Python MQTT Experiment

Both client:

• pub_1.py

  ImportPaho.mqtt.client as MqttImport TimeImportSYSImportRandomdefon_connect (client, UserData, flags, RC):Print("connected with result code"+str (RC))defon_publish (client, UserData, mid):Print("Publish au/csie/5/9/5912/temperture",) client=Mqtt. Client () Client.on_connect=On_connectclient.on_publish=On_publishclient.connect ("iot.eclipse.org", 1883, 60) whileTrue:Try: With open ("C:\\users\\86390\\desktop\\test_s.txt","R") as F:data=F.readlines ()#data = Random.randint (.)        #client.publish ("Au/csie/5/9/5912/tempeture", str (data) + "C")        Print(len (data)) Time.sleep (2)    exceptKeyboardinterrupt:Print("EXIT") Client.disconnect () sys.exit (0)

• sub_1.py

  ImportPaho.mqtt.client as MqttImport TimeImportSYSImportRandomdefon_connect (client, UserData, flags, RC):Print("Connected with result code"+str (RC)) Client.subscribe ("/inode/mychannel")defon_message (client, UserData, msg):Print(Len (str (msg.payload))/1024/1024) Client=Mqtt. Client () Client.on_connect=On_connectclient.on_message=On_messageclient.connect ("127.0.0.1", 1883, 60) Client.loop_forever ()

Publisher and Client:

• pub_2.py

  ImportPaho.mqtt.publish as PublishImport TimedefTransmitmqtt (STRMSG): Strmqttbroker="localhost"    #strbroker = "127.0.0.1"Strmqttchannel ="/inode/mychannel"    Print(Len (str (STRMSG))) Publish.single (Strmqttchannel, STRMSG, hostname=strmqttbroker)if __name__=='__main__':     whileTrue:transmitmqtt ("a"*1024*1024*40) Time.sleep (0.1)        Print(Time.time ())

• sub_2.py

  ImportPaho.mqtt.client as MqttImport TimeImportSYSImportRandomdefon_connect (client, UserData, flags, RC):Print("Connected with result code"+str (RC)) Client.subscribe ("/inode/mychannel")defon_message (client, UserData, msg):Print(Len (str (msg.payload))/1024/1024) Client=Mqtt. Client () Client.on_connect=On_connectclient.on_message=On_messageclient.connect ("127.0.0.1", 1883, 60) Client.loop_forever ()

Keng:

• The two clients that normally communicate on Windows, which are not received on the sub side of the virtual machine, could be a DNS network management problem.
• Two client communication, the intermediary broker must be built, but if it is a pub, a sub, it is directly through the local host as the broker.

Python MQTT Experiment