**NOTE** the terminal session mentioned in the following text can also be setup via USB-UART instead of Ethernet. - Power on two SDR boards. Call one board "AP board" and the other "client board". On each board, the TX and RX antenna should vertical/orthogonal to each other as much as possible to gain a good TX/RX isolation. - Connect a computer to the AP board via Ethernet cable. The computer should have static IP 192.168.10.1. Open a terminal on the computer, and then in the terminal: ``` ssh root@192.168.10.122 (password: openwifi) cd openwifi ./fosdem.sh (It will create a WiFi AP by hostapd program with config file: hostapd-openwifi.conf) (Wait for the script completed) cat /proc/interrupts (Execute the "cat ..." command for several times) (You should see the number of "sdr,tx_itrpt1" grows, because it sends the "openwifi" beacon periodically) ``` - Connect another computer to the client board via Ethernet cable. The computer should have static IP 192.168.10.1. Open a terminal on the computer, and then in the terminal: ``` ssh root@192.168.10.122 (password: openwifi) service network-manager stop cd openwifi ./wgd.sh (Wait for the script completed) ifconfig sdr0 up iwlist sdr0 scan (The "openwifi" AP should be listed in the scanning results) wpa_supplicant -i sdr0 -c wpa-openwifi.conf ``` If wpa-openwifi.conf is not on board, please create it with [this content](https://github.com/open-sdr/openwifi/blob/master/user_space/wpa-openwifi.conf). - Now the client is trying to associate with the AP. You should see like: ``` root@analog:~/openwifi# wpa_supplicant -i sdr0 -c wpa-openwifi.conf Successfully initialized wpa_supplicant sdr0: CTRL-EVENT-SCAN-STARTED sdr0: SME: Trying to authenticate with 66:55:44:33:22:8c (SSID='openwifi' freq=5220 MHz) sdr0: Trying to associate with 66:55:44:33:22:8c (SSID='openwifi' freq=5220 MHz) sdr0: Associated with 66:55:44:33:22:8c sdr0: CTRL-EVENT-CONNECTED - Connection to 66:55:44:33:22:8c completed [id=0 id_str=] ``` The AP board terminal should print like: ``` ... sdr0: STA 66:55:44:33:22:4c IEEE 802.11: authenticated sdr0: STA 66:55:44:33:22:4c IEEE 802.11: associated (aid 1) sdr0: AP-STA-CONNECTED 66:55:44:33:22:4c sdr0: STA 66:55:44:33:22:4c RADIUS: starting accounting session 613E16DE-00000000 ``` If not, please adjust antenna/distance and re-run the commands on the client side. - After association is done, in another terminal of client (**DO NOT** terminate wpa_supplicant in the original client terminal!): ``` dhclient sdr0 (Wait for it completed) ifconfig sdr0 (Now you should see the IP address like 192.168.13.x allocated by AP) ping 192.168.13.1 (Ping the AP) ``` Now the communication link should be already setup between the AP and the client.