Wi-Fi adapter for Raspberry pi 4 B

[bjlockie]

I ended up ordering an alfa awus036acm.
I might not get it until the end of the month.
Realtek seems to have most of the market in Canada.

[bjlockie]

I got it way faster than expected.
I can't get it to work though.
I rebooted my Raspberry Pi 4.

# lsusb
Bus 002 Device 002: ID 0e8d:7612 MediaTek Inc.

There is no error in dmesg and no device in ifconfig -a.

I'm going to try a later snapshot.

[bjlockie]

I got it working.
The Pi is a DHCP client though, I have to put it back in router mode.
It was a pain to get network access this time.

[castillofrancodamian]

@bjlockie

I tried a Realtek 8812au but I can only scan (I got the AP to work on my x86_64 machine with wpa_supplicant but not hostapd).

Is that in OpenWrt or another Linux distribution? Another thing, what adapter do you have to have to use rtl8812au? I have an Archer T4UHP and I cannot even scan Wi-Fi networks.

[bjlockie]

I got rid of my Realtek stuff and switched to a Mediatek 7612u.
I was using lubuntu.
It was a Netis WF2190 that is rtl8812au (the bu adapters I had were all generic).

@castillofrancodamian

I have an Archer T4UHP and I cannot even scan Wi-Fi networks.

Under OpenWrt?
Do you get an error?
Are you trying from the command line?

iwlist wlan1 scan

If the interface is down try

ip list wlan1 up

[castillofrancodamian]

I use this driver as you mentioned and it works perfectly on Linux distros like Ubuntu and derivatives. But when I connect it to a router (in my case an x86 test laptop) with OpenWrt, it doesn't work. It appears in LuCI but I cannot scan networks or create an AP. Of course I installed kmod-rtl8812au-ct.

The first command does not work. It says -ash: iwlist: not found
What do I have to wait for in the second command?

[bjlockie]

I was told the Realtek drivers can't be managed from Luci which is why I got a Mediatek device.

luci says my wifi "Device is not active" yet it scans from the command line

Lots of people create config files from the command line.
I just wanted a GUI.

@castillofrancodamian

The first command does not work. It says -ash: iwlist: not found

# iwconfig
eth1      no wireless extensions.

wlan1     IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=31 dBm   
          RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:on
          
wlan0     IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=3 dBm   
          RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off

To get iwlist:

# opkg install wireless-tools

[jeff1]

On OpenWrt rtl8812au only work on some devices building a custom image with this changes:rtl8812AU and/or rtl8814AU drivers
Working on OpenWrt x86 19.07.2 with this modification:

openwrt$ git status
HEAD detached at v19.07.2
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

        modified:   package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
        modified:   package/kernel/rtl8812au-ct/Makefile

no changes added to commit (use "git add" and/or "git commit -a")
openwrt$ git diff
diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index 634aadcee9..57808f614c 100644
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -705,7 +705,7 @@ mac80211_interface_cleanup() {
 
        for wdev in $(list_phy_interfaces "$phy"); do
                ip link set dev "$wdev" down 2>/dev/null
-               iw dev "$wdev" del
+               #iw dev "$wdev" del
        done
 }
 
diff --git a/package/kernel/rtl8812au-ct/Makefile b/package/kernel/rtl8812au-ct/Makefile
index 5c70dbd1e7..db3016dd19 100644
--- a/package/kernel/rtl8812au-ct/Makefile
+++ b/package/kernel/rtl8812au-ct/Makefile
@@ -7,10 +7,10 @@ PKG_LICENSE:=GPLv2
 PKG_LICENSE_FILES:=
 
 PKG_SOURCE_URL:=https://github.com/greearb/rtl8812AU_8821AU_linux.git
-PKG_MIRROR_HASH:=42b32c56cf31bdf3c9cd4e304c9aac761b623c8737d8c57518117acdc5a84cfe
+PKG_MIRROR_HASH:=fa689e034cad9e4683ea784b8f3cb590492ab5c68e8babd492a4e8bf2de3b114
 PKG_SOURCE_PROTO:=git
-PKG_SOURCE_DATE:=2018-11-16
-PKG_SOURCE_VERSION:=661268fd174d4a74834c82d7d3987b0a560e6c57
+PKG_SOURCE_DATE:=2020-01-12
+PKG_SOURCE_VERSION:=e0d586aa93cb8687dd7dc0e593b6a820df2d6e1d
 
 PKG_MAINTAINER:=Ben Greear <greearb@candelatech.com>
 PKG_BUILD_PARALLEL:=1

[bjlockie]

Oops, I wrote the wrong command:

# ip link set dev wlan1 up

[castillofrancodamian]

I'd better give up and wait for them to fix it. The same is not so necessary in my network.

[castillofrancodamian]

I was already able to get a list of Wi-Fi networks. First ip link set dev wlan0 up and then iwlist wlan0 scan.
This is my configuration file:

config wifi-device 'radio0'
    option type 'mac80211'
    option channel '36'
    option hwmode '11a'
    option path 'pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0'
    option disabled '1'

config wifi-iface 'default_radio0'
    option device 'radio0'
    option network 'lan'
    option mode 'ap'
    option ssid 'OpenWrt'
    option encryption 'none'