6 of the 9 features in our table differ between the BH1750 and the VEML7700.
0.11 lx to 100,000 lx · I²C · 2.4 to 3.6 V
ROHM’s simple lux meter on I²C: 1 to 65,535 lx by default, and 0.11 to 100,000 lx when the driver adjusts the measurement time.
Watch out: Sunlight needs a shorter measurement time than the default: ESPHome sets it on its own; with another library, check that it does. The datasheet gives a ±20 % variation.
0.0042 lx to 140,000 lx · I²C · 2.5 to 3.6 V
Vishay’s ambient light sensor: up to 140,000 lx and 0.0042 lx resolution, enough for sunlight and dusk.
Watch out: Fixed address 0x10. Set gain and integration time to suit the light, or let the library do it.
| Feature | BH1750 | VEML7700 |
|---|---|---|
| Light range | 0.11 lx to 100,000 lx | 0.0042 lx to 140,000 lx |
| Resolution | 0.11 lx | 0.0042 lx |
| I²C address | 0x23, 0x5C (set with a pin) | 0x10 |
| Supply | 2.4 to 3.6 V | 2.5 to 3.6 V |
| Current between readings | 0.01 µA | 0.5 µA |
| ESPHome | bh1750 | veml7700 |
Same on both: measures · interface · status.
Open the sensor comparison →Tick what your project needs and see which sensor fits best.
BH1750: I²C address, wiring and pull-ups →
VEML7700: I²C address, wiring and pull-ups →
The BH1750 offers a choice of I²C addresses and less current between readings. The VEML7700 offers readings in very low light.
The BH1750: 0.11 lx to 100,000 lx. The VEML7700: 0.0042 lx to 140,000 lx.
Often yes: both use I²C. Change the driver or, in ESPHome, the component (bh1750 → veml7700). The I²C address changes too (0x23/0x5C → 0x10).
Figures from the makers’ datasheets and product pages and the ESPHome documentation, checked in November 2026.