Full tutorial and live demo: http://www.pubnub.com/blog/building-an-iot-coffee-maker-with-realtime-capacity-monitoring/
The IoT connected coffee pot that streams coffee volume in the pot to a live-updating web interface. The coffee pot uses a basic scale with an LCD screen to collect the data, and the Atmel ATmega328p microcontroller and ESP8266 as the brains.
Data is streamed via PubNub, and displayed on the UI using the EON JavaScript framework.