BH1750.md

BH1750 ambient light sensor

??? tip "This feature is included only in tasmota32 and tasmota-sensors binaries"

When [compiling your build](Compile-your-build) add the following to `user_config_override.h`:
```c++
#ifndef USE_BH1750
#define USE_BH1750      // [I2cDriver11] Enable BH1750 sensor (I2C address 0x23 or 0x5C) (+0k5 code)
#endif
```

The BH1750 is a digital ambient light sensor module which uses I²C to communicate. The BH1750 provides you with a digital value in lux (Lx) over a range of 1 - 65535 lx. See datasheet for more information.

Configuration

Wiring

BH1750	ESP
GND	GND
VCC	3.3V
SDA	GPIOx
SCL	GPIOy

Tasmota Settings

In the Configuration -> Configure Module page assign:

1. GPIOx to I2C SDA
2. GPIOy to I2C SCL

After a reboot the driver will detect BH1750 automatically and display Illuminance.

Sensor sends a tele/%topic%/SENSOR JSON response:

{"Time":"2019-11-03T20:45:37","BH1750":{"Illuminance":79}}

Commands

Command	Parameters
Bh1750Resolution	resolution mode. x = sensor number (1..2) 0..2 = choose sensor resolution (0 = high (default), 1 = high2, 2 = low)
Bh1750MTime	Measurement Time value. x = sensor number (1..2) 31..254 = set measurement time (default = 69)

Breakout Boards