Now in this section we will explain how to control and monitor your current consumption when the light is on or off. Using your Arduino Wi-Fi shield from a web page, we will monitor this variable. When the light is off it looks as follows:

When the light is on it looks as follows:

You can now either copy the code inside a file called Controlling_lights_Current_Consumption.ino, or just get the complete code from the folder of this book.

Define variables and functions to monitor and control:

#define NUMBER_VARIABLES 2 
#define NUMBER_FUNCTIONS 1 

Import libraries to use:

#include <Adafruit_CC3000.h> 
#include <SPI.h> 
#include <CC3000_MDNS.h> 
#include <aREST.h> 

Configure the relay to activate:

const int relay_pin = 8; 

Variables to calculate the current:

float amplitude_current; 
float effective_value; 
float effective_voltage = 110; 
float effective_power; 
float...