IoT analytics and dashboards in IOT Protocols - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to subscribe to the MQTT topic for receiving sensor data.

IOT Protocols

client.subscribe('[1]')

Drag options to blanks, or click blank then click option'

Adisconnect

Bconnect

Csensor/data

Dpublish

Attempts:

3 left

💡 Hint

Common Mistakes

Using MQTT client methods like 'connect' or 'publish' instead of a topic name.

The MQTT client subscribes to the topic sensor/data to receive sensor data messages.

2fill in blank

medium

Complete the code to filter incoming data points where temperature is above 30 degrees.

IOT Protocols

filtered_data = [d for d in data if d['temperature'] [1] 30]

Drag options to blanks, or click blank then click option'

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' or '<=' which would filter lower temperatures.

The filter keeps data points where temperature is greater than 30.

3fill in blank

hard

Fix the error in the code to publish JSON data to the MQTT topic.

IOT Protocols

client.publish('sensor/data', [1].dumps(payload))

Drag options to blanks, or click blank then click option'

Axml

Bjson

Cyaml

Dcsv

Attempts:

3 left

💡 Hint

Common Mistakes

Using unsupported formats like 'yaml', 'xml', or 'csv' which cause errors.

The json.dumps() function converts the payload dictionary to a JSON string for publishing.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps device IDs to their latest temperature readings if above 25.

IOT Protocols

{device['id']: device['temperature'] for device in devices if device['temperature'] [1] [2]

Drag options to blanks, or click blank then click option'

A>

B25

C<

D30

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' or wrong threshold values which filter incorrect devices.

The comprehension filters devices with temperature greater than 25 and maps their IDs to temperatures.

5fill in blank

hard

Fill all four blanks to create a dictionary comprehension that maps sensor names in uppercase to their values if the value is below 50.

IOT Protocols

{ [1]: [2] for [3], [4] in sensors.items() if [2] < 50 }

Drag options to blanks, or click blank then click option'

Aname.upper()

Bvalue

Cname

Dsensor

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names or forgetting to convert names to uppercase.

The comprehension maps sensor names converted to uppercase to their values, filtering values below 50.