VEML7700

Connects over

I²C

Address

0x10

Made by

Vishay

Datasheet

vishay.com

Use it

hardware {
    device veml7700: VEML7700
}

every 1s {
    let value: float = veml7700.lux()
    log("veml7700", "lux={value}")
}

On its own, the declaration puts the VEML7700 on the first I²C bus (SDA 21, SCL 22 on the ESP32) at 0x10. To choose the pins or the address, declare the bus and attach the device: device veml7700: VEML7700 on i2c0 at 0x10 with i2c i2c0(sda: 21, scl: 22).

Methods

• veml7700.lux() -> float

  Light in lux (corrected)

• veml7700.white() -> float

  White channel

Wiring

Specifications

Voltage

2.5V – 3.6V

Current

45 μA

Range

0 – 120k lux

Resolution

0.0036 lux/count at default gain

Interface speed

I²C up to 400 kHz

Tips

• Wider dynamic range than BH1750 — better for both very dim and very bright environments.
• Configurable gain + integration time trades sensitivity for sample rate.
• Optical filter approximates the human eye's response (photopic).

Alternatives worth knowing:

• BH1750: Cheaper, narrower range, simpler protocol.
• TSL2591: Even wider range; two diodes for IR rejection.