First we need to enable the SPI. Open the raspi-config:
sudo raspi-config
Select option number 3: Interface Options and press Enter. Now select I4: SPI and again press Enter. You will be asked if you want to enable the SPI interface, select Yes and press Enter. Wait a little while for enabling SPI. You should see on the screen the following text: "The SPI interface is enabled".
Go to Interface Options again and this time select I5: I2C.
For fully enabled SPI interface and I2C we need to reboot the RPI. Press ESC and type the following command:
sudo reboot
When rebooting is finished, we can check SPI interface is enabled. Run following command:
lsmod | grep spi
If you see spi_bcm2835 you can be sure that it worked. In the other case it needs to be changed in config file. Run following command:
sudo nano /boot/config.txt
Use CTRL + W to find dtparam=spi=on. If there is a # in front of it, remove it. If you can't find the line at all, add it to the bottom of the file.
We need to update RPI to be sure we are working on the latest version:
sudo apt update
sudo apt upgrade
Now we can install Python:
sudo apt install python3-dev python3-pip
And also GIT:
sudo apt install git
The next step is prepare RPI to communicate with LCD. Run following command:
sudo apt-get install -y python-smbus
sudo apt-get install -y i2c-tools
If you want to find LCD address:
i2cdetect -y 1
It should look like this:
When we know the LCD address we need to verify it in script. We can find script location with the command below:
sudo find /usr/local -name rpi_lcd 2> /dev/null
Copy the location and paste it below:
cd file_path_found
If you are in the correct location, you need to open init file:
sudo nano __init__.py
Verify LCD address with address in the init function:
If address is the same you can close the file. If it is different, you need to change it and save the file.
Last thing is to install all required libraries:
sudo pip3 install spidev
sudo pip3 install mfrc522
sudo pip3 install rpi_lcd
We are ready for download repository. Run following command:
git clone git@github.com:MSoftwaree/rfid-copier.git
Go to repository destination:
cd rfid-copier
Install virtualenv package:
sudo pip3 install virtualenv
Create a virtual environment:
sudo python3 -m virtualenv venv
Activate virtual environment:
source ./python_env/bin/activate
RPI and whole repository is prepared for using.