GY-31 TCS3200 Color Recognition Sensor Module

Uses TCS3200 Sensor for accurate color detection
Detects RGB Colors and converts to frequency output
Built-in White LEDs for consistent illumination
Compatible with Arduino, Raspberry Pi and other microcontrollers
Ideal for Line Tracking, Color Sorting, and Robotics Projects

SKU: aA1822 Categories: Light/Color Sensor, Sensors Tags: Light/Color Sensor, Sensors

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Description

Give your hardware the ability to “see” and differentiate colors with the GY-31 TCS3200 Color Recognition Sensor Module. Built around the highly accurate TAOS TCS3200 RGB sensor chip, this module acts as a complete color detector by converting light intensity directly into a readable square-wave frequency. It features an 8×8 array of filtered photodiodes and four onboard bright white LEDs to illuminate the target object, ensuring reliable readings regardless of ambient lighting conditions. Because it outputs a simple digital frequency, it interfaces seamlessly with any standard microcontroller—like an Arduino or ESP32—making it the perfect addition to automated color sorting machines, environmental monitoring nodes, or interactive robotic systems.

Key Features

Accurate Color Detection: Utilizes an integrated array of 64 photodiodes (16 Red, 16 Green, 16 Blue, and 16 Clear) to accurately measure and separate the RGB components of reflected light.
Direct Frequency Output: Converts detected light intensity directly into a high-resolution square-wave frequency, allowing for easy reading via standard microcontroller digital pins without needing an analog-to-digital converter (ADC).
Programmable Scaling: Features selectable output frequency scaling (2%, 20%, or 100%) via the S0 and S1 pins, allowing you to optimize the module for different processor speeds and timing requirements.
Integrated Lighting: Includes 4 bright white LEDs to provide a consistent light source for the object being measured, effectively neutralizing the impact of external room lighting.
Microcontroller Ready: Operates on standard logic levels and voltages (2.7V to 5.5V), making it immediately plug-and-play compatible with 3.3V and 5V development boards.

Technical Specifications

Specification	Detail
Sensor Chip	TAOS TCS3200
Operating Voltage (VCC)	2.7V – 5.5V DC
Output Type	Digital Square Wave (Frequency directly proportional to light intensity)
Photodiode Filters	Red, Green, Blue, Clear (Selectable via S2 & S3 pins)
Frequency Scaling	Power Down, 2%, 20%, 100% (Selectable via S0 & S1 pins)
Optimal Sensing Distance	~10 mm (1 cm)
Temperature Coefficient	Stable at 200 ppm/°C
Dimensions	~33.2 mm × 33.2 mm × 25 mm

Pinout Configuration

VCC: Power Supply (2.7V – 5.5V)
GND: Ground
OE: Output Enable (Active Low)
OUT: Frequency Output Signal
S0, S1: Output Frequency Scaling Selection Inputs
S2, S3: Photodiode Type (Color Filter) Selection Inputs
LED: Onboard LED Control (High = On, Low = Off)

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Pin Connections

1 Table

Pin Connections Table 1

Board	Sensor Pin	Connection
TCS3200	VCC/GND/S0-S3/OUT	3.3-5V / GND / 4 digital pins / 1 digital pin

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GY-31 TCS3200 Color Recognition Sensor Module

7 Examples • C/C++ | Boards: Arduino Uno, Arduino Nano, Arduino Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico

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GY-31 TCS3200 Color Recognition Sensor Module - Arduino Uno

GY-31 TCS3200 Color Recognition Sensor Module - Arduino Nano

GY-31 TCS3200 Color Recognition Sensor Module - Arduino Mega

GY-31 TCS3200 Color Recognition Sensor Module - ESP32

GY-31 TCS3200 Color Recognition Sensor Module - ESP8266

GY-31 TCS3200 Color Recognition Sensor Module - STM32

GY-31 TCS3200 Color Recognition Sensor Module - Raspberry Pi Pico

📄 File: gy-31_tcs3200_color_recognition_sensor_module_-_arduino_uno.inoArduino Uno

867 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// S0=4, S1=5, S2=6, S3=7, OUT=8 on Arduino Uno

6#define S0 4

7#define S1 5

8#define S2 6

9#define S3 7

10#define OUT_PIN 8

12void setup() {

13 Serial.begin(115200);

14 pinMode(S0, OUTPUT); pinMode(S1, OUTPUT);

15 pinMode(S2, OUTPUT); pinMode(S3, OUTPUT);

16 pinMode(OUT_PIN, INPUT);

17 digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // 20% frequency scaling

18}

20int readColorFreq(bool s2val, bool s3val) {

21 digitalWrite(S2, s2val); digitalWrite(S3, s3val);

22 return pulseIn(OUT_PIN, LOW, 50000); // lower period = more of that color

23}

25void loop() {

26 int red = readColorFreq(LOW, LOW);

27 int blue = readColorFreq(LOW, HIGH);

28 int green = readColorFreq(HIGH, HIGH);

30 Serial.print("R:"); Serial.print(red);

31 Serial.print(" G:"); Serial.print(green);

32 Serial.print(" B:"); Serial.println(blue);

34 delay(200);

35}

📄 File: gy-31_tcs3200_color_recognition_sensor_module_-_arduino_nano.inoArduino Nano

868 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// S0=4, S1=5, S2=6, S3=7, OUT=8 on Arduino Nano

6#define S0 4

7#define S1 5

8#define S2 6

9#define S3 7

10#define OUT_PIN 8

12void setup() {

13 Serial.begin(115200);

14 pinMode(S0, OUTPUT); pinMode(S1, OUTPUT);

15 pinMode(S2, OUTPUT); pinMode(S3, OUTPUT);

16 pinMode(OUT_PIN, INPUT);

17 digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // 20% frequency scaling

18}

20int readColorFreq(bool s2val, bool s3val) {

21 digitalWrite(S2, s2val); digitalWrite(S3, s3val);

22 return pulseIn(OUT_PIN, LOW, 50000); // lower period = more of that color

23}

25void loop() {

26 int red = readColorFreq(LOW, LOW);

27 int blue = readColorFreq(LOW, HIGH);

28 int green = readColorFreq(HIGH, HIGH);

30 Serial.print("R:"); Serial.print(red);

31 Serial.print(" G:"); Serial.print(green);

32 Serial.print(" B:"); Serial.println(blue);

34 delay(200);

35}

📄 File: gy-31_tcs3200_color_recognition_sensor_module_-_arduino_mega.inoArduino Mega

868 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// S0=4, S1=5, S2=6, S3=7, OUT=8 on Arduino Mega

6#define S0 4

7#define S1 5

8#define S2 6

9#define S3 7

10#define OUT_PIN 8

12void setup() {

13 Serial.begin(115200);

14 pinMode(S0, OUTPUT); pinMode(S1, OUTPUT);

15 pinMode(S2, OUTPUT); pinMode(S3, OUTPUT);

16 pinMode(OUT_PIN, INPUT);

17 digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // 20% frequency scaling

18}

20int readColorFreq(bool s2val, bool s3val) {

21 digitalWrite(S2, s2val); digitalWrite(S3, s3val);

22 return pulseIn(OUT_PIN, LOW, 50000); // lower period = more of that color

23}

25void loop() {

26 int red = readColorFreq(LOW, LOW);

27 int blue = readColorFreq(LOW, HIGH);

28 int green = readColorFreq(HIGH, HIGH);

30 Serial.print("R:"); Serial.print(red);

31 Serial.print(" G:"); Serial.print(green);

32 Serial.print(" B:"); Serial.println(blue);

34 delay(200);

35}

📄 File: gy-31_tcs3200_color_recognition_sensor_module_-_esp32.inoESP32

871 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// S0=25, S1=26, S2=27, S3=14, OUT=12 on ESP32

6#define S0 25

7#define S1 26

8#define S2 27

9#define S3 14

10#define OUT_PIN 12

12void setup() {

13 Serial.begin(115200);

14 pinMode(S0, OUTPUT); pinMode(S1, OUTPUT);

15 pinMode(S2, OUTPUT); pinMode(S3, OUTPUT);

16 pinMode(OUT_PIN, INPUT);

17 digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // 20% frequency scaling

18}

20int readColorFreq(bool s2val, bool s3val) {

21 digitalWrite(S2, s2val); digitalWrite(S3, s3val);

22 return pulseIn(OUT_PIN, LOW, 50000); // lower period = more of that color

23}

25void loop() {

26 int red = readColorFreq(LOW, LOW);

27 int blue = readColorFreq(LOW, HIGH);

28 int green = readColorFreq(HIGH, HIGH);

30 Serial.print("R:"); Serial.print(red);

31 Serial.print(" G:"); Serial.print(green);

32 Serial.print(" B:"); Serial.println(blue);

34 delay(200);

35}

📄 File: gy-31_tcs3200_color_recognition_sensor_module_-_esp8266.inoESP8266

873 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// S0=D0, S1=D1, S2=D2, S3=D3, OUT=D4 on ESP8266

6#define S0 D0

7#define S1 D1

8#define S2 D2

9#define S3 D3

10#define OUT_PIN D4

12void setup() {

13 Serial.begin(115200);

14 pinMode(S0, OUTPUT); pinMode(S1, OUTPUT);

15 pinMode(S2, OUTPUT); pinMode(S3, OUTPUT);

16 pinMode(OUT_PIN, INPUT);

17 digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // 20% frequency scaling

18}

20int readColorFreq(bool s2val, bool s3val) {

21 digitalWrite(S2, s2val); digitalWrite(S3, s3val);

22 return pulseIn(OUT_PIN, LOW, 50000); // lower period = more of that color

23}

25void loop() {

26 int red = readColorFreq(LOW, LOW);

27 int blue = readColorFreq(LOW, HIGH);

28 int green = readColorFreq(HIGH, HIGH);

30 Serial.print("R:"); Serial.print(red);

31 Serial.print(" G:"); Serial.print(green);

32 Serial.print(" B:"); Serial.println(blue);

34 delay(200);

35}

📄 File: gy-31_tcs3200_color_recognition_sensor_module_-_stm32.inoSTM32

881 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// S0=PA0, S1=PA1, S2=PA2, S3=PA3, OUT=PA4 on STM32

6#define S0 PA0

7#define S1 PA1

8#define S2 PA2

9#define S3 PA3

10#define OUT_PIN PA4

12void setup() {

13 Serial.begin(115200);

14 pinMode(S0, OUTPUT); pinMode(S1, OUTPUT);

15 pinMode(S2, OUTPUT); pinMode(S3, OUTPUT);

16 pinMode(OUT_PIN, INPUT);

17 digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // 20% frequency scaling

18}

20int readColorFreq(bool s2val, bool s3val) {

21 digitalWrite(S2, s2val); digitalWrite(S3, s3val);

22 return pulseIn(OUT_PIN, LOW, 50000); // lower period = more of that color

23}

25void loop() {

26 int red = readColorFreq(LOW, LOW);

27 int blue = readColorFreq(LOW, HIGH);

28 int green = readColorFreq(HIGH, HIGH);

30 Serial.print("R:"); Serial.print(red);

31 Serial.print(" G:"); Serial.print(green);

32 Serial.print(" B:"); Serial.println(blue);

34 delay(200);

35}

📄 File: gy-31_tcs3200_color_recognition_sensor_module_-_raspberry_pi_pico.inoRaspberry Pi Pico

883 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// S0=10, S1=11, S2=12, S3=13, OUT=14 on Raspberry Pi Pico

6#define S0 10

7#define S1 11

8#define S2 12

9#define S3 13

10#define OUT_PIN 14

12void setup() {

13 Serial.begin(115200);

14 pinMode(S0, OUTPUT); pinMode(S1, OUTPUT);

15 pinMode(S2, OUTPUT); pinMode(S3, OUTPUT);

16 pinMode(OUT_PIN, INPUT);

17 digitalWrite(S0, HIGH); digitalWrite(S1, LOW); // 20% frequency scaling

18}

20int readColorFreq(bool s2val, bool s3val) {

21 digitalWrite(S2, s2val); digitalWrite(S3, s3val);

22 return pulseIn(OUT_PIN, LOW, 50000); // lower period = more of that color

23}

25void loop() {

26 int red = readColorFreq(LOW, LOW);

27 int blue = readColorFreq(LOW, HIGH);

28 int green = readColorFreq(HIGH, HIGH);

30 Serial.print("R:"); Serial.print(red);

31 Serial.print(" G:"); Serial.print(green);

32 Serial.print(" B:"); Serial.println(blue);

34 delay(200);

35}

Project Notes:

Frequency-output color sensor, same protocol as TCS230.

Specification

WeightWeight	6 g
Dimensions	3 × 2 × 1 cm
Sensor	TCS3200
Function	Color Recognition / Color Sensing
Output	Frequency output corresponding to color intensity
Interface	Digital pins (S0–S4)
Operating Voltage	3.3V–5V
Material	PCB with electronic components
Usage	Color detection projects, robotics, automated sorting, DIY electronics