DLight Unit
Description
DLight Unit is a Digital Ambient Light Sensor. Adopts BH1750FVI sensor (I2C interface), integrates 16-bit ADC, supports wide-range LUX and high resolution (1 - 65535 LX). Compact in size, and low power consumption. Suitable for various light sensing applications.
Product Features
- Support I2C interface (addr: 0x23)
- Illumination digital conversion
- Support light source variations (incandescent, fluorescent, halogen, white LED, sunlight, etc)
- Wide Range LUX (1-65535 lx)
- HY2.0-4P interface
Include
- 1x DLight Unit
Applications
- Smart Factory
- Home Automation
- Ambient light Sensing Scenario
Specification
| Specifications | Parameters |
|---|---|
| Sensor Model | BH1750FVI |
| Illumination detection range | 1-65535 lx |
| Communication interface | I2C communication interface (addr: 0x23) |
| Typical peak sensitivity wavelength | 560nm |
| Working current | < 5V@143uA |
| AD conversion depth | 16bit |
| Net weight | 4.8g |
| Gross weight | 10g |
| Product Size | 32 * 24 * 8mm |
| Package Size | 93 * 138mm |
PinMap
- DLight Unit
| M5Core(PORT A) | G21 | G22 | 5V | GND |
|---|---|---|---|---|
| DLight Unit | SDA | SCL | VCC | GND |
Schematic
Related Link
- Datasheet
Example
Arduino
- M5-DLight Libray
- Unit DLight - M5Atom
- Unit DLight - M5Core
- Unit DLight - M5Core2
- Unit DLight - M5StickC
- Unit DLight - M5StickCPlus
UIFlow
UIFlow Functions
Read:
- read lux value
Write:
- control state
- Power Down
No active state. - Power Up
Waiting for measurement command. - Reset
Reset Data register value.
- Power Down
- continuous mode
- H-Res1
- H-Res2
- L-Res
- one shot mode
- H-Res1
- H-Res2
- L-Res
About resolution
Refer to datasheet for details.
| Mode | Measurement Time | Resolution |
|---|---|---|
| H-Res1 | Typ. 120ms | 1 lx |
| H-Res2 | Typ. 120ms | 0.5 lx |
| L-Res | Typ. 16ms | 4 lx |
Video
Illumination value detection
FAQ:
What is the difference between a digital ambient light sensor and a photointensity detection sensor? (Can the brightness of the computer monitor be measured?) )
Illuminance:refers to how much light I get somewhere, and his unit of measurement is lux.Brightness:The brightness of the recognition seen by the human eye. The unit of measurement is candela per square meter (cd/㎡).Illuminance and brightness， one refers to how much light is obtained per unit area, and the other refers to how bright it looks per unit area.- Brightness is related to reflectivity, and the reflectivity of the palm of the hand is not the same, resulting in the difference between brightness and darkness.
So the output of the digital ambient light sensor is the amount of light; The light source can be: incandescent lamp, fluorescent lamp, halogen lamp, white LED, sunlight；The output of the photosensitive intensity detection sensor is the analog value of the brightness of the light; It can be divided into ultraviolet photoresistors, infrared photoresistors, visible photoresistors, here our sensor is visible light photointensity detection sensor。