ET-S56
BH1750 Light Sensor
Lux meter from 1 to 65,535 lx, Qwiic
AED 14.00
Out of stockOverview
Lux meter from 1 to 65,535 lx, Qwiic
The ET-S56 is built around the ROHM BH1750FVI — 1–65535 lx, human-eye spectral response, 50/60Hz flicker rejection. It connects over I²C 0x23 / 0x5C and is powered from VIN 3.3–5.5V, onboard LDO + level shifting.
Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Automatic lighting
- Plant and greenhouse light
- Screen brightness control
Key features
What makes it different
Sensor
ROHM BH1750FVI: 1–65535 lx, human-eye spectral response, 50/60Hz flicker rejection
Interface
I²C 0x23 / 0x5C
Supply
VIN 3.3–5.5V, onboard LDO + level shifting
Libraries
BH1750 (claws), CircuitPython adafruit_bh1750, ESPHome bh1750
Qwiic / STEMMA QT
Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.
Open documentation
Schematic, BOM and layout notes published for every board.
Specifications
Technical specifications
| Sensor | ROHM BH1750FVI: 1–65535 lx, human-eye spectral response, 50/60Hz flicker rejection |
|---|---|
| Interface | I²C 0x23 / 0x5C |
| Supply | VIN 3.3–5.5V, onboard LDO + level shifting |
| Size | 25.4 × 17.8 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 2 × Qwiic / STEMMA QT (JST SH 4-pin) · 5-pin 2.54 mm header |
| Main IC | BH1750FVI-TR (LCSC C78960) |
| Revision | Rev A |
| Libraries | BH1750 (claws), CircuitPython adafruit_bh1750, ESPHome bh1750 |
|---|
| JP1 (default Closed) | Cut to turn off the LED |
|---|---|
| JP2 (default Closed) | Cut to remove the host-side I2C pull-ups |
| JP3 (default Open) | Bridge ADDR to 3V3 → 0x5C |
Performance
Speed
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 3.3–5.5V |
| 2 | 3V3 | Power | LDO output |
| 3 | GND | Ground | Ground |
| 4 | SCL | I²C | I²C clock |
| 5 | SDA | I²C | I²C data |
Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors). I²C pull-ups (10 kΩ) are on the board; cut JP2 to remove them.
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-S56 BH1750 Light Sensor (assembled)
- 1 × 5-pin 2.54 mm male header, unsoldered
Getting started
- Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
- Libraries: BH1750 (claws), CircuitPython adafruit_bh1750, ESPHome
bh1750 - Run an I²C scanner to confirm the address: 0x23, 0x5C
Compare
Which light sensor?
| BH1750 Light Sensor (this board)This board | ET-S57 TCS34725 Colour Sensor | ET-S03 VEML7700 Ambient Light Sensor | |
|---|---|---|---|
| What it does | Lux meter from 1 to 65,535 lx, Qwiic | RGB + clear colour sensing with IR filter, Qwiic | High-accuracy lux sensor, 0–120k lux, Qwiic |
| Interface | I²C 0x23 / 0x5C | I²C fixed 0x29, interrupt output | I²C, fixed 0x10 |
| Best for | Automatic lighting | Colour sorting machines | Auto-brightness for displays |
| Price | 14 AED | 25 AED | 15 AED |
Downloads
Documents and design files
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