Arduino学习日记-使用GY-30光照传感器

一、元器件清单

Arduino Pro Mini

GY-30

 

二、接线

采用IIC通讯方式，GY-30VCC接+5V，GND接地。GY-30 SDA 、SCL分别接A4、 A5

 

三、源代码

#include <Wire.h>
// GY-30
// BH1750FVI
// in ADDR 'L' mode 7bit addr
#define ADDR 0b0100011
// addr 'H' mode
// #define 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);
}