Arduino Learning Diary-Using GY-30 light sensor

I. List of components

Arduino Pro Mini

GY-30

Second, the wiring

Using IIC communication mode, GY-30VCC connect +5v,gnd grounding. GY-30 SDA, SCL respectively A4, A5

Third, the source code

#include <Wire.h>//GY-30//BH1750FVI//In ADDR ' L ' mode 7bit ADDR #define ADDR 0b0100011//ADDR ' h ' mode//#de
  Fine ADDR 0b1011100 void Setup () {//Put your setup code here, to run Once:Serial.begin (9600); while (! Serial) {;//wait for Serial port to connect.
  Needed for Leonardo only} wire.begin ();
  Wire.begintransmission (ADDR);
  Wire.write (0b00000001);
Wire.endtransmission ();
  } void Loop () {//Put your main code here, to run repeatedly:int val = 0;
  Reset Wire.begintransmission (ADDR);
  Wire.write (0b00000111);
 
  Wire.endtransmission ();
  Wire.begintransmission (ADDR);
  Wire.write (0b00100000);
  Wire.endtransmission ();
  Typical read delay 120ms delay (120); Wire.requestfrom (ADDR, 2); 2byte every time for (val = 0; Wire.available () >= 1;
    ) {char c = wire.read ();
    Serial.println (c, HEX);
  val = (Val << 8) + (C & 0xFF);
  } val = val/1.2;
  Serial.print ("LX:");
  Serial.println (Val); Serial.printlN ("OK");
Delay (100); }