Mateusz Grzywacz / BH1750

Library for BH1750 I2C light sensor. Supports autoranging! True to datasheet. (beware: calls are blocking at the moment)

sample program

#include "mbed.h"

#include "BH1750.h"


I2C i2c(PB_9, PB_8); // SDA, SCL on Nucleo
BH1750 light(i2c, true); // ##true## means we want autoranging be active

Serial pc(USBTX, USBRX, 57600);

int main()
{
    light.power(true); // turn on
    light.setMtreg(BH1750::DEFAULTMTREG); // just to set defaults
    light.setMode(BH1750::CONTINOUS_H_RES_CMD);
    while (1) {
        float lux = light.read();
        pc.printf("luminosity: %.1f lx\r\n", lux);
        pc.printf("log(lx): %f\r\n\r\n", log10(lux + 1) /4.55 );
    }
}
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