BH1750 Light Sensor

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Eric
Posts: 165
Joined: Fri Feb 21, 2014 4:52 pm

BH1750 Light Sensor

Post by Eric » Tue May 06, 2014 6:29 pm

I was sent a sample BH1750 light sensor by ICstation so I thought I would share the code and instruction how I got it working. The full video is on my YouTube channel.

I found the initial code and library here:

http://www.instructables.com/id/BH1750- ... ht-Sensor/

https://github.com/Genotronex/BH1750FVI_Master

Once you have downloaded the library just open the Arduino IDE and the example code will be there for the basic examples. I went ahead and modded the eample code for my Nokia 5110 LCD display. Here is the code to make your own with LCD :)

Take the code, make it better!

Cheers
/*

This code is for the BHT1750 Light Sensor (provided to me by ICstation.com)

This is a work in progress but hopefully it will help someone else by providing
a base to start and work from.

Please check out my Youtube videos here and consider a thumbs up if this helped you!
Youtube : http://www.youtube.com/user/Shadow5549

Website, Forum and store are at http://mkme.org

I2C Connections:
SDA connected to pin Analog 4
SCL connected to pin Analog 5
 addr >> A3
 Gnd >>>Gnd
Pin 11 for contrast on the Nokia 5110
*/


#include "Adafruit_GFX.h"
#include "Adafruit_PCD8544.h"
Adafruit_PCD8544 display = Adafruit_PCD8544(7, 6, 5, 4, 3);//4 and 3 are reversed on the cheap eBay models
#include <BH1750FVI.h> // Sensor Library
#include <Wire.h> // I2C Library
uint16_t Light_Intensity=0;
BH1750FVI LightSensor;

void setup() {
  
  Serial.begin(9600);
  analogWrite(11,220);// PWM of LCD backlight but ebay unit is backwards-
  //must go high + cycle to dim
  //Very Dim=230
  LightSensor.begin();
  LightSensor.SetAddress(Device_Address_H); //Address 0x5C
  LightSensor.SetMode(Continuous_H_resolution_Mode);
  Serial.println("Running...");
  
  
  display.begin();//Display code
  display.setContrast(50);//Nokia 5110 works best at 50- no more flicker
  delay(1000);
  display.clearDisplay(); // clears the screen and buffer
  display.setTextSize(1); // set text size
  display.setTextColor(BLACK);
  //delay(1000);
  
  
   // Splash Personal- taken from example code
  display.setTextSize(1);
  display.setTextColor(BLACK);
  display.setCursor(0,0);
  display.println(" Eric's");
  display.println("");
  display.println(" BH1750");
  display.println(" Light");
  display.println(" Sensor");
  display.display();
  delay(2000);
  display.clearDisplay(); // clears the screen and buffer
 
}

void loop() {
    
  display.clearDisplay(); // clears the screen and buffer
  display.setCursor(0,0);
    display.println(" Intensity = ");
  //display.setCursor(5, 1);
  display.println ("");
  Light_Intensity = LightSensor.GetLightIntensity();
  display.setTextSize(2); // set text size
  display.println(Light_Intensity);
  display.setTextSize(1);

  Serial.print (Light_Intensity);//for troubleshooting
  display.println(" Lux");
  display.display();
  //delay(2000);
}
    
  
   
I make videos and content on all things electronics, 3D prining and "Maker"
http://www.mkme.org
https://www.youtube.com/mkmeorg

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