Getting error when trying to run mqtt_client on raspbberry pi 3 with Pixel OS

Question

Please find the script that I am trying to run below:

def initialize(global_listener):
   global MQTT_CLIENT
   global SUBSCRIBERS_ACTIVE_COUNT
   SUBSCRIBERS_ACTIVE_COUNT = 0
   MQTT_CLIENT = setup_mqtt_client()
   global_listener.set_client(MQTT_CLIENT)
   subscribe_and_listen(MQTT_CLIENT)


def subscribe_and_listen(client):
   # Start subscribe, with QoS level 1
   global UUID
   client.subscribe(str(UUID), 1)
   client.subscribe("status_channel", 1)
   client.subscribe("status_channel/"+str(UUID), 1)

   rc = 0
   while rc == 0:
     rc = client.loop()
     handle_exception(client=client, rc=rc)
     LOG.debug("rc: " + str(rc))

 def setup_mqtt_client():
     client = paho.Client(client_id=UUID, clean_session=True, userdata=None,           protocol=paho.MQTTv31)
     # Assign event callbacks
     client.on_message = on_message
     client.on_connect = on_connect
     client.on_disconnect = on_disconnect
     client.on_publish = on_publish
     client.on_subscribe = on_subscribe
     client.on_log = on_log
     client.will_set("status_channel/ws_hot",     payload=get_last_will_payload(UUID), qos=1, retain=False)
     url = urlparse.urlparse(os.environ.get('CLOUDMQTT_URL', 'tcp://<mqtt-server-ip>:1883'))

     # Connect
     client.username_pw_set("<username>", "<password>")
     client.connect(url.hostname, url.port)#, keepalive=20)

     return client

But on running the above script I am getting the following error:

Traceback (most recent call last):
   File "src/mqtt_client.py", line 142, in <module>
     initialize(JOB_HANDLER)
   File "src/mqtt_client.py", line 115, in initialize
     MQTT_CLIENT = setup_mqtt_client()
   File "src/mqtt_client.py", line 106, in setup_mqtt_client
     client.connect(url.hostname, url.port)#, keepalive=20)
   File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 686, in connect
     return self.reconnect()
    File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 808, in reconnect
     sock = socket.create_connection((self._host, self._port), source_address=(self._bind_address, 0))
    File "/usr/lib/python2.7/socket.py", line 571, in create_connection
     raise err
socket.error: [Errno 113] No route to host

I couldn't find the answer anywhere. Please help.

P.S. : I have tried disabling firewall and clearing out iptables on raspberry pi to not relief.

Have you checked that url.host is actually what you expect it to be? Can you ping that address from the command line? — hardillb, Mar 09 '17 at 12:56
@hardillb I had done the basic debugging only then I posted a question here. I had tried pinging the host using a windows machine using same script and it was working seamlessly. So what I finally figured out that there are some configuration related problems with Pixel, which have been solved in latest release and can be resolved by doing a firmware update. — Shikhar Srivastava, Mar 10 '17 at 22:09

score 0 · Accepted Answer · answered Mar 09 '17 at 12:50

There is some issue with Raspberry Pi Jessie distribution with Pixel. Running the following command to update firmware solved my problem

rpi-update

This may take upto 10-15 minutes for full update to complete. Bare with it, and reboot after doing the firmware update

Getting error when trying to run mqtt_client on raspbberry pi 3 with Pixel OS

1 Answers1

rpi-update