This application is a proof of concept for probe request capture, logging and display.
Data displayed on this site was captured from a portable device in a tree in my front yard.
I live on a busy street, so I'm seeing about 2500 unique devices per day.

Agent

• TP-Link TL-MR3040 portable router in sta mode connected to local wifi
• OpenWRT Chaos Calmer 15.05.1
• 4 port USB hub since the router only has 1 USB port
• Ralink RT5370 USB wifi adapter in monitor mode
• 16Gb USB Dongle filesystem overlay
• 16500 mAh Battery i have two of these and I swap them every 12 hours or so
• tcpdump -l -i wlan0 -tttt -e -s 256 type mgt subtype probe-req
• curl -X POST -d "$line" "http://probe.hky.me/etc..."

Server

• Centos 6 VPS on Digital Ocean
• NodeJS 400 lines of really simple Express
• MySQL 5 tables

Client

• Javascript Vanilla JS w/ some AJAX, this is a prototype. Don't judge me.
• HTML 5
• CSS

This data was "live" in the sense that it was being continually fed from the agent to the server.

If you refresh this page, you will get the same results because this side project ran 8 years ago.