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BH1750.h
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BH1750.h
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/*
This is a library for the BH1750FVI Digital Light Sensor
breakout board.
The board uses I2C for communication. 2 pins are required to
interface to the device.
Datasheet: http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1750fvi-e.pdf
Written by Christopher Laws, March, 2013.
*/
#ifndef BH1750_h
#define BH1750_h
#if (ARDUINO >= 100)
#include <Arduino.h>
#else
#include <WProgram.h>
#endif
#include "Wire.h"
// Uncomment, to enable debug messages
// #define BH1750_DEBUG
// No active state
#define BH1750_POWER_DOWN 0x00
// Wating for measurment command
#define BH1750_POWER_ON 0x01
// Reset data register value - not accepted in POWER_DOWN mode
#define BH1750_RESET 0x07
// Start measurement at 1lx resolution. Measurement time is approx 120ms.
#define BH1750_CONTINUOUS_HIGH_RES_MODE 0x10
// Start measurement at 0.5lx resolution. Measurement time is approx 120ms.
#define BH1750_CONTINUOUS_HIGH_RES_MODE_2 0x11
// Start measurement at 4lx resolution. Measurement time is approx 16ms.
#define BH1750_CONTINUOUS_LOW_RES_MODE 0x13
// Start measurement at 1lx resolution. Measurement time is approx 120ms.
// Device is automatically set to Power Down after measurement.
#define BH1750_ONE_TIME_HIGH_RES_MODE 0x20
// Start measurement at 0.5lx resolution. Measurement time is approx 120ms.
// Device is automatically set to Power Down after measurement.
#define BH1750_ONE_TIME_HIGH_RES_MODE_2 0x21
// Start measurement at 1lx resolution. Measurement time is approx 120ms.
// Device is automatically set to Power Down after measurement.
#define BH1750_ONE_TIME_LOW_RES_MODE 0x23
class BH1750 {
public:
BH1750 (byte addr = 0x23);
void begin (uint8_t mode = BH1750_CONTINUOUS_HIGH_RES_MODE);
void configure (uint8_t mode);
uint16_t readLightLevel(void);
private:
int BH1750_I2CADDR;
};
#endif