GY-302 BH1750 光強度模塊-Arduino 庫

GY-302 BH1750 光強度模塊-Arduino庫，親測能用

#include <Wire.h> //IIC
#include <math.h>
int BH1750address = 0x23;
byte buff[2];

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

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("[lx]");
  }
  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();
}