In termina, install the paho-mqtt module with pip using the following command: Sudo pip3 install paho-mqtt Create a new folder by the name of lab_6 and create a new python file mqtt_script_1.py In the file, TYPE the following code: import paho.mqtt.client as mqtt # The callback for when the client receives a CONNACK response from the server. def on_connect(client, userdata, flags, 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("etec224_mqtt_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("broker.emqx.io", 1883, 60) client.loop_forever() Create another file py and add the following code to it. import paho.mqtt.client as mqtt import time # The callback for when the client receives a CONNACK response from the server. def on_connect(client, userdata, flags, 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("etec224_mqtt_test/") global Connected Connected = True Connected = False client = mqtt.Client() client.on_connect = on_connect client.connect("broker.emqx.io", 1883, 60) client.loop_start() while Connected!= True: #Wait Here time.sleep(0.1) try: while True: value = input('Enter Message : ') client.publish('etec224_mqtt_test/', value) except KeyboardInterrupt: client.disconnect() client.loop_stop() Run the first script by typing in the command python3 mqtt_script_1.py Open up a new terminal and navigate to the folder where the two scripts are created. Run the second script in the new window by typing the command python3 mqtt_script_2.py Any message typed in the second window should appear in the first window. If the same code is experimented with by all the students in the class, then all messages from all the students will appear in all the output windows across the lab.

In termina, install the paho-mqtt module with pip using the following command: Sudo pip3 install paho-mqtt Create a new folder by the name of lab_6 and create a new python file mqtt_script_1.py In the file, TYPE the following code: import paho.mqtt.client as mqtt # The callback for when the client receives a CONNACK response from the server. def on_connect(client, userdata, flags, 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("etec224_mqtt_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("broker.emqx.io", 1883, 60) client.loop_forever() Create another file py and add the following code to it. import paho.mqtt.client as mqtt import time # The callback for when the client receives a CONNACK response from the server. def on_connect(client, userdata, flags, 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("etec224_mqtt_test/") global Connected Connected = True Connected = False client = mqtt.Client() client.on_connect = on_connect client.connect("broker.emqx.io", 1883, 60) client.loop_start() while Connected!= True: #Wait Here time.sleep(0.1) try: while True: value = input('Enter Message : ') client.publish('etec224_mqtt_test/', value) except KeyboardInterrupt: client.disconnect() client.loop_stop() Run the first script by typing in the command python3 mqtt_script_1.py Open up a new terminal and navigate to the folder where the two scripts are created. Run the second script in the new window by typing the command python3 mqtt_script_2.py Any message typed in the second window should appear in the first window. If the same code is experimented with by all the students in the class, then all messages from all the students will appear in all the output windows across the lab.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Related questions

Question

In termina, install the paho-mqtt module with pip using the following command:

Sudo pip3 install paho-mqtt

Create a new folder by the name of lab_6 and create a new python file mqtt_script_1.py

In the file, TYPE the following code:

import paho.mqtt.client as mqtt

# The callback for when the client receives a CONNACK response from the server.

def on_connect(client, userdata, flags, 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("etec224_mqtt_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("broker.emqx.io", 1883, 60)

client.loop_forever()

Create another file py and add the following code to it.

import paho.mqtt.client as mqtt

import time

# The callback for when the client receives a CONNACK response from the server.

def on_connect(client, userdata, flags, 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("etec224_mqtt_test/")

global Connected

Connected = True

Connected = False

client = mqtt.Client()

client.on_connect = on_connect

client.connect("broker.emqx.io", 1883, 60)

client.loop_start()

while Connected!= True:

#Wait Here

time.sleep(0.1)

try:

while True:

value = input('Enter Message : ')

client.publish('etec224_mqtt_test/', value)

except KeyboardInterrupt:

client.disconnect()

client.loop_stop()

Run the first script by typing in the command

python3 mqtt_script_1.py

Open up a new terminal and navigate to the folder where the two scripts are created.

Run the second script in the new window by typing the command

python3 mqtt_script_2.py

Any message typed in the second window should appear in the first window. If the same code is experimented with by all the students in the class, then all messages from all the students will appear in all the output windows across the lab.

Expert Solution