topic i.MX8-MEVK Wifi Support in i.MX Processors

i.MX8-MEVK Wifi Support

simonwan — Mon, 25 Mar 2019 22:00:09 GMT

Hi experts,

I was recently working with i.MX 8M Evaluation Kit, and I set up the board with a self-built fsl-image-qt5-validation-imx image by following the i.MX Yocto Project User's Guide.

Now, if I run command ifconfig, I get only eth0 and lo.

By checking iwconfig, I get p2p0, wlan0, eth0, and lo. However, I cannot bring the wlan0 up correctly.

I tried to configure the wifi name and password by:

1) editing the file /ect/wpa-supplicant with wifi configuration, and then execute the command:

wpa_supplicant -B -D wext -i wlan0 -c /etc/wpa_supplicant.conf

which gives me the error:

Successfully initialized wpa_supplicantwext -i wlan0 -c /etc/wpa_supplicant.conf
rfkill: Cannot open RFKILL contro[ 557.160543] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
l device
ioctl[SIOCSIWPMKSA]: Invalid argument
ioctl[SIOCSIWPMKSA]: Invalid argument

2) Execute the iwconfig command:

iwconfig wlan0 essid $SSID key s:$PASSWORD

which gives me the error:

Error for wireless request "Set Encode" (8B2A) :
SET failed on device wlan0 ; Invalid argument.

Any idea about how to enable the wifi connection?

Simon

Re: i.MX8-MEVK Wifi Support

Rita_Wang — Tue, 26 Mar 2019 03:59:46 GMT

Hi Simon,

About the set WiFi. You can try to run the below shell commands:

ifconfig wlan0 down

ifconfig wlan0 up

$nano /etc/wpa_supplicant.conf

ctrl_interface=/var/run/wpa_supplicant

ctrl_interface_group=0

update_config=1

network={

ssid="</ the name of your internet acces point>"

key_mgmt=WPA-PSK

psk="</ the password of your internet access point>"

proto=WPA2

}

$wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf -D nl80211

$udhcpc -i wlan0

Have a great day,
Rita

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Re: i.MX8-MEVK Wifi Support

Rita_Wang — Tue, 26 Mar 2019 04:02:34 GMT

And about add wifi you also can refer to the follow thread, hope this can do help for you.

https://community.nxp.com/message/1074261?commentID=1074261#comment-1074261

Re: i.MX8-MEVK Wifi Support

simonwan — Tue, 26 Mar 2019 16:46:05 GMT

Hi Rita,

Thanks a lot for the detailed instructions.

udhcpc -i wlan0 is what I missed before. Thank you and have a great day :smileyhappy:

Re: i.MX8-MEVK Wifi Support

simonwan — Tue, 26 Mar 2019 21:06:42 GMT

By the way, actually I have two WiFi APs, and the other one is managed as WPA-EAP.

I'm wondering if there is anything needs to be changed besides modifying the file /etc/wpa_supplicant.conf to connect with this AP?

I have the question because after I modify the .conf according to the example here, my board still cannot access the EAP AP, while the WPA2 case works fine.

I suspect I may change the command

wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf -D nl80211

while I don't find any instruction about this yet.

Please let me know if you have any suggestion, thank you in advance.

Re: i.MX8-MEVK Wifi Support

Rita_Wang — Thu, 28 Mar 2019 06:14:06 GMT

Hi Simon,

Here could you tell me what are the interface of your two wifi, both SDIO, or others?

Have a nice day

Rita

Re: i.MX8-MEVK Wifi Support

VinithNama — Tue, 10 Aug 2021 05:56:19 GMT

Hi ,

After using the above commands you have specified, I am getting the below error

"rfkill: Cannot open RFKILL control device"

and after I'm using the command udhcpc -i wlan0 it shows nothing is getting or wifi is not getting connected.

udhcpc: started, v1.31.0

udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover