On: Warwalking WiFi Networks with ESP8266 IoT Module

[1024core]

I can't seem to find any info on the "sainrite water level sensor" ; could it be a typo?

[milge → 1024core]

Yes, sorry. This is the one I'm using: http://www.amazon.com/SainSmart-Sensitivity-Arduino-Mega2560...

Just search for analog water sensor and you'll see a few like this labeled by different companies. There are some that are probably cheaper.