下载BH1750库

演示测试代码：

// Arduino and GY-302 module
#include <Wire.h>
#include <BH1750.h>
BH1750 GY302; // initialize BH1750 object
void setup() {
  Serial.begin(9600); // initialize serial
  GY302.begin(); // initialize GY-302 module
}
void loop() {
  // get reading from module
  uint16_t lux = GY302.readLightLevel();
  // display to Serial Monitor
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  // pause for 1 second
  delay(1000);
}

参考文章：

• Using GY-302 Digital Light Intensity Sensor Module with Arduino
• How to Use the GY-302 BH1750 Light Intensity Sensor with Arduino