M5Stack DLight (U136) – light sensor for Home Assistant (BH1750)

The DLight measures how bright it is in the room, in lux. It is the basis for one of the most common Home Assistant automations: switch on the lights when dusk falls, or lower the blinds when the sun is out.

The sensor is digital (BH1750) and gives a ready lux value, with no calibration needed, unlike a simple photoresistor.

Works with

• ESPHome (component bh1750)
• Home Assistant via ESPHome
• All M5Stack controllers with a Grove port

You also need

A controller, for example the AtomS3 Lite. Grove cable included.

Specifications

• Sensor: ROHM BH1750FVI
• Range: 1–65,535 lux
• Interface: I2C via Grove, address 0x23

Manufacturer and documentation

Manufacturer: M5Stack Technology Co., Ltd, Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China, [email protected]. EU representative: Success Courier SL, Calle Rio Tormes 1, Planta 1, Derecha, Oficina 3, 28947 Fuenlabrada, Madrid, Spain, [email protected].

• Product documentation (M5Stack)
• Manufacturer certifications (CE/RoHS)

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