Smart Garbage

Before we can run the code we are going to prepare the raspberry pi.

1) Downloading Raspberry Pi OS.

Go to Raspberry Pi OS and download image –> (Raspberry Pi OS with desktop). This may take a while.

2) Writing image to your SD Card.

When it is finished downloading, you can write the image to your sd card with (recommend 8 or 16GB) Win32 Disk Imager. How to do this? Tutorial Video

3) Configuring the SD Card. When writing is done, we can start setting up the SD Card.

• Open file explorer.
• Go to my pc –> find boot disk
• Create a new file ssh without extension Notepad++.
• Add ‘ip=169.254.10.1' to the end of the file and save it.

4) Starting the Raspberry Pi.

• Connect an internet cable from your PC to your Pi
• Open Putty.
• Choose port 22 and enter the ip address of your Pi 169.254.10.1 and connection type SSH.
• Enter login pi and the password raspberry.
• If you get a warning message, click Yes.

5) Some configuration.

Enable I2C and SPI on the Raspberry Pi with:

sudo raspi-config

Choose Interface Options and enable (I2C and SPI). Navigate to Localisation Options –> change timezone and WLAN Country.

Then reboot the Pi.

sudo reboot

6) Adding WiFi.

Adding your own home wifi.

sudo wpa_passphrase 'Networkname' 'Password' >> /etc/wpa_supplicant wpa_supplicant.conf

Reload your wireless network card in the PI.

wpa_cli -i wlan0 reconfigure

You can now check the connection by requesting the ip-address (wlan0).

ifconfig

7) Installing some packages.

Stay up to date with the latest version.

sudo apt update
sudo apt upgrade

Install the following packages and libraries for python:

sudo pip install flask-cors
sudo pip install flask-socketio
sudo pip install simple-websocket
sudo pip install mysql-connector-python
sudo pip install gevent
sudo pip install gevent-websocket
sudo pip install selenium
sudo apt install chromium-chromedriver
sudo pip3 install rpi_ws281x adafruit-circuitpython-neopixel
sudo python3 -m pip install --force-reinstall adafruit-blinka
sudo apt install python3-dev python3-pip
sudo pip3 install mfrc522

Now reboot the Pi.

sudo reboot

8) Get github code.

Clone the github repository.

git clone https://github.com/howest-mct/2021-2022-projectone-Jinlei2000

9) Database

Install MariaDB and configuration.

sudo apt install mariadb-server mariadb-client -y

Securing the database.

sudo mysql_secure_installation

Enter > Type a password (remember) > y > y > y > y Create a user on the database.

sudo mysql -u root -p
create user 'USERNAME'@'localhost' identified by 'USERNAME';
grant all privileges on *.* to USERNAME@localhost;
flush privileges;
exit;

Make a new connection on MySQLWorkBench

• Open MySQL WorkBench and make a new connection.
• Connection Method –> Standard TCP/IP over SSH.
• SSH Hostname: 169.254.10.1
• SSH Username: pi
• SSH Password: raspberry
• MySQL Hostname: 127.0.0.1
• MySQL Server Port: 3306
• Username: USERNAME
• Password: PASSWORD

10) Apache

Install Apache and configuration.

sudo apt install apache2

Some plugins:

sudo a2enmod proxy_http
sudo a2enmod rewrite
sudo a2enmod ssl

Follow this link to configure Self Signed Certificate for https: Tutorial Change some configurations.

nano /etc/apache2/sites-available/000-default.conf

Replace the following lines with the following lines and change DocumentRoot to the path of your project (SAVE: CTRL + X > Y > Enter):

Go to GitHub copy apache file

Now restart the Apache.

sudo systemctl restart apache2

Check the status of Apache.

sudo systemctl status apache2

Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset:
enabled)
Active: active (running) since ...

11) Run the server.

Last things to be done. Go to Geoapify create account and make a new project. Now copy the API key. Then go to the project directory on the PI (frontend > script > dashboard.js > line 371) and paste the API key.

Ready to run everything 😆.

sudo /bin/python3 /backend/app.py

12) Automatic starting of the software (services).

If you follow this your raspberry pi is booting your software will start automatically. I have 2 files that need to be started. One is app.py and other is powerbtn.py.

Create the file and put the contents of the following lines in it:

nano /etc/systemd/system/smartgarbage.service

Don't forget to replace the placeholders with the correct directory (ExecStart, WorkingDirectory)!

[Unit]
Description=smartgarbage
After=network.target
[Service]
ExecStart==/usr/bin/python3 -u /home/student/2021-2022-projectone-Jinlei2000/backend/app.py
WorkingDirectory=/home/student/2021-2022-projectone-Jinlei2000/backend
StandardOutput=inherit
StandardError=inherit
Restart=always
User=root
[Install]
WantedBy=multi-user.target

Save the file (CTRL + X > Y).

Now we are going to create the second service for the powerbtn.py

nano /etc/systemd/system/powerbtn.service

Don't forget to replace the placeholders with the correct directory (ExecStart, WorkingDirectory)!

[Unit]
Description=powerbtn
After=network.target
[Service]
ExecStart==/usr/bin/python3 -u /home/student/2021-2022-projectone-Jinlei2000/backend/powerbtn.py
WorkingDirectory=/home/student/2021-2022-projectone-Jinlei2000/backend
StandardOutput=inherit
StandardError=inherit
Restart=always
User=root
[Install]
WantedBy=multi-user.target

Notify the system of the new service Next, inform the system that the new service should be active.

sudo systemctl enable powerbtn.service

Restart the system.

sudo reboot

You can now use the power button to turn the app.py script on or off. If you hold the power button longer than 6 seconds the raspberry pi will shutdown.

Step 4: Backend