2

I'm configuring RPi as a WiFi repeater. Built-in WiFi module works as a main network adapter and configured to receive DHCP address. Second adapter Asus N10 dongle, meant to create a local WiFi network, detected successfully after inserting as wlan1 in addition to built-in wlan0. Problem is, after reboot interface disappearing from the system (ifconfig does not show wlan1) and I need to re-insert it.

I tried configuring /etc/network/interfaces

auto wlan1 allow-hotplug wlan1 iface wlan1 inet manual

and /etc/dhcpcd.conf

interface wlan1 static ip_address=192.168.4.1/24 nohook wpa_supplicant

No effect, adapter still requires re-inserting

UPDATE dmesg output right after boot gives the following messages

[4.348457] usb 1-1.2: r8712u: USB_SPEED_HIGH with 4 endpoints [4.349986] usb 1-1.2: r8712u: Boot from EFUSE: Autoload OK [4.605101] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Feb 27 2018 03:15:32 version 7.45.154 (r684107 CY) FWID 01-4fbe0b04 [4.605826] brcmfmac: brcmf_c_preinit_dcmds: CLM version = API: 12.2 Data: 9.10.105 Compiler: 1.29.4 ClmImport: 1.36.3 Creation: 2018-03-09 18:56:28 [4.977617] usb 1-1.2: r8712u: CustomerID = 0x0010 [4.977639] usb 1-1.2: r8712u: MAC Address from efuse = 30:85:a9:6e:5a:d9 [4.977650] usb 1-1.2: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"

30:85:a9:6e:5a:d9 is Asus N10 MAC address

After I re-insert the adapter, I see new messages in the output

[436.052089] usb 1-1.2: new high-speed USB device number 7 using dwc_otg [436.184403] usb 1-1.2: New USB device found, idVendor=0b05, idProduct=1786 [436.184419] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [436.184428] usb 1-1.2: Product: ASUS EZ N Network Adapter [436.184436] usb 1-1.2: Manufacturer: Manufacturer Realtek [436.184444] usb 1-1.2: SerialNumber: 00e04c000001 [436.187629] r8712u: register rtl8712_netdev_ops to netdev_ops [436.187653] usb 1-1.2: r8712u: USB_SPEED_HIGH with 4 endpoints [436.189124] usb 1-1.2: r8712u: Boot from EFUSE: Autoload OK [436.613105] usb 1-1.2: r8712u: CustomerID = 0x0010 [436.613125] usb 1-1.2: r8712u: MAC Address from efuse = 30:85:a9:6e:5a:d9 [436.613149] usb 1-1.2: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin" [437.562399] r8712u 1-1.2:1.0 wlan1: 1 RCR=0x153f00e [437.562936] r8712u 1-1.2:1.0 wlan1: 2 RCR=0x553f00e [439.682544] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready

UPDATE2

Also I receive Under-voltage detected! (0x00050005) message during every reboot. Maybe it affects hardware initialization, I'm not sure

UPDATE3

ifconfig as requested

eth0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether b8:27:eb:f9:c3:2d txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 1554 bytes 185783 (181.4 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1554 bytes 185783 (181.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.38 netmask 255.255.252.0 broadcast 192.168.3.255 inet6 fe80::f490:92fc:c558:8541 prefixlen 64 scopeid 0x20<link> ether b8:27:eb:ac:96:78 txqueuelen 1000 (Ethernet) RX packets 16671 bytes 16141581 (15.3 MiB) RX errors 0 dropped 18 overruns 0 frame 0 TX packets 11804 bytes 1416579 (1.3 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Asus adapter description, which appears after re-inserting

wlan1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether 30:85:a9:6e:5a:d9 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B)
Improve this question
7
  • please search for any messages in output of dmesg regarding the adapter before and after you re-insert it - post any relevant dmesg info in the question Commented Mar 28, 2019 at 12:38
  • Done, see update Commented Mar 28, 2019 at 13:21
  • before you re-insert it, what's the output of ifconfig -a -s Commented Mar 28, 2019 at 13:39
  • I described above, wlan0 only Commented Mar 28, 2019 at 14:09
  • I now you said what ifconfig output is ... but did you do ifconfig -a - I want to see if it's just down for some reason Commented Mar 28, 2019 at 14:20

1 Answer 1

Reset to default
1

You are using Debian networking managed with /etc/network/interfaces together with dhcpcd. It is known that there are some quirks using this combination in particular with wpa_supplicant. What I mean you can look at Differences between /etc/dhcpcd.conf and /etc/network/interfaces?. I suppose you are also using hostapd and dnsmasq which are additional components needing there own configuration.

If you do not find a solution with this classic setup you may consider to give systemd-networkd a try. It is more straightforward and does not need additional components. It has everything built-in. You only have to configure it and it distinguish clean between the single interfaces wlan0 and wlan1. How to do it you may have a look at Access point as WiFi repeater with additional WiFi-dongle.

Improve this answer
2
  • I tried it together and separately, still no effect. I believe the reason is more low-level, as long as wlan1 is not in the system and not listed by ifconfig until re-inserted. What kind of initialization happen when I insert the adapter? I can see it in dmesg. If I can perform it on boot, the problem is solved Commented Mar 29, 2019 at 2:36
  • @YuriS.Cherkasov Seems to be a problem with autoplug. This is managed by udev rules. You may have a look at it. Commented Mar 29, 2019 at 10:43

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.