Created
February 26, 2016 05:09
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MQTT Example
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import paho.mqtt.client as mqtt | |
client = mqtt.Client(protocol=mqtt.MQTTv311) | |
client.connect('iot.eclipse.org', port=1883, keepalive=60) | |
client.publish('update', 'hello world') |
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from gevent import monkey | |
monkey.patch_all() | |
import paho.mqtt.client as mqtt | |
import blinker | |
import ssl | |
import logging | |
logging.basicConfig(level=logging.DEBUG) | |
logger = logging.getLogger('mqtt') | |
CODES = { | |
getattr(mqtt, err): err for err in ( | |
'CONNACK_ACCEPTED', | |
'CONNACK_REFUSED_BAD_USERNAME_PASSWORD', | |
'CONNACK_REFUSED_IDENTIFIER_REJECTED', | |
'CONNACK_REFUSED_NOT_AUTHORIZED', | |
'CONNACK_REFUSED_PROTOCOL_VERSION', | |
'CONNACK_REFUSED_SERVER_UNAVAILABLE', | |
) | |
} | |
message_received = blinker.signal('message-received') | |
def on_connect(client, userdata, flags, return_code): | |
if return_code != mqtt.CONNACK_ACCEPTED: | |
raise Exception(CODES[return_code]) | |
logger.info('Connected to %s:%d: %s', | |
client._host, client._port, CODES[return_code]) | |
channels = [ | |
# ("$SYS/#", 0), | |
# ("my/topic", 1), | |
('update', 1), | |
('update/accepted', 1), | |
('update/rejected', 1), | |
('update/delta', 1), | |
('get', 1), | |
('get/accepted', 1), | |
('get/rejected', 1), | |
('delete', 1), | |
('delete/accepted', 1), | |
('delete/rejected', 1), | |
] | |
client.subscribe(channels) | |
logger.info('Subscribed to: %r', channels) | |
def on_message(client, userdata, message): | |
message_received.send( | |
message.topic, | |
payload=message.payload, message=message, client=client, userdata=userdata) | |
@message_received.connect_via('my/topic') | |
@message_received.connect_via('update') | |
@message_received.connect_via('update/accepted') | |
@message_received.connect_via('update/rejected') | |
def debug(sender, payload, **kwargs): | |
print('{topic}: {message}'.format(topic=sender, message=payload)) | |
if __name__ == '__main__': | |
client = mqtt.Client(protocol=mqtt.MQTTv311) | |
client.on_connect = on_connect | |
client.on_message = on_message | |
# client.tls_set( | |
# 'ca.pem', | |
# certfile='client.crt', keyfile='client.key', | |
# cert_reqs=ssl.CERT_REQUIRED) | |
client.connect('iot.eclipse.org', port=1883, keepalive=60) | |
client.loop_forever() # loop_forever() will handle reconnecting for you. If you call disconnect() in a callback it will return. |
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