WiFi Configuration and Usage¶
The following Wiki pages were previously created for other Critical Link products the integrated WiFi 802.11 functionality. We highly recommend you take a look through them for information about using WiFi in general.
L138 WiFi Wiki
TiWi-R2 WiFi/BT Expansion Board
335x Compatible WiFi Devices
Short guide on WiFi usage¶
- Make an entry at the top of the /etc/wpa_supplicant.conf file for your WiFi network based on the examples provided in that document or our L138 WiFi wiki
# Example of WPA network network={ ssid="your_ssid" proto=WPA key_mgmt=WPA-PSK pairwise=TKIP group=TKIP psk="ascii_passphrase" }
- Bring up the WLAN0 interface (WiFi 802.11 B/G/N)
ifup wlan0
- Output similar to the following should be seen
root@mitysom-335x ~ $ ifup wlan0 [ 655.651519] wl12xx_set_power omap_hsmmc.1 s=0 on=1 vdd=21 [ 656.164672] wl1271: firmware booted (Rev 6.3.0.0.77) [ 656.231445] wl1271: down [ 656.241333] wl12xx_set_power omap_hsmmc.1 s=0 on=0 vdd=0 [ 657.281524] wl12xx_set_power omap_hsmmc.1 s=0 on=1 vdd=21 [ 657.794738] wl1271: firmware booted (Rev 6.3.0.0.77) [ 659.861572] wl1271: Association completed. udhcpc (v1.13.2) started Sending discover... Sending select for 10.0.102.191... Lease of 10.0.102.191 obtained, lease time 7200 adding dns 10.0.0.1
- Issuing the "iwconfig" command should show the current wireless connection settings/status
root@mitysom-335x ~ $ iwconfig lo no wireless extensions. wlan0 IEEE 802.11abgn ESSID:"CriticalLink" Mode:Managed Frequency:2.412 GHz Access Point: C6:9F:DB:E9:32:BA Bit Rate=36 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on Link Quality=48/70 Signal level=-62 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:2 Missed beacon:0 eth0 no wireless extensions. can0 no wireless extensions.
Scanning for networks without configuring a connection/AP¶
This method allows you to confirm that the WiFi radio is functioning properly. It does not require a configured connection but will list all access points that the WiFi radio can detect and print their capabilities.
- Bring up the WLAN0 interface (WiFi 802.11 B/G/N)
root@mitysom-335x ~ $ ifup wlan0
- Scan for networks in the area
root@mitysom-335x ~ $ iwlist wlan0 scan wlan0 Scan completed : Cell 01 - Address: C6:9F:DB:E9:32:BA Channel:1 Frequency:2.412 GHz (Channel 1) Quality=50/70 Signal level=-60 dBm Encryption key:on ESSID:"CriticalLink" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s 9 Mb/s; 12 Mb/s; 18 Mb/s Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=0000003dcb9e65a6 Extra: Last beacon: 1750ms ago IE: Unknown: 000C437269746963616C4C696E6B IE: Unknown: 010882848B960C121824 IE: Unknown: 030101 IE: Unknown: 2A0100 IE: Unknown: 2F0100 IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK IE: Unknown: 32043048606C IE: Unknown: 2D1ACC111BFFFF000000000000000000000000000000000000000000 IE: Unknown: 3D1601001F00000000000000000000000000000000000000 IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK IE: Unknown: DD180050F202010107000364000027A4000041435E0061322F00 IE: Unknown: DD0900037F01010000FF7F IE: Unknown: DD0A00037F04010002004000 IE: Unknown: DD1E00904C33CC111BFFFF000000000000000000000000000000000000000000 IE: Unknown: DD1A00904C3401001F00000000000000000000000000000000000000 IE: Unknown: DD0C00156D0001000000E5020014
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