software.raspberrypi

Raspberry pi

Prerequisites

• Install raspbian in the raspberry pi
  • Download rasbpian os stretch lite
  • Use etcher for install raspbian in sd card

Configure raspbian

Change options in raspi-config

pi@raspberrypi:~ $ sudo raspi-config

Select "Interfacing" options and enable:

• I2C
• SSH

Select "Update" for update OS

Installation

Save you sd card 😏 use log2ram (1)

pi@raspberrypi:~ $ curl -Lo log2ram.tar.gz https://github.com/azlux/log2ram/archive/master.tar.gz
pi@raspberrypi:~ $ tar xf log2ram.tar.gz
pi@raspberrypi:~ $ cd log2ram-master 
pi@raspberrypi:~ $ chmod +x install.sh && sudo ./install.sh
pi@raspberrypi:~ $ cd ..
pi@raspberrypi:~ $ rm -r log2ram-master

Modify line "Before=" and add nginx.service

pi@raspberrypi:~ $ nano /etc/systemd/system/log2ram.service

Install openbox (2)

pi@raspberrypi:~ $ sudo apt-get install --no-install-recommends xserver-xorg x11-xserver-utils xinit openbox

Install firefox and chromium (chromium will used only for the tests)

pi@raspberrypi:~ $ sudo apt-get install firefox chromium-browser

Install supervisor

pi@raspberrypi:~ $ sudo apt install supervisor

Install python 3

pi@raspberrypi:~ $ sudo apt install python3.5

Install rabbitmq

pi@raspberrypi:~ $ sudo apt install rabbitmq-server

Install virtualenv

pi@raspberrypi:~ $ sudo apt install python3-virtualenv 

Install nginx

pi@raspberrypi:~ $ sudo apt install nginx

clone the repository

pi@raspberrypi:~ $ git clone https://github.com/scwall/cocktail_engine.git

Create pipenv

pi@raspberrypi:~ $ cd cocktail_engine
pi@raspberrypi:~/cocktail_engine $ pipenv install --ignore-pipfile
(cocktail_engine) pi@raspberrypi:~/cocktail_engine $ exit

Configuration

Openbox Configuration (2)

pi@raspberrypi:~ $ sudo nano /etc/xdg/openbox/autostart

and replace its content with the following:

# Disable any form of screen saver / screen blanking / power management
xset s off
xset s noblank
xset -dpms
# Start firefox
firefox

.bash_profile Configuration (2)

pi@raspberrypi:~ $ sudo nano .bash_profile

add line

[[ -z $DISPLAY && $XDG_VTNR -eq 1 ]] && startx -- -nocursor`

Firefox configuration

Add all modules in firefox to the folder firefox_addons, modify kiosk mod and add main page http://127.0.0.1:14050

nginx configuration (3)&(4)

Create file cocktailengine in 'sites-available'

pi@raspberrypi:~ $ sudo touch /etc/nginx/sites-available/cocktailengine

Edit the file cocktailengine

pi@raspberrypi:~ $ sudo nano /etc/nginx/sites-available/cocktailengine

and paste the code below

server {

    listen 14050; server_name ~^.*$;
    root /home/pi/cocktail_engine/;
location /static {
        alias /home/pi/cocktail_engine/static/;
    }
location /media/ {
        alias /home/pi/cocktail_engine/media/;
    }
    location / {
satisfy any;
allow 192.168.0.1/24;
allow 192.168.1.1/24;
allow 127.0.0.1;
deny  all;
        auth_basic "Restricted Content";
        auth_basic_user_file /etc/nginx/.htpasswd;
        proxy_set_header Host $http_host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_redirect off;
        proxy_pass http://127.0.0.1:8000;
    }

}

Change the address ip "192.168.0.1" and "192.168.1.1 to your configuration router and the port at your convenience

Create symbolic link between 'site-available' and 'site-enabled'

pi@raspberrypi:~ $ sudo ln -s /etc/nginx/sites-available/cocktailengine  /etc/nginx/sites-enabled/cocktailengine

Add user in nginx for external connection (4)

pi@raspberrypi:~ $ sudo sh -c "echo -n 'youname:' >> /etc/nginx/.htpasswd"

indicate your username in 'yourname'

Create pass for user (4)

pi@raspberrypi:~ $ sudo sh -c "openssl passwd -apr1 >> /etc/nginx/.htpasswd"

Supervisor configuration (5)&(6)

Add cocktail-engine.conf

pi@raspberrypi:~ $ sudo touch cocktail-engine.conf

Edit cocktail-engine.conf and add codes below

pi@raspberrypi:~ $ sudo nano cocktail-engine.conf

Change "/home/pi/cocktail_engine/venv/bin/celery" and "/home/pi/cocktail_engine/",for show where is located venv, use

pi@raspberrypi:~ $ cd cocktail_engine
pi@raspberrypi:~/cocktail_engine $ pipenv shell
(cocktail_engine) pi@raspberrypi:~/cocktail_engine $ pipenv --venv
(cocktail_engine) pi@raspberrypi:~/cocktail_engine $ exit

[program:cocktail-engine-celery]
command=/home/pi/cocktail_engine/venv/bin/celery -A cocktail_engine worker --loglevel=INFO
directory=/home/pi/cocktail_engine/
user=pi
numprocs=1
stdout_logfile=/var/log/celery-cocktail-engine.log
stderr_logfile=/var/log/celery-cocktail-engine.log
autostart=true
autorestart=true
startsecs=10

; Need to wait for currently executing tasks to finish at shutdown.
; Increase this if you have very long running tasks.
stopwaitsecs = 600

stopasgroup=true

; Set Celery priority higher than default (999)
; so, if rabbitmq is supervised, it will start first.
priority=1000

[program:cocktail-engine-gunicorn]
command = /home/pi/cocktail_engine/venv/bin/gunicorn cocktail_engine.wsgi:application
user = pi
directory = /home/pi/cocktail_engine
autostart = true
autorestart = true
environment = ENV="PRODUCTION",SECRET_KEY="~CK$8u_\x0bo+S8O\x0b8[dCh*P@FF"

Change the secret key with the random key (https://www.miniwebtool.com/django-secret-key-generator/)

Project configuration

Active pipenv in terminal

pi@raspberrypi:~/cocktail_engine $ pipenv shell

Create database and apply migration

(venv) pi@raspberrypi:~/cocktail_engine $ ./manage.py migrate

Create migration from the engine

(venv) pi@raspberrypi:~/cocktail_engine $ ./manage.py makemigrations engine

Create apply new migrations

(venv) pi@raspberrypi:~/cocktail_engine $ ./manage.py migrate

Apply initial data in the table solenoidValve

(venv) pi@raspberrypi:~/cocktail_engine $ ./manage.py loaddata engine/solenoidvalve.json

⚠️ The solenoid valves and the steps are configured by default. For change the number attributed at relay, it will be necessary to modify "first_pin" and "second_pin" in the database,the steps can be readjusted during the creation of bottles. In the future, I will think about putting a menu to configure the pins ⚠️

Collect static files and answer yes to the question

(venv) pi@raspberrypi:~/cocktail_engine $ ./manage.py collectstatic

Finish

Reboot the raspberry pi

(venv) pi@raspberrypi:~/cocktail_engine $ sudo reboot

If everything has been respected the project should be displayed on the touch screen

How to use the project

Main page

Bottle admin page

Cocktail admin page

Source

• 1. Die-antwort: kiosk mode
• 2. Github : log2ram
• 3. Openclassrooms: deploy an application with django, use the server http nginx
• 4. Digital ocean : How To Set Up Password Authentication with Nginx on Ubuntu 14.04
• 5. Simple is better than complex : How to Use Celery and RabbitMQ with Django
• 6. Openclassrooms : deploy an application with django, Configure Gunicorn and Supervisor