flask gpio test
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from flask import Flask
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import RPi.GPIO as GPIO
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from flask import Flask, render_template, request
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kamera_server = Flask(__name__)
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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# Create a dictionary called pins to store the pin number, name, and pin state:
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pins = {
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2 : {'name' : 'GPIO 2', 'state' : GPIO.HIGH},
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3 : {'name' : 'GPIO 3', 'state' : GPIO.HIGH}
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}
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# Set each pin as an output and make it low:
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for pin in pins:
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GPIO.setup(pin, GPIO.OUT)
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GPIO.output(pin, GPIO.HIGH)
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@kamera_server.route("/")
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def first_function():
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return "<html><body><h1 style='color:red'>I am hosted on Raspberry Pi !!!</h1></body></html>"
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def main():
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# For each pin, read the pin state and store it in the pins dictionary:
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for pin in pins:
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pins[pin]['state'] = GPIO.input(pin)
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# Put the pin dictionary into the template data dictionary:
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templateData = {
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'pins' : pins
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}
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# Pass the template data into the template main.html and return it to the user
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return render_template('main.html', **templateData)
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# The function below is executed when someone requests a URL with the pin number and action in it:
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@kamera_server.route("/<changePin>/<action>")
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def action(changePin, action):
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# Convert the pin from the URL into an integer:
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changePin = int(changePin)
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# Get the device name for the pin being changed:
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deviceName = pins[changePin]['name']
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# If the action part of the URL is "on," execute the code indented below:
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if action == "on":
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# Set the pin high:
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GPIO.output(changePin, GPIO.HIGH)
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# Save the status message to be passed into the template:
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message = "Turned " + deviceName + " on."
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if action == "off":
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GPIO.output(changePin, GPIO.LOW)
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message = "Turned " + deviceName + " off."
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# For each pin, read the pin state and store it in the pins dictionary:
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for pin in pins:
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pins[pin]['state'] = GPIO.input(pin)
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# Along with the pin dictionary, put the message into the template data dictionary:
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templateData = {
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'pins' : pins
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}
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return render_template('main.html', **templateData)
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if __name__ == "__main__":
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kamera_server.run(host='0.0.0.0')
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@ -24,7 +24,7 @@ sudo raspi-config
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## Zusatzprogramme installieren
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```
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sudo apt install mc git zbar-tools build-essential python-dev
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sudo apt install mc git zbar-tools build-essential python-dev nginx
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```
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## Benutzer anlegen
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@ -66,6 +66,7 @@ deactivate
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```
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cd /opt/kamera
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git clone https://git.jgz-energie.net/ENERGIE/streaming-kamera.git
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```
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Außerhalb der virtuellen Umgebung kann das Programm mit `/opt/kamera/bin/python /opt/kamera/streaming-kamera/kamera.py gestartet` werden.
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@ -79,17 +80,71 @@ Der uWSGI-Server kann mit `/opt/kamera/bin/uwsgi --socket 0.0.0.0:8000 --protoco
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[uwsgi]
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chdir = /opt/kamera/streaming-kamera
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module = kamera_server:server
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module = kamera_server:kamera_server
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master = true
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processes = 1
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threads = 2
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uid = kamera
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gid = kamera
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uid = www-data
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gid = www-data
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socket = /tmp/sample_app.sock
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chmod-socket = 664
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vacuum = true
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die-on-term = true
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```
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/etc/systemd/system/uwsgi.service
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```
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[Unit]
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Description=uWSGI Service
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After=network.target
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[Service]
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User=www-data
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Group=www-data
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WorkingDirectory=/opt/kamera/streaming-kamera/
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ExecStart=/opt/kamera/bin/uwsgi --ini /opt/kamera/uwsgi_config.ini
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[Install]
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WantedBy=multi-user.target
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```
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Dienst starten
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```
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sudo systemctl daemon-reload
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sudo systemctl start uwsgi.service
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sudo systemctl status uwsgi.service
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sudo systemctl enable uwsgi.service
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```
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### nginx anpassen
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```
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sudo rm /etc/nginx/sites-enabled/default
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```
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/etc/nginx/sites-available/kamera_server
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```
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server {
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listen 80;
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server_name localhost;
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location / { try_files $uri @app; }
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location @app {
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include uwsgi_params;
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uwsgi_pass unix:/tmp/kamera_server.sock;
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}
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}
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```
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Konfiguration aktivieren
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```
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sudo ln -s /etc/nginx/sites-available/kamera_server /etc/nginx/sites-enabled
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sudo systemctl restart nginx
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```
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7
templates/css/bootstrap.min.css
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templates/css/bootstrap.min.css
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templates/css/bootstrap.min.css.map
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templates/css/bootstrap.min.css.map
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templates/js/bootstrap.min.js
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templates/js/bootstrap.min.js
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templates/js/bootstrap.min.js.map
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templates/js/bootstrap.min.js.map
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templates/main.html
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templates/main.html
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@ -0,0 +1,23 @@
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<!DOCTYPE html>
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<head>
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<title>RPi Web Server</title>
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<!-- Latest compiled and minified CSS -->
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<link rel="stylesheet" href="/css/bootstrap.min.css">
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<!-- Latest compiled and minified JavaScript -->
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<script src="/js/bootstrap.min.js"></script>
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</head>
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<body>
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<h1>RPi Web Server</h1>
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{% for pin in pins %}
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<h2>{{ pins[pin].name }}
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{% if pins[pin].state == true %}
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ist gerade <strong>an</strong></h2><div class="row"><div class="col-md-2">
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<a href="/{{pin}}/off" class="btn btn-block btn-lg btn-default" role="button">Turn off</a></div></div>
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{% else %}
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ist gerade <strong>aus</strong></h2><div class="row"><div class="col-md-2">
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<a href="/{{pin}}/on" class="btn btn-block btn-lg btn-primary" role="button">Turn on</a></div></div>
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{% endif %}
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{% endfor %}
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</body>
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</html>
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