1<!-- 2Author: Xianjun jiao 3SPDX-FileCopyrightText: 2019 UGent 4SPDX-License-Identifier: AGPL-3.0-or-later 5--> 6 7- 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. 8- 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: 9 ``` 10 ssh [email protected] 11 (password: openwifi) 12 cd openwifi 13 ./fosdem.sh 14 (It will create a WiFi AP by hostapd program with config file: hostapd-openwifi.conf) 15 (Wait for the script completed) 16 cat /proc/interrupts 17 (Execute the "cat ..." command for several times) 18 (You should see the number of "sdr,tx_itrpt1" grows, because it sends the "openwifi" beacon periodically) 19 ``` 20- 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: 21 ``` 22 ssh [email protected] 23 (password: openwifi) 24 service network-manager stop 25 cd openwifi 26 ./wgd.sh 27 (Wait for the script completed) 28 ifconfig sdr0 up 29 iwlist sdr0 scan 30 (The "openwifi" AP should be listed in the scanning results) 31 iwconfig sdr0 essid openwifi 32 ``` 33- Now the client is trying to associate with the AP. The AP board terminal should print like: 34 ``` 35 ... 36 sdr0: AP-STA-CONNECTED 66:55:44:33:22:58 37 sdr0: STA 66:55:44:33:22:58 RADIUS: starting accounting session 1FF1C1B4-00000001 38 ``` 39 If not, please adjust antenna/distance and re-run the commands on the client side. 40 41- After association is done, in the terminal of client: 42 ``` 43 dhclient sdr0 44 (Wait for it completed) 45 ifconfig sdr0 46 (Now you should see the IP address like 192.168.13.x allocated by AP) 47 ./set_csma_normal.sh 48 ping 192.168.13.1 49 (Ping the AP) 50 ``` 51 Now the communication link should be already setup between the AP and the client. 52