Digital light intensity sensor operating in the range of 1 – 65535 Lux (Lux) with resolution of 1 lx or 4 lx depending on the selected mode of operation. It communicates through I2C  interface (TWI), that is, two lines: data – SDA and clock SCL. The module can be used to measure the light intensity both indoors and in the open space. The kit includes a goldpin connector for self-soldering.

Connecting the light sensor

The module has five pins:

The bottom side of the printed circuit board of the sensor BH1750.

• VCC – supply voltage: 3 V to 5 V.
• GND – ground of the system.
• SCL – the clock line of the I2C bus.
• SDA – data line of the I2C bus.
• ADD – address selection of the I2C bus, the indication of the low status sets the address to: 0100011, high: 1011100. The pin is by default in the low status.

Specification

• Supply voltage: 3 V to 5 V
• Average current consumption: 120 uA
• Communication interface: I2C
• Built-in resistors 4.7 kΩ pulling up the lines SCL and SDA of the I2C bus
• Built-in voltage regulator
• Range: 1 to 65535 lx
• Module dimensions: 21 x 16 x 3.3 mm