PAJ7620U2 Gesture Sensor

PAJ7620U2 Gesture Sensor

Introduction

PAJ7620U2 Gesture Sensor, gesture recognition function with general I2C interface into a single chip.
It can recognize 9 gestures including move up, move down, move left, move right, etc with a simple swipe of your hand.

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Features

Based on PAJ7620U2 sensor, directly recognizes 9 basic gestures, supports gesture interrupt output.
Embedded infrared LED and optical lens, be able to work in low-light even dark environment.
I2C interface, requires only two signal pins to control.
Onboard voltage translator, compatible with 3.3V/5V logic level.

Specification

Operating voltage: 3.3V/5V
Communication interface: I2C
Recognition distance: 5cm ~ 15cm
Supported gestures: up, down, left, right, forward, backward, clockwise, anticlockwise, shake
Recognition rate: 240Hz
Recognition angle: 60° (diagonal)
Ambient light immunity: <100k Lux
Dimensions: 20mm × 20mm
Mounting hole size: 2.0mm
Application: smart home, offices and teaching, human-robot interaction, gesture toys and domatosensory game equipment

Interface

PIN	SYMBOL	Description
1	VCC	3.3V/5V
2	GND	Ground
3	SDA	I2C data pin
4	SCL	I2C clock pin
5	INT	External interrupt pin

How to use it

We provide demo codes for easy testing, you can download the demo codes from #Resources

Unzip the archive downloaded to get the codes.

Raspberry Pi

Insert the Micro SD card of Raspberry Pi to the host PC.
Copy the RapberryPi folder to the boot directory of the micro SD card.
Start your Raspberry Pi with the Micro SD card.
You can find that the Raspberry Pi codes are saved in the BOOT directory.

Copy the folder to the home directory

sudo cp -r /boot/RaspberryPi/ ./
sudo chmod 777 -R RaspberryPi/
cd RaspberryPi

Install libraries

BCM2835:

wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.64.tar.gz
sudo tar zxvf bcm2835-1.64.tar.gz
cd bcm2835-1.64
sudo ./configure
sudo make
sudo make check
sudo make install

Install wiringPi

sudo apt-get install git
sudo git clone git://git.drogon.net/wiringPi
cd wiringPi
sudo ./build

Install python

sudo apt-get install python-pip 
sudo pip install RPi.GPIO
sudo pip install spidev
sudo apt-get install python-imaging
sudo apt-get install python-smbus
sudo apt-get install python-serial

Enable I2C

sudo raspi-config

Choose Interfacing Options -> I2C -> Yes

Hardware connection

The colors of the wires may be different, please connect them according to the silk screen printing.

Gesture Sensor	Raspberry Pi (Board)	Raspberry Pi(BCM2835）
VCC	3.3V	3.3V
GND	GND	GND
SDA	3	P2
SCL	5	P3

Run the codes

BCM2835 codes

cd ~/RaspberryPi/bcm2835/
cd Gesture
sudo make
sudo ./PAJ7620U2

wiringPi codes

cd ~/RaspberryPi/wiringPi
cd Gesture
sudo make
sudo ./PAJ7620U2

Python codes

cd ~/RaspberryPi/python
cd Gesture			
sudo python PAJ7620U2.py

Expected result

Gesture detecting:

Object detecting:

STM32 examples

The STM32 examples are based on Waveshare XNUCLEO-F103RB whose chip is STM32F103RB, HAL libraries.

Hardware connection

Connect the sensor to the STM32 board according to the table, then connect the USB to UART interface of the XNUCLEO board to the host PC.

Gesture Sensor	STM32
VCC	3.3V/5V
GND	GND
SDA	PB9
SCL	PB8

Open the project (STM32 demo codes) with Keil software
Compile it and program to board

Expectre result

Run serial assistance software, set baud rate to 115200
Gesture Detecting:

Obeject detecting:

Arduino

The demo codes provide is based on the Arduino UNO.

Hardware connection

Gesture Sensor	Arduino
VCC	5V
GND	GND
SDA	SDA
SCL	SCL

Open the codes by Arduino IDE.
Compile and upload to Arduino Board.

Expected result

Gesture detecting

Object detecting

Resources

Support

Technical Support

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