ESP8266 Community Forum

- Sun Jan 10, 2016 6:44 pm #38462

The above link provided scan for connected stations, right !
Similar scan for APs is already provided by SDK.
But, scanning unconnected stations is impossible since they don't broadcast their MAC.

Any idea how Android gets this info? See pix

1452468907527.png

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- Sun Jan 10, 2016 7:09 pm #38464

Any idea how Android gets this info? See pix

1452468907527.png

I don't know about that app and all the items in the screenshot look like APs, not clients, but technically it is possible to track some WIFI - clients nearby by setting the WIFI - device into monitor - mode, then just waiting patiently as clients make requests for APs. There are a few caveats, though: you can't actively scan for clients, you can only passively listen for these probes and only then will you know that there is a client, and not all clients send probes -- some just wait passively for APs to broadcast themselves, and thus you have no way of seeing these clients at all.

I have no idea if it is possible to do this with the ESP at all.

- Sun Jan 10, 2016 7:17 pm #38465 Actually, I'll correct myself: it is possible to use the ESP8266 in monitor/promiscuous mode -- see http://bbs.espressif.com/download/file.php?id=572 for details.

- Sun Jan 10, 2016 7:37 pm #38467

all the items in the screenshot look like APs, not clients,

Silly me, of course you are right. Must be past my bedtime!... 19:35
Old neurons need a recharge

Thx. And good link to promiscuous mode.

Ray