Gesture Recognition Sensor GY-PAJ7620U2 Module

Description

What it is

The GY-PAJ7620U2 sensor is a module that recognizes up to 9 human gestures, such as hand movements. This device is useful for human-machine interaction projects and touchless controls.

Features

• Recognizes 9 gestures
• Powerful for robotics, games, and interactive systems applications

What it is for

Ideal for projects requiring touchless control, such as adjusting volume or changing channels on a TV. Compatible with Arduino and ESP.

Tutorial: How to Use GY-PAJ7620U2 Gesture Recognition Sensor

The GY-PAJ7620U2 sensor is a module useful for detecting and interpreting human gestures such as hand movements. Ideal for interactive, robotics, or game projects.

What you need

• Arduino Uno
• USB A-MicroB cable
• 5V Power Supply

Steps

1. Connect the following pins of the sensor to your Arduino: VCC to 5V, GND to GND, SDA to A4, SCL to A5.
2. Download the I2Cdevlib library from GitHub and install it in the Arduino IDE.
3. Include the Paj7620.h file from the I2Cdevlib library in your sketch.
4. Instantiate the Paj7620 object with the SDA and SCL pins connected to the sensor.
5. Check if the connection to the sensor is stable by calling the testConnection() function.
6. Activate the sensor by invoking the initialize() function, passing 9 as an argument (number of recognized gestures).
7. Enable the gestures you want to monitor using enableGestures(). Check the datasheet to get the correct constants.
8. In the main loop, check if a new gesture has been detected and display the result.

Example code

Paj7620 gesture;

void setup() {
gesture.initialize(9);
gesture.enableGestures();
}

void loop() {
if (gesture.isNewGesture()) {
digitalWrite(LED_BUILTIN, HIGH);
Serial.print("Rilevato gesto: ");
Serial.println(gesture.getLatestRecognizedGesture());
delay(500);
digitalWrite(LED_BUILTIN, LOW);
}
}

Mini project

Create an interactive control system for a projector or TV. Use the gestures detected by the GY-PAJ7620U2 sensor to control the volume and change channels.

Common mistakes

• Make sure all pins are correctly connected.
• Ensure that the I2Cdevlib library is installed.
• Check the gesture constants in the sensor’s datasheet.
• Check the module power supply (5V).

Recommended accessories

• Arduino Uno
• 3D Printer to create a protective housing for the sensor
• RGB LED
• Buzzer

Frequently asked questions

How can I optimize gesture detection?
Increase brightness and reduce visual interference.

What is the minimum power supply required for the sensor?
5V, check the datasheet.