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seemoo-lab / nexmon_csi

Channel State Information Extraction on Various Broadcom Wi-Fi Chips
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How to configure two Asus routers #327

Closed sarielkk closed 11 months ago

sarielkk commented 11 months ago

Hello author, thank you for your work. I want to use two Asus AC86U routers to collect CSI. My idea is for one router to be connected to the network as Tx, and the other router to be configured as Rx according to this project. The two are set up in the same frequency band and channel, and connected to the computer through a LAN port using a network cable at Rx. May I ask if my understanding is correct?

When I use the command "nexutil -Iwlan0 -s500 -b -l34 -vm+IBEQGIAgAAESIzRFWqu6q7qrsAAAAAAAAAAAAAAAAAAA==", I got "nexutil: cannot find command". Do you know what the reason is？

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jlinktu commented 11 months ago

If you followed the README then nexutil is placed at /jffs/nexutil. And if you did not put that location to your PATH environment variable you have to provide the location to call it: /jffs/nexutil ...

jlinktu commented 11 months ago

However, the example command you provided will not work as there is no interface called wlan0 on the Asus RT-AC86U. The interfaces are called eth5 for 2.4 GHz and eth6 for 5Ghz. Edit: Just saw that you correctly used eth6 in the command in the screenshot.

sarielkk commented 11 months ago

If you followed the README then nexutil is placed at /jffs/nexutil. And if you did not put that location to your PATH environment variable you have to provide the location to call it: /jffs/nexutil ...

Thank you for your reply. When I use /jffs/nexutil ... , I can run it successfully. I have another question. I want to use two ASUS routers to capture CSI, should I configure Tx according to nexmon_tx_task , and configure Rx according to nexmon_csi ?

sarielkk commented 11 months ago

Additionally, I am using one router as Tx and the other ASUS router based on Nexmon_CSI as RX. I connected the LAN port of RX to my laptop using a network cable, and ping tx with ping 192.168.1.1 -i 0.1 , but I was unable to receive CSI data. Am I missing any steps?

Should I use PC1 to connect Tx and PC2 to connect Rx for capture CSI？

333

jlinktu commented 11 months ago

If you followed the README then nexutil is placed at /jffs/nexutil. And if you did not put that location to your PATH environment variable you have to provide the location to call it: /jffs/nexutil ...

Thank you for your reply. When I use /jffs/nexutil ... , I can run it successfully. I have another question. I want to use two ASUS routers to capture CSI, should I configure Tx according to nexmon_tx_task , and configure Rx according to nexmon_csi ?

Yes, that is one of many possible setups.

jlinktu commented 11 months ago

Additionally, I am using one router as Tx and the other ASUS router based on Nexmon_CSI as RX. I connected the LAN port of RX to my laptop using a network cable, and ping tx with ping 192.168.1.1 -i 0.1 , but I was unable to receive CSI data. Am I missing any steps?

Should I use PC1 to connect Tx and PC2 to connect Rx for capture CSI？

333

If you use nexmon_tx_task there is no need to ping.

Also I advise against using ping as a traffic generator in general. If you do not want to inject frames with nexmon_tx_task but generate traffic on tcpip level I suggest using iperf.

Not capturing any CSI UDPs can have many reasons, usually this is due to misconfiguration. Also check out the FAQ.

sarielkk commented 11 months ago

Additionally, I am using one router as Tx and the other ASUS router based on Nexmon_CSI as RX. I connected the LAN port of RX to my laptop using a network cable, and ping tx with ping 192.168.1.1 -i 0.1 , but I was unable to receive CSI data. Am I missing any steps? Should I use PC1 to connect Tx and PC2 to connect Rx for capture CSI？ 333

If you use nexmon_tx_task there is no need to ping.

Also I advise against using ping as a traffic generator in general. If you do not want to inject frames with nexmon_tx_task but generate traffic on tcpip level I suggest using iperf.

Not capturing any CSI UDPs can have many reasons, usually this is due to misconfiguration. Also check out the FAQ.

Thank you very much for your help！ I found that I was able to successfully collect CSI, I just had to wait for a while. The collection of two routers is not like the router and nexus5, which can display got0，got10，got20...