Test WIFI under Yocto - TechNexion/u-boot-edm GitHub Wiki

Test WIFI STA mode under Yocto 2.2/2.4/2.5:

WIFI connection

Check if the wifi module is loaded.

For QCA WLAN:

~# lsmod    
Module               Size  Used by   
wlan                 4673536  0

Run “connmanctl” in interactive mode.

~# connmanctl

Scan and list the wifi hotspots, then register the agent to handle user requests.

connmanctl> scan wifi   
Scan completed for wifi   
connmanctl> services   
    hotspot           wifi_4439c4970d84_544543484e4558494f4e_managed_psk   
   
connmanctl> agent on   
Agent registered  

Connect to the hotspot and enter the passphrase.
  connmanctl> connect wifi_4439c4970d84_544543484e4558494f4e_managed_psk  

 Agent RequestInput wifi_4439c4970d84_544543484e4558494f4e_managed_psk   
   Passphrase = [ Type=psk, Requirement=mandatory, Alternates=[ WPS ] ]   
   WPS = [ Type=wpspin, Requirement=alternate ]   
 Passphrase?   
 Connected wifi_4439c4970d84_544543484e4558494f4e_managed_psk   
Quit the interactive mode of “connmanctl”.   
 connmanctl> quit

Test if wifi actually works.

 ~# ping www.google.com   
 PING www.google.com (203.66.124.251): 56 data bytes   
 64 bytes from 203.66.124.251: seq=0 ttl=59 time=4.905 ms   
 64 bytes from 203.66.124.251: seq=1 ttl=59 time=12.278 ms  
 64 bytes from 203.66.124.251: seq=2 ttl=59 time=4.307 ms

For the next boot, connman will automatically connect to the hotspot you used before.

Test WIFI AP mode under Yocto 2.2/2.4/2.5:

Connect ethernet cable and get IP from DHCP server.

~# udhcpc -i eth0
udhcpc: started, v1.27.2
udhcpc: sending discover
udhcpc: sending select for 10.20.30.157
udhcpc: lease of 10.20.30.157 obtained, lease time 1200
/etc/udhcpc.d/50default: Adding DNS 10.20.30.240
/etc/udhcpc.d/50default: Adding DNS 1.1.1.1
/etc/udhcpc.d/50default: Adding DNS 168.95.192.1

Create hotspot with WPA + WPA2 passphrase.

~# connmanctl tether wifi on <ssid> <passphrase>

e.g.

~# connmanctl tether wifi on SAP 12345678

Use your cell phone to connect to hotspot SAP to get wifi connectivity.

Clean the stored settings of hotspot.

~# rm /var/lib/connman/*/settings

Switch off wifi.

~# connmanctl disable wifi

Switch on wifi.

~# connmanctl enable wifi

Troubleshooting

  1. Duplicated AP name shows when scanning wifi hotspots:

e.g.

connmanctl> services
    TECHNEXION(5G)       wifi_001f7b311132_544543484e4558494f4e28354729_managed_psk
    TECHNEXION(5G)       wifi_021f7bb51132_544543484e4558494f4e28354729_managed_psk

The string:

wifi_001f7b311132_544543484e4558494f4e28354729_managed_psk

The prefix 001f7b is the MAC address specifically for TechNexion WIFI chip.

wifi_021f7bb51132_544543484e4558494f4e28354729_managed_psk

The prefix 021f7b is the virtual MAC address generated for p2p interface. (Note: This virtual MAC address follows the administered addresses rule to be generated.)

If you don't want p2p to show in hotspot scan:

iw dev p2p0 del

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