A quick and dirty utility I knocked up to help find the IP my TP-Link TL-WPA4220 is using. It seems to pick a random IP from 192.168.0.2-255 when it starts up.
This assumes there's nothing else on the network running on port 80. It prints the first IP it finds that responds with 200 - OK or 401 - Unauthorized, then exits.
Run node index.js to use.