how multiple bh1750 by 4 sensor??

Hi evrey one

i can not multiple bh1750 by 4 sensor.please help me..



i can multiple bh1750 by 2 sensor.the code multiple bh1750 by 2 sensor:





#include <Wire.h> //BH1750 IIC Mode
#include <math.h>
int Sen1 = 0x23; //setting i2c address
int Sen2 = 0x5C;

byte buff[2];

void setup()
{
Wire.begin();
Serial.begin(57600);//init Serail band rate
}

void loop()
{
int i;
uint16_t val1=0, val2=0;

BH1750_Init(Sen1);
delay(200);

if(2==BH1750_Read(Sen1))
{
val1=((buff[0]<<|buff[1])/1.2;
Serial.print(val1,DEC);
Serial.println("[lx]");
}
delay(200);

if(2==BH1750_Read(Sen2))
{
val2=((buff[0]<<|buff[1])/1.2;
Serial.print(val2,DEC);
Serial.printl("[lx]");
}
delay(200);
}

int BH1750_Read(int address) //
{
int i=0;
Wire.beginTransmission(address);
Wire.requestFrom(address, 2);
while(Wire.available()) //
{
buff = Wire.read(); // receive one byte
i++;
}
Wire.endTransmission();
return i;
}

void BH1750_Init(int address)
{
Wire.beginTransmission(address);
Wire.write(0x10);//1lx reolution 120ms
Wire.endTransmission();
}