/*
  This is a simple code to test BH1750FVI Light senosr
  communicate using I2C Protocol 
  this library enable 2 slave device address
  Main address  0x23 
  secondary address 0x5C 
  connect this sensor as following :
  VCC >>> 3.3V
  SDA >>> A4 
  SCL >>> A5
  addr >> A3
  Gnd >>>Gnd

  Written By : Mohannad Rawashdeh
  
 */
 
 // First define the library :
 #include <BH1750FVI.h> // Sensor Library
 #include <Wire.h> // I2C Library
 
 uint16_t Light_Intensity=0;
 // Call the function 
 #define LedPin 9 // led connecting to pin D9
 BH1750FVI LightSensor;

 int SensorValue =0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
 //  call begin Function so turn the sensor On .
  LightSensor.begin();
 /*
 Set the address for this sensor 
 you can use 2 different address
 Device_Address_H "0x5C"
 Device_Address_L "0x23"
 you must connect Addr pin to A3 .
 */
  LightSensor.SetAddress(Device_Address_H); //Address 0x5C
 // To adjust the slave on other address , uncomment this line
 // lightMeter.SetAddress(Device_Address_L); //Address 0x5C
 //-----------------------------------------------
   /*
   set the Working Mode for this sensor 
   Select the following Mode:
    Continuous_H_resolution_Mode
    Continuous_H_resolution_Mode2
    Continuous_L_resolution_Mode
    OneTime_H_resolution_Mode
    OneTime_H_resolution_Mode2
    OneTime_L_resolution_Mode
    
    The data sheet recommanded To use Continuous_H_resolution_Mode
  */
  LightSensor.SetMode(Continuous_H_resolution_Mode);
  pinMode(9,OUTPUT) // Connect LED With 100ohm resistor
  // to pin D9
  
  
}

void loop() {
  // put your main code here, to run repeatedly: 
  // call GetLightIntensity() Function , so the sensor read
  //the Intensity Value and send it 
  Light_Intensity=LightSensor.GetLightIntensity();
  delay(50);
 
  SensorValue=map(Light_Intensity,0,2000,255,0);
  SensorValue=constrain(SensorValue,255,0);
  digitalWrite(LedPin,SensorValue);
  // ready to another reading . 
}