Required packages:

• Raspberry Pi OS 32bit (previously called Raspbian): https://www.raspberrypi.com/software/
• Cmake: https://cmake.org/download/
• OpenCV for C++: https://opencv.org/
• zbar: https://github.com/ZBar/ZBar
• wiringPi: http://wiringpi.com/wiringpi-updated-for-the-pi-v3plus/

Installing Raspberry Pi OS:

1. Download package.
2. Install Raspberry Pi OS on your PC.
3. Insert SD card into your PC.
4. Open Raspberry Pi Imager.
5. In Operating system select: Raspberry Pi OS (32-bit)
6. In Storage select your SD card.
7. Select setting and add your WIFI name (SSID) and password.
8. Finally, click on Write.

Installing CMake:

1. Open terminal
2. Installation

sudo apt-get install cmake

Installing Opencv

1. Open terminal
2. Download OpenCV from Official website
3. Extract all
4. Open terminal and use cd go to the opencv directory
5. Create a new build folder for building

mkdir build
cd build

6. Compilation

cmake ..
sudo make
sudo make install

sudo make is very time consuming, about five to six hours depending on the internet speed.

Installing zbar

1. Open terminal
2. Installation

sudo apt-get install libzbar-dev

Installing wiringPi

1. Open terminal
2. Installation

cd /tmp
wget https://unicorn.drogon.net/wiringpi-2.46-1.deb
sudo dpkg -i wiringpi-2.46-1.deb

3. To test if you have already installed wiringPi, you can open terminal

gpio readall

if there is the map of gpio, you have installed the wiringPi successfully