You want to send temperature and humidity readings from a Raspberry Pi to an MQTT broker every 10 seconds. Which method is the best practice?

hard🚀 Application Q8 of 15

Raspberry Pi - MQTT for IoT

AUse a loop with <code>time.sleep(10)</code> and publish both readings inside the loop

BPublish temperature and humidity once and rely on MQTT to resend automatically

CPublish only temperature every 10 seconds and humidity every 30 seconds

DPublish data only when sensor values change, ignoring timing

Step-by-Step Solution

Solution:

Step 1: Understand periodic publishing
To send data every 10 seconds, a loop with a delay is appropriate.
Step 2: Publish both readings together
Publishing temperature and humidity together ensures synchronized data.
Step 3: Evaluate other options
Relying on MQTT to resend or publishing irregularly is not reliable for periodic data.
Final Answer:
Use a loop with time.sleep(10) and publish both readings inside the loop -> Option A
Quick Check:
Periodic loop with sleep for timed publishing [OK]

Quick Trick: Use timed loops to publish sensor data regularly [OK]

Common Mistakes:

MISTAKES

Master "MQTT for IoT" in Raspberry Pi

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Raspberry Pi Quizzes