// Simple Version with BH1750.h
//////////////////////////////////////////////////////////////////
/////////////////////////////////////
/////////////////////
///////////
//Quelle: https://randomnerdtutorials.com/arduino-bh1750-ambient-light-sensor/
#include <BH1750.h>
#include <Wire.h>

BH1750 lightMeter;

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

  // Initialize the I2C bus (BH1750 library doesn't do this automatically)
  Wire.begin();
  // On esp8266 you can select SCL and SDA pins using Wire.begin(D4, D3);
  // For Wemos / Lolin D1 Mini Pro and the Ambient Light shield use
  // Wire.begin(D2, D1);

  lightMeter.begin();

  Serial.println(F("BH1750 Test begin"));
}

void loop() {
  float lux = lightMeter.readLightLevel();
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  delay(1000);
}










// Function (readLightLevel)
//////////////////////////////////////////////////////////////////
/////////////////////////////////////
/////////////////////
///////////
// Quelle: https://codebender.cc/library/BH1750#BH1750.cpp
uint16_t BH1750::readLightLevel(void) {

  uint16_t level;

  Wire.beginTransmission(BH1750_I2CADDR);
  Wire.requestFrom(BH1750_I2CADDR, 2);
#if (ARDUINO >= 100)
  level = Wire.read();
  level <<= 8;
  level |= Wire.read();
#else
  level = Wire.receive();
  level <<= 8;
  level |= Wire.receive();
#endif
  Wire.endTransmission();

#if BH1750_DEBUG == 1
  Serial.print("Raw light level: ");
  Serial.println(level);
#endif

  level = level/1.2; // convert to lux

#if BH1750_DEBUG == 1
  Serial.print("Light level: ");
  Serial.println(level);
#endif
  return level;
}










///////////// THIS ///////////// THIS ///////////// THIS ///////////// 

#include <Wire.h>

void setup() {
  Serial.begin(9600);  // Start serial for output
  Wire.begin();        // Join I2C bus (address is optional for controller device)
  
}

void loop() {
  float lux = Get_B();
  print("Light: ");
  print(lux);
  println(" lx");
  delay(500);

}

float Get_B (void) {
  float temp, msb, lsb;
  Wire.beginTransmission(0b0100011);  // Transmit to device address (0b0100011)     **
  Wire.requestFrom(0b0100011, 6);     // From peripheral device(address) request 6 bytes   **

  // Peripheral may send less than requested
  while (Wire.available()) {
    byte val = Wire.read();     // Receive a byte as character
  }
  Serial.println(val);        // Print byte
  Wire.endTransmission();    // Stop transmitting
  temp = (msb * 256 + lsb ) / 1.2;
  return temp;
}