http://www.esp8266-projects.com/2016/...
Part4 of the SmartMon v2.7ex series - A real world example on how to monitor your power line and load, read Voltage/Current and Power consumtion data and upload them on the Thingspeak related Channel.
SmartMon v2.7Ex is available also on Tindie Store : https://www.tindie.com/stores/nEXT_EVO1/