OrangePi Zero WLAN0 swaps to WLAN1

mrburns42

Hi,

I am trying to get WIFI working on my OrangePi Zero.   Most of the time when it boots, wlan0 gets changed to wlan1 and it makes the wifi connection.  However on some boots this does not occur and then WIFI fails.    Any idea why this is happening and how to get the WIFI stable on each boot?  The dmesg line where the swap occurs is :

[   38.910648] systemd-udevd[119]: renamed network interface wlan0 to wlan1

When it works, ifconfig looks like:

***********************************************************
root@OrangePizero:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 2e:97:b1:cb:11:b0
          inet6 addr: fe80::2c97:b1ff:fecb:11b0/64 Scopeink
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:600 (600.0 B)
          Interrupt:114

lo        Link encapocal Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1104 (1.0 KiB)  TX bytes:1104 (1.0 KiB)

p2p0      Link encap:Ethernet  HWaddr 2c:97:b1:cb:11:b2
          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)

wlan1     Link encap:Ethernet  HWaddr 2c:97:b1:cb:11:b1
          inet addr:192.168.42.14  Bcast:192.168.42.255  Mask:255.255.255.0
          inet6 addr: fe80::2e97:b1ff:fecb:11b1/64 Scopeink
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:39 errors:0 dropped:0 overruns:0 frame:0
          TX packets:45 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5325 (5.2 KiB)  TX bytes:4898 (4.7 KiB)
******************************************************
When it fails the ifconfig looks like:
******************************************************
root@OrangePizero:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 2e:97:b1:cb:11:b0
          inet6 addr: fe80::2c97:b1ff:fecb:11b0/64 Scopeink
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:572 (572.0 B)
          Interrupt:114

lo        Link encapocal Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  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:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

p2p0      Link encap:Ethernet  HWaddr 2c:97:b1:cb:11:b2
          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)

wlan0     Link encap:Ethernet  HWaddr 2c:97:b1:cb:11:b1
          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)
*******************************************************
My /etc/network/interfaces  is:
*******************************************************
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

# Local loopback
auto lo
iface lo inet loopback

#auto eth0
#iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet dhcp
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

allow-hotplug wlan1
iface wlan1 inet dhcp
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
******************************************************
root@OrangePizero:~# uname -a
Linux OrangePizero 3.4.39 #3 SMP PREEMPT Mon Nov 28 10:12:06 CST 2016 armv7l GNU/Linux

igorpec

Try this.
https://www.armbian.com/orange-pi-zero/
You won't have such problems, but beware that wireless chip is low quality.

mrburns42

I installed armbian and it always seems to choose wlan0.     Therefore, that port does seem to be a better fit than the Debian one.   For Debian I had to do a lot more configuration to get WIFI working as well.  
I only want to be an MQTT client with the OrangePi Zero, so I hope the wireless chip is sufficient for that.   I guess I will not know until I experiment some more.  
Thank you for the pointer to armbian.  

AllenChristophe

You can try this to lock the onboard wifi to wlan0:
1. Change the value for Predictable Network Names (so you will get wlan0,  wlan1, eth0, eth1, etc):

1. nano /boot/armbianEnv.txt

Copy code

and add:

1. extraargs=net.ifnames=0

Copy code

2. Assign the Network name to the device driver:

1. nano /etc/udev/rules.d/72-wlan-geo-dependent.rules

Copy code

and add:

1. ACTION=="add", SUBSYSTEM=="net", DRIVERS=="xradio_wlan", NAME="wlan0"

Copy code

If that does not work, you can try:

1. nano /etc/udev/rules.d/70-persistent-net.rules

Copy code

and add:

1. ACTION=="add", SUBSYSTEM=="net", DRIVERS=="xradio_wlan", NAME="wlan0"

Copy code

Reboot. The Pi Zero onboard wifi should now consistently appear as wlan0.

--Chris

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