project: VL6180X + BH1750: Dual I2C sensors

  
#include <Wire.h>
#include <VL6180X.h>
#include <math.h>

int BH1750address = 0x23; //i2c address

byte buff[2];

VL6180X sensor;

void setup()
{
  Serial.begin(9600);
  Wire.begin();

  sensor.init();
  sensor.configureDefault();

  // Reduce range max convergence time and ALS integration
  // time to 30 ms and 50 ms, respectively, to allow 10 Hz
  // operation (as suggested by Table 6 ("Interleaved mode
  // limits (10 Hz operation)") in the datasheet).
  sensor.writeReg(VL6180X::SYSRANGE__MAX_CONVERGENCE_TIME, 30);
  sensor.writeReg16Bit(VL6180X::SYSALS__INTEGRATION_PERIOD, 50);

  sensor.setTimeout(500);

   // stop continuous mode if already active
  sensor.stopContinuous();
  // in case stopContinuous() triggered a single-shot
  // measurement, wait for it to complete
  delay(300);
  // start interleaved continuous mode with period of 100 ms
  sensor.startInterleavedContinuous(100);

}

void loop()
{
    int i;
  uint16_t val=0;
  BH1750_Init(BH1750address);
  delay(200);

  if(2==BH1750_Read(BH1750address))
  {
    val=((buff[0]<<8)|buff[1])/1.2;
    Serial.print(val,DEC);
    Serial.println(" luxus");
  }

  Serial.print("Ambient: ");
  Serial.print(sensor.readAmbientContinuous());
  if (sensor.timeoutOccurred()) { Serial.print(" TIMEOUT"); }

  Serial.print("\tRange: ");
  Serial.print(sensor.readRangeContinuousMillimeters());
  if (sensor.timeoutOccurred()) { Serial.print(" TIMEOUT"); }

  Serial.println();

  delay(150);
}

int BH1750_Read(int address) //
{
  int i=0;
  Wire.beginTransmission(address);
  Wire.requestFrom(address, 2);
  while(Wire.available()) //
  {
    buff[i] = 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();
}