Create app.py

app.py

@@ -0,0 +1,88 @@
+import logging
+import json
+from flask import Flask, render_template
+from flask_mqtt import Mqtt
+from flask_socketio import SocketIO
+from flask_bootstrap import Bootstrap
+
+# import libraries
+
+
+app = Flask(__name__)
+port = 1883
+host = 'localhost'
+# create  an instance of Flask and set the parameters of host
+
+
+app.config['SECRET'] = 'LASSE'
+app.config['TEMPLATES_AUTO_RELOAD'] = True
+app.config['MQTT_BROKER_URL'] = host
+app.config['MQTT_BROKER_PORT'] = port
+app.config['MQTT_CLIENT_ID'] = 'flask_mqtt'
+app.config['MQTT_CLEAN_SESSION'] = True
+app.config['MQTT_USERNAME'] = ''
+app.config['MQTT_PASSWORD'] = ''
+app.config['MQTT_KEEPALIVE'] = 5
+app.config['MQTT_TLS_ENABLED'] = False
+app.config['MQTT_LAST_WILL_TOPIC'] = 'home/lastwill'
+app.config['MQTT_LAST_WILL_MESSAGE'] = 'bye'
+app.config['MQTT_LAST_WILL_QOS'] = 2
+
+# set others parameters of app.config
+
+
+# Parameters for SSL enabled
+# app.config['MQTT_BROKER_PORT'] = 8883
+# app.config['MQTT_TLS_ENABLED'] = True
+# app.config['MQTT_TLS_INSECURE'] = True
+# app.config['MQTT_TLS_CA_CERTS'] = 'ca.crt'
+
+
+mqtt = Mqtt(app)
+socketio = SocketIO(app)
+bootstrap = Bootstrap(app)
+
+
+@app.route('/')  # rout of homepage, return index.html
+def index():
+    return render_template('index.html')
+
+# when using SocketIO, messages are received by both parties as events.
+
+
+@socketio.on('publish')  # receive the message typed by the user and publish with json in topic, send message and qos.
+def handle_publish(json_str):
+    data = json.loads(json_str)
+    mqtt.publish(data['topic'], data['message'], data['qos'])
+
+
+@socketio.on('subscribe')  # subscribe to a certain topic
+def handle_subscribe(json_str):
+    data = json.loads(json_str)
+    mqtt.subscribe(data['topic'], data['qos'])
+
+
+@socketio.on('unsubscribe_all')  # unsubscribe from a single topic
+def handle_unsubscribe_all():
+    mqtt.unsubscribe_all()
+
+
+@mqtt.on_message()  # Decorator to handle all messages that have been subscribed and that are not handled via the
+# on_message decorator.
+def handle_mqtt_message(client, userdata, message):
+    data = dict(
+        topic=message.topic,
+        payload=message.payload.decode(),
+        qos=message.qos,
+    )
+    socketio.emit('mqtt_message', data=data)
+
+
+@mqtt.on_log()  # enable log
+def handle_logging(client, userdata, level, buf):
+    print(level, buf)
+    pass
+
+
+if __name__ == '__main__':
+    socketio.run(app, host='0.0.0.0', port=5000, use_reloader=False, debug=True)