WARNING! If using this library with esp8266 change SPI mode to 3 since arduino core for esp8266 has an error in SPI.cpp or do this:esp8266/Arduino#2416
Interfaces with ADE7753 single phase energy meter IC.
###Reads:
*Voltage
*Current
*Frequency
*Energy
*Real power
*Reactive power
*Apparent power
*IC temperature