1*a6085186SLina Ceballos<!-- 2*a6085186SLina CeballosSPDX-FileCopyrightText: 2019 Jiao Xianjun <[email protected]> 3*a6085186SLina CeballosSPDX-License-Identifier: AGPL-3.0-or-later 4*a6085186SLina Ceballos--> 5*a6085186SLina Ceballos 6*a6085186SLina Ceballos 79c1c62f1SXianjun Jiao- Power on two SDR boards. Call one board "adhoc1" and the other "adhoc2". 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. 89c1c62f1SXianjun Jiao- Connect a computer to the adhoc1 via Ethernet cable. The computer should have static IP 192.168.10.1. Open a terminal on the computer, and then in the terminal: 99c1c62f1SXianjun Jiao ``` 109c1c62f1SXianjun Jiao ssh [email protected] 119c1c62f1SXianjun Jiao (password: openwifi) 129c1c62f1SXianjun Jiao service network-manager stop 139c1c62f1SXianjun Jiao cd openwifi 149c1c62f1SXianjun Jiao ./wgd.sh 159c1c62f1SXianjun Jiao (Wait for the script completed) 169c1c62f1SXianjun Jiao ifconfig sdr0 up 179c1c62f1SXianjun Jiao ./sdr-ad-hoc-up.sh sdr0 44 192.168.13.1 189c1c62f1SXianjun Jiao (Above command setup ad-hoc network at channel 44 with static IP assigned to sdr0 NIC) 199c1c62f1SXianjun Jiao iwconfig sdr0 209c1c62f1SXianjun Jiao ``` 219c1c62f1SXianjun Jiao- You shold see output like: 229c1c62f1SXianjun Jiao ``` 239c1c62f1SXianjun Jiao sdr0 IEEE 802.11 ESSID:"sdr-ad-hoc" 249c1c62f1SXianjun Jiao Mode:Ad-Hoc Frequency:5.22 GHz Cell: 92:CA:14:27:1E:B0 259c1c62f1SXianjun Jiao Tx-Power=20 dBm 269c1c62f1SXianjun Jiao Retry short limit:7 RTS thr:off Fragment thr:off 279c1c62f1SXianjun Jiao Encryption key:off 289c1c62f1SXianjun Jiao Power Management:off 299c1c62f1SXianjun Jiao ``` 309c1c62f1SXianjun Jiao If you see "Cell: Not-Associated", please wait and run "iwconfig sdr0" again until a randomly generated Cell ID appears. 319c1c62f1SXianjun Jiao 329c1c62f1SXianjun Jiao- Connect another computer to the adhoc2 via Ethernet cable. The computer should have static IP 192.168.10.1. Open a terminal on the computer, and then in the terminal: 339c1c62f1SXianjun Jiao ``` 349c1c62f1SXianjun Jiao ssh [email protected] 359c1c62f1SXianjun Jiao (password: openwifi) 369c1c62f1SXianjun Jiao service network-manager stop 379c1c62f1SXianjun Jiao cd openwifi 389c1c62f1SXianjun Jiao ./wgd.sh 399c1c62f1SXianjun Jiao ifconfig sdr0 up 409c1c62f1SXianjun Jiao ./sdr-ad-hoc-up.sh sdr0 44 192.168.13.1 419c1c62f1SXianjun Jiao iwconfig sdr0 429c1c62f1SXianjun Jiao ``` 439c1c62f1SXianjun Jiao- You shold see output like: 449c1c62f1SXianjun Jiao ``` 459c1c62f1SXianjun Jiao sdr0 IEEE 802.11 ESSID:"sdr-ad-hoc" 469c1c62f1SXianjun Jiao Mode:Ad-Hoc Frequency:5.22 GHz Cell: 92:CA:14:27:1E:B0 479c1c62f1SXianjun Jiao Tx-Power=20 dBm 489c1c62f1SXianjun Jiao Retry short limit:7 RTS thr:off Fragment thr:off 499c1c62f1SXianjun Jiao Encryption key:off 509c1c62f1SXianjun Jiao Power Management:off 519c1c62f1SXianjun Jiao ``` 529c1c62f1SXianjun Jiao The "Cell: 92:CA:14:27:1E:B0" should be the same as adhoc1, because the later joined node should discover the Cell ID of the existing network and join/get it automatically. If not, please adjust the antenna/distance and re-run the commands. 539c1c62f1SXianjun Jiao 549c1c62f1SXianjun Jiao Now the communication link should be already setup between the two ad-hoc nodes, and you can ping each other. 55