Initial implementation

__init__.py

@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+"""
+mqtt (MQTT)
+===========
+
+**Author:**
+
+* Dirk Alders <sudo-dirk@mount-mockery.de>
+
+**Description:**
+
+    This Module supports functionality for mqtt connections
+
+**Submodules:**
+
+* :mod:`mqtt_client`
+
+**Unittest:**
+
+        See also the :download:`unittest <mqtt/_testresults_/unittest.pdf>` documentation.
+
+**Module Documentation:**
+
+"""
+
+__DEPENDENCIES__ = []
+
+import logging
+import paho.mqtt.client as paho
+import socket
+
+try:
+    from config import APP_NAME as ROOT_LOGGER_NAME
+except ImportError:
+    ROOT_LOGGER_NAME = 'root'
+logger = logging.getLogger(ROOT_LOGGER_NAME).getChild(__name__)
+
+
+class mqtt_client(object):
+    def __init__(self, name, host, port=1883, username=None, password=None):
+        logger.info("Initiating mqtt client instance")
+        self.__callbacks__ = {}
+        self.__client__ = paho.Client(name)                                     # create client object
+        if username is not None and password is not None:
+            logger.debug("Configuring authentification")
+            self.__client__.username_pw_set(username, password)                 # login with credentials
+        self.__client__.on_message = self.__receive__                           # attach function to callback
+        self.__client__.on_connect = self.__on_connect__
+        self.__client__.on_disconnect = self.__on_disconnect__
+        try:
+            self.__client__.connect(host, port)                                 # establish connection
+        except (socket.timeout, OSError) as e:
+            logger.warning("Can not connect to MQTT-Server")
+        self.__client__.loop_start()                                            # start the loop
+
+    def add_callback(self, topic, callback):
+        self.__callbacks__[topic] = callback
+        self.__client__.subscribe(topic)
+
+    def send(self, topic, payload):
+        self.__client__.publish(topic, payload)
+
+    def __on_connect__(self, client, userdata, flags, rc):
+        logger.debug("Connect with rc=%d", rc)
+        if rc == 0:
+            logger.debug("Registering topics...")
+            for topic in self.__callbacks__:
+                self.__client__.subscribe(topic)
+ 
+    def __on_disconnect__(self, client, flags, rc):
+        logger.warning("Disconnect with rc=%d", rc)
+
+    def __receive__(self, client, userdata, message):
+        logger.debug("Received message with topic %s and payload %s", message.topic, str(message.payload))
+        for topic in self.__callbacks__:
+            if topic.endswith('#'):
+                if message.topic.startswith(topic[:-1]):
+                    self.__callbacks__[topic](client, userdata, message)
+            else:
+                if topic == message.topic:
+                    self.__callbacks__[topic](client, userdata, message)

_examples_/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>mqtt</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.python.pydev.PyDevBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.python.pydev.pythonNature</nature>
+	</natures>
+</projectDescription>

_examples_/.pydevproject

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?eclipse-pydev version="1.0"?><pydev_project>
+    <pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
+        <path>/${PROJECT_DIR_NAME}</path>
+    </pydev_pathproperty>
+    <pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python interpreter</pydev_property>
+    <pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
+</pydev_project>

_examples_/mqtt

@@ -0,0 +1 @@
+..

_examples_/test.py

@@ -0,0 +1,21 @@
+import mqtt
+import time
+import logging
+import sys
+
+root = logging.getLogger('root')
+root.setLevel(logging.DEBUG)
+
+handler = logging.StreamHandler(sys.stdout)
+handler.setLevel(logging.DEBUG)
+formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+handler.setFormatter(formatter)
+root.addHandler(handler)
+
+def print_msg(client, userdata, message):
+    print("Received ", message.topic, ": ", str(message.payload))
+
+c = mqtt.mqtt_client('test', '192.168.0.2', username='', password='')
+c.add_callback('ambient/#', print_msg)
+while True:
+    time.sleep(1)

requirements.txt

@@ -0,0 +1 @@
+paho-mqtt