BH1750 Light Intensity Detection Sensor

  The BH1750 sensor uses the original ROHM BH1750FVI chip and operates with a power supply of 3-5V. It has a light intensity range of 0-65535 lux. The sensor includes a 16-bit ADC (Analog-to-Digital Converter) for direct digital output, eliminating the need for complex calculations and calibration. It is designed with spectral characteristics close to human visual sensitivity, allowing for precise measurement of a wide range of brightness with 1 lux accuracy. The sensor uses the standard NXP I2C communication protocol and contains built-in level shifting for direct connection to 5V microcontroller I/O pins.

Module Source

Purchase Link:
https://detail.tmall.com/item.htm?_u=52t4uge534a7&id=598334245306&spm=a1z09.2.0.0.47582e8dxs1caw
Baidu Netdisk Download Link:
https://pan.baidu.com/s/13bVmmj0eM22mT8pBusjIyQ?pwd=8889
Password: 8889

Specifications

Operating Voltage: 3-5V
Operating Current: 200uA
Detection Range: 1~65536 lx
Module Dimensions: 32.6mm×15.2mm×11.6mm
Output Method: IIC
Pin Count: 5 Pin

Hardware Interface

• Connect the VCC pin of BH1750 to the 3.3V output of the development board.
• Connect the GND pin to the GND of the development board.
• Connect the SDA pin to the A4 pin (SDA) of the development board.
• Connect the SCL pin to the A5 pin (SCL) of the development board.

Instructions for Use

Install Library

  The BH1750 communicates with Arduino via I2C. A third-party library can be used to simplify interaction with the BH1750. You can install a BH1750 library through the Arduino IDE's library manager.

Steps to install:

1. Open the Arduino IDE.
2. Go to "Tools" > "Manage Libraries..."
3. In the search bar, type "BH1750."
4. Find the BH1750 library and install it.

Enter the code:

/******************************************************************************
  * Test Hardware: LCSC ColorEasyDuino Development Board
  * Version Number: V1.0
  * Modified By: www.lckfb.com
  * Modification Date: April 10, 2024
  * Function Overview:
  *****************************************************************************
  * Open-source development board hardware and software information and related projects hardware and software information on official website
  * Development board official website: www.lckfb.com
  * Technical support resident forum, any technical problems are welcome at any time to exchange learning
  * LCSC Forum: club.szlcsc.com
  * Follow our Bilibili account: [立创开发板], stay toned to our latest news!
  * We focus on cultivating Chinese engineers rather than profiting from board sales.
******************************************************************************/
#include <Wire.h>
#include <BH1750.h>

BH1750 lightMeter;

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

  if (lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
    Serial.println(F("BH1750 Test begin!"));
  } else {
    Serial.println(F("Error initialising BH1750"));
  }
}

void loop() {
  float lux = lightMeter.readLightLevel();  // 读取当前光照强度（单位：勒克斯）
  Serial.print("Light: ");
  Serial.print(lux);
  Serial.println(" lx");
  delay(1000); // 延迟时间可以根据需要进行调整
}

Usage Testing