The BH1750 sensor is a digital Light Sensor capable of measuring light intensity with a great degree of accuracy and over a large range. It communicates with microcontrollers or processors to which it is connected via the I2C bus interface. This module is the most suitable to obtain the ambient light data and it is commonly used for adjusting LCD and Keypad backlight power of Mobile phones.

Some of the features of this sensor include;

1. I2C bus Interface ( f / s Mode Support )
2. Spectral responsibility is approximately human eye response
3. Illuminance to Digital Converter
4. Wide range and High resolution. ( 1 – 65535 lx )
5. Low Current by power down function
6. 50Hz / 60Hz Light noise reject-function
7. It is possible to select 2 type of I2C slave-address.
8. Adjustable measurement result for influence of optical window ( It is possible to detect min. 0.11 lx, max. 100000 lx by using this function. )
9.  Small measurement variation (+/- 20%)