is there any support in python to subscribe on mqtt broker with port 8080
import sys
import paho.mqtt.client as mqtt
def on_connect(mqttc, obj, flags, rc):
print("rc: "+str(rc))
def on_message(mqttc, obj, msg):
print(msg.topic+" "+str(msg.qos)+" "+str(msg.payload))
def on_publish(mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(mqttc, obj, level, string):
print(string)
mqttc = mqtt.Client()
mqttc.on_message = on_message
mqttc.on_connect = on_connect
mqttc.on_publish = on_publish
mqttc.on_subscribe = on_subscribe
mqttc.connect("test.mosquitto.org", 8080, 60)
mqttc.subscribe("test/iot", 0)
mqttc.loop_forever()
i can not connect with this code. Mosquitto has websocket support at port 8080 but this paho library does not work for it. any solution for python?
i am using python 2.7 on windows 10.
The Paho MQTT module introduced websocket support some days ago. I don't think it is released yet, but you can install from the master under Linux branch using
pip install git+git://github.com/eclipse/paho.mqtt.python.git
Also works under windows. (Thanks for info from the comments)
You can use the websockets as transport by connecting with
mqttc = mqtt.Client(transport="websockets")
UPDATE:
If you try to use the websocket protocol with the python client because you also need to connect a browser client (for example MQTT.js) then you can also configure mosquitto to listen to websockets and the normal mqtt protocol.
Simply create a configuration file for example in
/etc/mosquitto/mosquitto.conf
with the following contents:
listener 1883
protocol mqtt
listener 9001
protocol websockets
Then you can then run mosquitto with
mosquitto -c /etc/mosquitto/mosquitto.conf
You should see similar output:
1469015320: mosquitto version 1.4.8 (build date 2016-05-3112:07:40+0200) starting
1469015320: Config loaded from /etc/mosquitto/mosquitto1.conf.
1469015320: Opening ipv4 listen socket on port 1883.
1469015320: Opening ipv6 listen socket on port 1883.
1469015320: Opening websockets listen socket on port 9001.
Your python client then connects to port 1883 and the browser client to 9001
You can use what-mqtt browser client to test the websocket listener. Just point it to ws://localhost:9001
Between Feb and now the paho.mqtt.python codebase has been fixed. Just add transport='websockets' as Fl0v0 suggested, it simply works. Below is the full code which subscribes to everything or everything under $SYS/. The code tested is on the master branch with commit hash e56f913 on June 3 of 2016.
#!/usr/bin/python
import sys
import paho.mqtt.client as mqtt
def on_connect(mqttc, obj, flags, rc):
print("rc: "+str(rc))
def on_message(mqttc, obj, msg):
print(msg.topic+" "+str(msg.qos)+" "+str(msg.payload))
def on_publish(mqttc, obj, mid):
print("mid: "+str(mid))
def on_subscribe(mqttc, obj, mid, granted_qos):
print("Subscribed: "+str(mid)+" "+str(granted_qos))
def on_log(mqttc, obj, level, string):
print(string)
mqttc = mqtt.Client(transport='websockets')
mqttc.on_message = on_message
mqttc.on_connect = on_connect
mqttc.on_publish = on_publish
mqttc.on_subscribe = on_subscribe
mqttc.connect("test.mosquitto.org", 8080, 60)
mqttc.subscribe("#", 0)
#mqttc.subscribe("$SYS/#", 0)
mqttc.loop_forever()
Update: The code above does not work on Windows 7 with python 2.7.6 that I tested with, by invoking from one version of Cygwin (not the cygwin python though). None of the topic "#" or "$SYS/#" gives any published message back.
Instead, pub or sub to solid topics works as the example follows. Patch paho.mqtt.python examples/pub-single.py and examples/sub-simple.py. Then run sub-simple.py in one terminal. Run pub-single.py in another terminal, twice. The subscriber terminal will print out two messages published by the publisher.
Patch to examples/pub-single.py:
-publish.single("paho/test/single", "boo", hostname="test.mosquitto.org")
+publish.single("/HelloWorld", "boo", hostname="test.mosquitto.org",
+ port=8080, transport='websockets')
Patch to examples/sub-simple.py:
-topics = ['#']
+topics = ['/HelloWorld']
-m = subscribe.simple(topics, hostname="iot.eclipse.org", retained=False, msg_count=2)
+m = subscribe.simple(topics, hostname="test.mosquitto.org",
+ retained=False, msg_count=2,
+ port=8080, transport='websockets')
No, the Python version of the Paho library does not support MQTT over Websockets.
In fact I believe the only native client side (not in a browser) MQTT library that supports MQTT over Websockets is the NodeJS module (https://www.npmjs.com/package/mqtt)
Related
python code
import time
broker = "test.mosquitto.org"
port=8884
conn_flag= False
def on_connect(client, userdata, flags, rc):
global conn_flag
conn_flag=True
print("connected",conn_flag)
conn_flag=True
def on_log(client, userdata, level, buf):
print("buffer", buf)
def on_disconnect(client, userdata, rc):
print("client disconnected ok")
client1= paho.Client("control")
client1.on_log=on_log
client1.tls_set('C:\etc\mosquitto\certs\mosquitto.org.crt')
client1.on_connect = on_connect
client1.on_disconnect = on_disconnect
client1.connect(broker,port)
while not conn_flag:
time.sleep(1)
print("waiting", conn_flag)
client1.loop()
time.sleep(3)
print("publishing")
client1.publish("house/bulb", "Test")
time.sleep(2)
client1.loop()
time.sleep(2)
client1.disconnect()
I am using the mosquitto.org.crt (PEM format) file gave by test.mosquitto.org, currently can't get to connect on port 8884, conn_flag is always false what should I do?
As per http://test.mosquitto.org the ports are:
8883 : MQTT, encrypted, unauthenticated
8884 : MQTT, encrypted, client certificate required
In your code client1.tls_set('C:\etc\mosquitto\certs\mosquitto.org.crt') you are setting the ca_cert - the params being:
tls_set(ca_certs=None, certfile=None, keyfile=None, cert_reqs=ssl.CERT_REQUIRED, tls_version=ssl.PROTOCOL_TLS, ciphers=None)
This would be sufficient to connect to port 8883 (and your code connects to that port successfully for me). A connection to port 8883 will be encrypted and the client can confirm the identify of the server; however the client does not have to provide a client certificate (to identify itself).
To connect to port 8884 you have to provide a client certificate (used to authenticate the client) - i.e. the certfile and keyfile arguments. An appropriate certificate can be requested here.
I want to test the mosquitto MQTT Python client ports.
import json
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
"""Called when connected to MQTT broker."""
client.subscribe("hermes/intent/#")
client.subscribe("hermes/nlu/intentNotRecognized")
print("Connected. Waiting for intents.")
def on_disconnect(client, userdata, flags, rc):
"""Called when disconnected from MQTT broker."""
client.reconnect()
def on_message(client, userdata, msg):
"""Called each time a message is received on a subscribed topic."""
nlu_payload = json.loads(msg.payload)
if msg.topic == "hermes/nlu/intentNotRecognized":
sentence = "Unrecognized command!"
print("Recognition failure")
else:
# Intent
print("Got intent:", nlu_payload["intent"]["intentName"])
# Speak the text from the intent
sentence = nlu_payload["input"]
site_id = nlu_payload["siteId"]
client.publish("hermes/tts/say", json.dumps({"text": sentence, "siteId": site_id}))
# Create MQTT client and connect to broker
client = mqtt.Client()
client.on_connect = on_connect
client.on_disconnect = on_disconnect
client.on_message = on_message
client.connect("localhost", 1883)
client.loop_forever()
I run it with the command
$ python script.py`
Connected. Waiting for intents.
Does mosquitto send a POST request? or do I have to start a request with mosquitto? How should I create a request so that I get
Got intent: SetTimer
MQTT is not HTTP, POST is a HTTP verb that has no meaning in a MQTT context.
MQTT is a pub/sub protocol, where as HTTP is a request/response protocol.
The code you have posted only subscribes to 2 topics, it doesn't publish anything (until it receives a message). So unless you have another application that will publish a message to 1 of the 2 topics the python code has subscribed to it will just sit there and wait for a message.
You can use the mosquitto command line tools to send a message if needed. e.g.
mosquitto_pub -t hermes/intent/foo -m '{"intent": { "intentName": "SetTimer"}}'
I've been trying to find answers or info about this question but without results yet. The idea is to publish the same topic into two different MQTT servers with python. I mean, something like this:
import paho.mqtt.client as paho
import datetime, time
mqttc = paho.Client()
host1 = "broker.hivemq.com" # the address of 1st mqtt broker
host2 = "192.168.1.200" # the address of 2nd mqtt broker
topic= "testingTopic"
port = 1883
def on_connect(mosq, obj, rc):
print("on_connect() "+str(rc))
mqttc.on_connect = on_connect
print("Connecting to " + host)
mqttc.connect(host1, port, 60)
mqttc.connect(host2, port, 60)
while 1:
# publish some data at a regular interval
now = datetime.datetime.now()
mqttc.publish(topic, now.strftime('%H:%M:%S')) #Publishing to MQTT1
mqttc.publish(topic, now.strftime('%H:%M:%S')) #Publishing to MQTT2
time.sleep(1)
So, the question is about the while statment... how can I do to publish the same topic into MQTT1 and MQTT2?
As you can see, I want to have to posibility to publish that payload in MQTT broker that is running in internet, but if I lose internet connection, then I can pub/sub to MQTT broker in my LAN.
You can't just connect the same client to 2 different brokers. You need 2 separate instances of the of the client that you connect to the separate brokers.
...
mqttc1 = paho.Client()
mqttc2 = paho.Client()
...
mqttc1.connect(host1, port, 60)
mqttc2.connect(host2, port, 60)
...
mqttc1.publish(topic, now.strftime('%H:%M:%S')) #Publishing to MQTT1
mqttc2.publish(topic, now.strftime('%H:%M:%S')) #Publishing to MQTT2
I'm using the following code from MQTT Paho project to subscribe to messages from my mqtt broker. I tested the connection using mosquitto_sub and I receive the messages there. However, when I run the following code it doesn't receive any messages and no output is printed. I checked the topic and host.
import paho.mqtt.client as mqtt
# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, rc):
print("Connected with result code "+str(rc))
# Subscribing in on_connect() means that if we lose the connection and
# reconnect then subscriptions will be renewed.
client.subscribe("test")
# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("localhost", 1883, 60)
client.loop_forever()
The following error is logged by the broker:
Invalid protocol "MQTT" in CONNECT from ::1.
Socket read error on client (null), disconnecting.
EDIT Thanks to #hardillb for pointing out the outdated MQTT version.
Everything worked after I did the following:
sudo apt-get purge mosquitto
sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update
sudo apt-get install mosquitto
This is most likely because you are using an old version of mosquitto and the python is expecting a newer build that supports MQTT 3.1.1
Try changing the code as shown:
import paho.mqtt.client as mqtt
# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, rc):
print("Connected with result code "+str(rc))
# Subscribing in on_connect() means that if we lose the connection and
# reconnect then subscriptions will be renewed.
client.subscribe("test")
# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
# Change made HERE
client = mqtt.Client(protocol=MQTTv31)
client.on_connect = on_connect
client.on_message = on_message
client.connect("localhost", 1883, 60)
client.loop_forever()
You should also upgrade your broker as soon as possible, that version is incredibly out of date and has a number of known issues, the current version is 1.4.10
I have a remote server running mosquitto. I can connect to this server and exchange messages using mosquitto_pub and mosquitto_sub. If i try the same using some python with paho.mqtt.client I get no connection. My script keeps running but the on_connection hook is never called.. The same scripts however work flawlessly with my local mosquitto server.
What could possibly be the reason for the connection problems? How can I get some more feedback on what's happening? Any suggestions?
EDIT: I added a minimal code example
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
print("Yeeha")
client.subscribe("botgrid/init", qos=2)
def on_message(client, userdata, msg):
print(msg.payload)
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("localhost")
print("Waiting for connection...")
client.loop_forever()
EDIT 2: While playing around, I noted that replacing "localhost" with "test.mosquitto.org" resulted in OSError: [Errno 101] Network is unreachable although I have no problems connecting to it via mosquitto_sub
Does this code produce the same problem? This is probably the equivalent to the code at the point that it is failing.
import socket
sock = socket.create_connection(("test.mosquitto.org", 1883))