// light
TSL2561
High-precision lux sensor
€3.00
avg eur
I2C
Pins
4
Specs
3
Libraries
1
Protocols
1
// wiring → esp32 devkit v1
VCC
3V3
EN
GPIO36
VP
GPIO39
VN
GPIO34
GPIO35
GPIO32
GPIO33
GPIO25
GPIO26
GPIO27
GPIO14
GPIO12
GND
GND
GPIO13
ESP32
WROOM-32
devkit v1
USB
VIN
5V
GND
GPIO23
GPIO22
SCL
SCL
GPIO1
TX0
GPIO3
RX0
GPIO21
SDA
SDA
GPIO19
MISO
GPIO18
SCK
GPIO5
SS
GPIO17
TX2
GPIO16
RX2
GPIO4
GPIO2
GPIO15
sensor pin (left)
sensor pin (right)
unused
// pinout → esp32
| Sensor Pin | ESP32 Connection |
|---|---|
| VCC | 3.3V |
| GND | GND |
| SCL | GPIO 22 |
| SDA | GPIO 21 |
// technical specs
Range
0.1–40000 lux
Dynamic
1M:1
I2C addr
0x29 / 0x39 / 0x49
// github libraries
// notes & warnings
Separates IR vs visible. Better than BH1750 for tricky lighting (incandescent, IR-heavy).
// related sensors · light
Submitted by caio.ricciuti@outlook.com
· Apr 26, 2026