MQTT single message
Imagine the following scenario: You have been given an MQTT Broker address and a topic name, and you are supposed to write some code to store the contents of the Datastream.
First, you should check what format the messages will be in by consuming a single message.
You can then print and inspect the message to determine how to process the data further.
This will be our basis for the next exercise, where we will be subscribing to the data stream and collecting multiple messages.
This exercise is part of the course
Analyzing IoT Data in Python
Exercise instructions
- Import the MQTT library
paho.mqtt.subscribeassubscribe. - Retrieve one message from the topic
"datacamp/iot/simple"and store the result asmsg. - Print topic and payload from the message, separated by a comma.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Import mqtt library
import ____ as ____
# Retrieve one message
msg = ____.____(____, hostname="mqtt.datacamp.com")
# Print topic and payload
print(f"{____}, {____}")