for your network. See [1] for
# more details.
# [1] http://linux.die.net/man/5/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
# Connect to any open network
network={
key_mgmt=NONE
}
# Connect to a WPA2 protected network
network={
ssid="Anchor1-24"
proto=WPA2
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
scan_ssid=1
psk="******"
priority=10
}
