# WiFi > Wi-Fi (or WiFi) is a local area wireless computer networking technology that allows electronic devices to connect to the network, mainly using the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF ISM radio bands. Wikipedia > > Intel Edison Features > > > Wi-Fi peer-to-peer connectivity with Wi-Fi Direct, Allows two Intel® Edison devices (or one Intel® Edison device and a smartphone) to create a direct Wi-Fi connection to each other without an access point. > > > > Wi-Fi multirole, Allows a connection to an access point simultaneously with Wi-Fi Direct operation. > > > > Wi-Fi IBSS mode, Allows creation of multinode ad hoc networks that contain no access point. * [WiFi Wikipedia](https://en.wikipedia.org/wiki/Wi-Fi) * [Intel® Edison Boards Wi-Fi User Guide](http://www.intel.com/support/edison/sb/CS-035380.htm) * [Intel® Edison Network Access](https://software.intel.com/en-us/connecting-to-a-network-intel-edison-board) * [Edison Wi-Fi Configuration](http://rwx.io/blog/2015/08/16/edison-wifi-config/) * [Realtek 8192 chipset driver, ported to kernel 3.11](https://github.com/pvaret/rtl8192cu-fixes) ## Kernel Integration ### Kernel Display Message ```bash root@edison:~# dmesg | grep -i wifi [ 0.189658] Using generic wifi platform data [ 0.189675] wifi_platform_data: GPIO == 64 [ 3.850154] found wifi platform device wlan [ 4.171606] wifi_platform_set_power = 1 [ 4.373687] wifi_platform_bus_enumerate device present 1 [ 4.412928] wifi_platform_get_mac_addr [ 4.413069] wifi_get_mac_addr_intel: unable to open /config/wifi/mac.txt [ 4.420354] wifi_platform_set_power = 0 [ 4.421428] wifi_platform_bus_enumerate device present 0 [ 38.194385] wl_android_wifi_on in [ 38.194403] wifi_platform_set_power = 1 [ 39.117444] wifi_platform_get_mac_addr [ 39.117488] wifi_get_mac_addr_intel: unable to open /config/wifi/mac.txt ``` ### Kernel Modules ```bash root@edison:~# lsmod Module Size Used by0 usb_f_acm 14335 1 ... bcm_bt_lpm 13708 0 bcm4334x 587105 0 ``` ## Applications / Libraries > RFKill > > > rfkill is a small userspace tool to query the state of the rfkill switches, buttons and subsystem interfaces. Some devices come with a hard switch that lets you kill different types of RF radios: 802.11 / Bluetooth / NFC / UWB / WAN / WIMAX / FM. Some times these buttons may kill more than one RF type. The Linux kernel rfkill subsystem exposes these hardware buttons and lets userspace query its status and set its status through a /dev/rfkill. Given that at times some RF devices do not have hardware rfkill buttons rfkill the Linux kernel also exposes software rfkill capabilities that allows userspace to mimic a hardware rfkill event and turn on or off RF. [Rfkill Homepage](https://wireless.wiki.kernel.org/en/users/documentation/rfkill) ```bash root@edison:~# rfkill list 0: phy0: wlan Soft blocked: no Hard blocked: no 1: brcmfmac-wifi: wlan Soft blocked: no Hard blocked: no 2: bcm43xx Bluetooth: bluetooth Soft blocked: yes Hard blocked: no ``` ### Usage Models, Ubilinux ```bash edison@ubilinux:~$ su Password: edison root@ubilinux:/home/edison# cd root@ubilinux:~# nano /etc/network/interfaces # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback #auto usb0 #iface usb0 inet static # address 192.168.2.15 # netmask 255.255.255.0 auto wlan0 iface wlan0 inet dhcp # For WPA wpa-ssid INFINITUMxxxx wpa-psk yyyy # For WEP #wireless-essid itesm #wireless-mode Managed #wireless-key s:"" root@ubilinux:~# ifup wlan0 root@ubilinux:~# reboot ``` ### Usage Models, Yocto #### Default Configuration ```bash root@Edison:~# configure_edison --wifi Configure Edison: WiFi Connection root@edison:~# ifconfig lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 ... usb0 Link encap:Ethernet HWaddr 5a:2a:15:c5:5f:7b inet addr:192.168.2.15 Bcast:192.168.2.255 Mask:255.255.255.0 ... wlan0 Link encap:Ethernet HWaddr 78:4b:87:a6:cf:5e inet addr:192.168.1.68 Bcast:0.0.0.0 Mask:255.255.255.0 root@edison:~# ping -c 3 8.8.8.8 PING google.com (173.194.115.196): 56 data bytes 64 bytes from 173.194.115.196: seq=0 ttl=58 time=28.487 ms 64 bytes from 173.194.115.196: seq=1 ttl=58 time=29.391 ms 64 bytes from 173.194.115.196: seq=2 ttl=58 time=29.773 ms --- google.com ping statistics --- 3 packets transmitted, 3 packets received, 0% packet loss round-trip min/avg/max = 28.487/29.217/29.773 ms root@edison:~# ``` #### Persistent Connection ```bash root@edison:~# configure_edison -wifi ... root@edison:~# systemctl enable wpa_supplicant root@edison:~# systemctl start wpa_supplicant ``` #### Manual Persistent Configuration Make sure there are no soft blocks ```bash root@edison:~# rfkill list ``` Make sure wlan0 is loaded and see IP ```bash root@edison:~# ifconfig ``` Load the wlan0 device driver ```bash root@edison:~# wpa_supplicant -B -Dnl80211 -iwlan0 -c/etc/wpa_supplicant/wpa_supplicant.conf ``` Get DHCP and DNS ```bash root@edison:~# busybox udhcpc -i wlan0 ``` Move usb0 to a different non-conflicting subnet ```bash root@edison:~# vi /etc/system/system/basic.target.wants/network-gadget-init.service ``` Disable usb0 device from loading ```bash root@edison:~# systemctl disable network-gadget-init.service ``` Ensure there is a wpa\_supplicant network{} definition and remove unneeded networks ```bash root@edison:~# vi /etc/wpa_supplicant/wpa_supplicant.conf ``` Enable first network definition ```bash root@edison:~# wpa_cli > enable_network 0 > select_network 0 > save > quit ``` Example WEP key wpa\_supplicant.conf ```bash ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=0 update_config=1 network={ ssid="YOURSSID" scan_ssid=1 key_mgmt=NONE auth_alg=OPEN wep_key0=f0039faded348299992344be23 } ``` Remove soft block on wlan0 ```bash root@edison:~# rfkill unblock wlan ``` Enable wifi on boot once config is confirmed correct ```bash root@edison:~# systemctl enable wa_supplicant ``` WiFi to connect at power up: ```bash systemctl enable wpa_supplicant systemctl start wpa_supplicant ``` ### Password Lenght > ... I am asked for a 5 or 13 character network password, but my network's password is 10 characters long ... [Edison WiFi setup - password must be either 5 or 13 characters](https://communities.intel.com/thread/59888?start=0\&tstart=0) ```bash --- configure_edison.orig +++ configure_edison @@ -60,6 +60,15 @@ wep_key0="%s" } ''' + WEP_26HEX = ''' +network={ + ssid="%s" + %s + key_mgmt=NONE + group=WEP104 WEP40 + wep_key0=%s +} +''' WPAPSK = ''' network={ ssid="%s" @@ -359,10 +368,13 @@ return wpa_templates.OPEN % (ssid, "scan_ssid=1") elif security == 1: password = '' - while len(password) != 5 and len(password) != 13: - print "Password must be either 5 or 13 characters." + while len(password) != 5 and len(password) != 13 and len(password) != 26: + print "Password must be either 5 or 13 ascii characters or 26 hex." password = getNetworkPassword() - return wpa_templates.WEP % (ssid, "scan_ssid=1", password) + if len(password) == 26: + return wpa_templates.WEP_26HEX % (ssid, "scan_ssid=1", password) + else: + return wpa_templates.WEP % (ssid, "scan_ssid=1", password) elif security == 2: password = '' while len(password) < 8 or len(password) > 63: @@ -384,10 +396,13 @@ return wpa_templates.OPEN % (ssid, "") elif network_map[ssid] == "WEP": password = '' - while len(password) != 5 and len(password) != 13: - print "Password must be either 5 or 13 characters." + while len(password) != 5 and len(password) != 13 and len(password) != 26: + print "Password must be either 5 or 13 ascii characters or 26 hex." password = getNetworkPassword() - return wpa_templates.WEP % (ssid, "", password) + if len(password) == 26: + return wpa_templates.WEP_26HEX % (ssid, "", password) + else: + return wpa_templates.WEP % (ssid, "", password) elif network_map[ssid] == "WPA-PSK": password = '' while len(password) < 8 or len(password) > 63: @@ -409,10 +424,13 @@ return wpa_templates.OPEN % (ssid, "scan_ssid=1") elif protocol == "WEP": password = changewifi[2] - if len(password) != 5 and len(password) != 13: - print "Password must be either 5 or 13 characters." + if len(password) != 5 and len(password) != 13 and len(password) != 26: + print "Password must be either 5 or 13 ascii characters or 26 hex." return None - return wpa_templates.WEP % (ssid, "scan_ssid=1", password) + if len(password) == 26: + return wpa_templates.WEP_26HEX % (ssid, "scan_ssid=1", password) + else: + return wpa_templates.WEP % (ssid, "scan_ssid=1", password) elif protocol == "WPA-PSK": password = changewifi[2] if len(password) < 8 or len(password) > 63: ``` ### Mode Access Point @ Ubilinux * [Ubilinux Access Point Hostapd](http://www.emutexlabs.com/forum/ubilinux/85-ubilinux-access-point-hostapd) ## Testing ToDo iPerf ...