pip install --extra-index-url https://package-read:gkYP4xrm2PxicUbW1wra@git-ce.rwth-aachen.de/api/v4/projects/1708/packages/pypi/simple wzl-mqtt

# username and password required to connect to the broker
MQTT_USER = ""
MQTT_PASSWORD = ""

# address, port and virtual host of the broker to connect to 
MQTT_BROKER = "127.0.0.1"
MQTT_PORT = 1883
MQTT_VHOST = "/"

# initialize publisher and connect to the broker
client = mqtt.MQTTPublisher()
client.connect(MQTT_BROKER, MQTT_PORT, MQTT_USER, MQTT_PASSWORD, vhost=MQTT_VHOST)

# create message and publish the message as UTF-8 encoded string
message = json.dumps({"value": [random.uniform(0, 5) for i in range(3)], "timestamp": datetime.datetime.utcnow().isoformat() + "Z",
                                  "covariance": [[2, 0, 0], [0, 2, 0], [0, 0, 0]], "nonce": str(uuid.uuid4()), "hash": None, "unit": "MTR"})
client.publish(MQTT_USER + "/channel-001", message.encode("utf-8"))

# username and password required to connect to the broker
MQTT_USER = ""
MQTT_PASSWORD = ""

# address, port and virtual host of the broker to connect to 
MQTT_BROKER = "127.0.0.1"
MQTT_PORT = 1883
MQTT_VHOST = "/"

# initialize logger
logger = mqtt.Logger.get('Receiver') # change 'Receiver' to any string you like

# define callback which will be executed when a message is received
def print_mqtt_message(topic, message):
        logger.info("### {} ###\r\n{}\r\n".format(topic, message.decode("utf-8")))

# initialize subscriber and connect to the broker   
client = mqtt.MQTTSubscriber()
client.connect(MQTT_BROKER, MQTT_PORT, MQTT_USER, MQTT_PASSWORD, vhost=MQTT_VHOST)

# register the callback and subscribe topic
client.set_callback("PRINT", print_mqtt_message)
client.subscribe('#')

# start waiting loop to prevent program from exiting
while True:
    try:
        time.sleep(1)
    except KeyboardInterrupt:
        break