1<!-- 2Author: Xianjun jiao 3SPDX-FileCopyrightText: 2019 UGent 4SPDX-License-Identifier: AGPL-3.0-or-later 5--> 6 7**NOTE** the terminal session mentioned in the following text can also be setup via USB-UART instead of Ethernet. 8 9- 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. 10- 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: 11 ``` 12 ssh [email protected] 13 (password: openwifi) 14 service network-manager stop 15 cd openwifi 16 ./wgd.sh 17 (Wait for the script completed) 18 ifconfig sdr0 up 19 ./sdr-ad-hoc-up.sh sdr0 44 192.168.13.1 20 (Above command setup ad-hoc network at channel 44 with static IP assigned to sdr0 NIC) 21 iwconfig sdr0 22 ``` 23- You should see output like: 24 ``` 25 sdr0 IEEE 802.11 ESSID:"sdr-ad-hoc" 26 Mode:Ad-Hoc Frequency:5.22 GHz Cell: 92:CA:14:27:1E:B0 27 Tx-Power=20 dBm 28 Retry short limit:7 RTS thr:off Fragment thr:off 29 Encryption key:off 30 Power Management:off 31 ``` 32 If you see "Cell: Not-Associated", please wait and run "iwconfig sdr0" again until a randomly generated Cell ID appears. 33 34- 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: 35 ``` 36 ssh [email protected] 37 (password: openwifi) 38 service network-manager stop 39 cd openwifi 40 ./wgd.sh 41 ifconfig sdr0 up 42 ./sdr-ad-hoc-up.sh sdr0 44 192.168.13.2 43 iwconfig sdr0 44 ``` 45- You should see output like: 46 ``` 47 sdr0 IEEE 802.11 ESSID:"sdr-ad-hoc" 48 Mode:Ad-Hoc Frequency:5.22 GHz Cell: 92:CA:14:27:1E:B0 49 Tx-Power=20 dBm 50 Retry short limit:7 RTS thr:off Fragment thr:off 51 Encryption key:off 52 Power Management:off 53 ``` 54 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. 55 56 Now the communication link should be already setup between the two ad-hoc nodes, and you can ping each other. 57