PAJ7620U2 Gesture Sensor User Guide

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.

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

Interface

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

• Copy the folder to 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 Interfaceing Options -> I2C -> Yes

Hardware connection

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

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

Expecture result

• Gesture detecting

• Object detecting

STM32 examples

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

Hardware connection

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

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

Expectre result

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

• Obeject detecting:

Arduino

The demo codes provide is based on the Arduino UNO

Hardware connection

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

Expected result

• Gesture detecting

• Object detecting

Resources

• Schematic
• Demo Code
• Datasheets

To：

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