Ks0278 keyestudio BH1750FVI Digital Light Intensity Module
Keyestudio BH1750FVI Digital Light Intensity Module
Introduction
Keyestudio BH1750FVI digital light intensity module is a digital light intensity sensor integrated circuit used for two-wire serial bus interface. It uses the light intensity data collected by module to adjust the brightness of LCD and keyboard backlight. The module resolution can detect a wide range of light intensity changes.
Specification
- Diameter 26mm, large diameter 28.5mm, high 26mm (plus light ball)
- Working voltage: DC 5V
- Communication interface: IIC
- Input light range: 1-65535lx
- Spectral sensitivity: typical value of peak sensitivity wavelength: 560nm
- Weak dependency on light source: incandescent, fluorescent, halogen, white LED and fluorescent is available.
Connection Diagram
Sample Code
Get Library of Wire： [1]
/*
Measurement of illuminance using the BH1750FVI sensor module
Connection:
Module UNO
G <-----> GND
V <-----> 5V
SDA <-----> A4
SCL <-----> A5
*/
#include <Wire.h>
#define ADDRESS_BH1750FVI 0x23 //ADDR="L" for this module
#define ONE_TIME_H_RESOLUTION_MODE 0x20
//One Time H-Resolution Mode:
//Resolution = 1 lux
//Measurement time (max.) = 180ms
//Power down after each measurement
byte highByte = 0;
byte lowByte = 0;
unsigned int sensorOut = 0;
unsigned int illuminance = 0;
void setup()
{
Wire.begin();
Serial.begin(115200);
}
void loop()
{
Wire.beginTransmission(ADDRESS_BH1750FVI); //"notify" the matching device
Wire.write(ONE_TIME_H_RESOLUTION_MODE); //set operation mode
Wire.endTransmission();
delay(180);
Wire.requestFrom(ADDRESS_BH1750FVI, 2); //ask Arduino to read back 2 bytes from the sensor
highByte = Wire.read(); // get the high byte
lowByte = Wire.read(); // get the low byte
sensorOut = (highByte<<8)|lowByte;
illuminance = sensorOut/1.2;
Serial.print(illuminance); Serial.println(" lux");
delay(1000);
}
Test Result
For the light intensity, the value will make a corresponding change. The light is strong, the value is large; otherwise, the value is small. Open the serial monitor and set the baud rate of 115200, as the figure shown below:
Resource
Datasheet:
https://drive.google.com/open?id=1sJup2MWqVL8z_oTPvGZDG77a_qI22d5h
Get Library of Wire:
https://drive.google.com/open?id=1ps08N3Oc12y5St3HODk81w3NmUuBGL5-