TCS34725 colour sensor with ESP32

Supply 3.3-5 V Bus I2C I2C address 0x29 Measures color, light

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
LED	Input (the ESP32 drives it)	D25	Pull LOW to switch the white LED off; leave open for on
INT	Interrupt	D35	Interrupt output, optional
SDA	I2C data (SDA)	D21
SCL	I2C clock (SCL)	D22
3V3	Not wired to the ESP32	—	Output of the on-board regulator. Leave unconnected
GND	Ground	GND
VIN	Power	3V3

Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.

Starter code (Arduino)

#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);  // SDA = GPIO 21, SCL = GPIO 22
  Wire.beginTransmission(0x29);
  bool found = Wire.endTransmission() == 0;
  Serial.println(found ? "TCS34725 colour sensor found at 0x29" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Sources

ams TCS3472 datasheet, I2C address 0x29
ams TCS3472 datasheet, ID register 0x12 (needs the command bit, so not read here)

Try it in 3D in BoardPilot

BoardPilot Part data (JSON)

Part data: CC BY 4.0, free to reuse with credit to BoardPilot.

TCS34725 colour sensor with ESP32

Pins and ESP32 wiring

Starter code (Arduino)

Sources

Try it in 3D in BoardPilot

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