- 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)
iwconfig sdr0 essid openwifi
```
- Now the client is trying to associate with the AP. The AP board terminal should print like:
```
...
sdr0: AP-STA-CONNECTED 66:55:44:33:22:58
sdr0: STA 66:55:44:33:22:58 RADIUS: starting accounting session 1FF1C1B4-00000001
```
If not, please adjust antenna/distance and re-run the commands on the client side.
- After association is done, in the terminal of client:
```
dhclient sdr0
(Wait for it completed)
ifconfig sdr0
(Now you should see the IP address like 192.168.13.x allocated by AP)
./set_csma_normal.sh
ping 192.168.13.1
(Ping the AP)
```
Now the communication link should be already setup between the AP and the client.
