One problem about the CSI extractor

[18563407351]

I noticed that when collecting CSI, the raspberry pi cannot connect to wi-fi. So how does it realize the collection of CSI without connecting to WI-FI? And does this mean that the raspberry pi cannot send data packets to another raspberry pi through Wi-Fi during collecting CSI in the wireless channel?

[zeroby0]

That's correct.

Your raspberry pi does not connect to any WiFi. Instead, it just listens to all packets going in the channel you configured.

It's very similar to monitor mode; instead of collecting packets, we collect CSI data. And yes, the Raspberry Pi cannot send data packets through the inbuilt WiFi chip. You can use a WiFi adapter on your raspberry pi to send wifi packets (not recommended. See #42) or use another Raspberry Pi or a different device.

Read this paper for a deeper understanding of how the tool works: Free your CSI