[Solved] Identify the error in this MQTT Python code snippet: import paho.mqtt.client as mqtt client = mqtt.Client() client.publish('home/light', 'ON') client.connect('broker.hivemq.com', 1883) | Raspberry Pi

Raspberry Pi - MQTT for IoT

Identify the error in this MQTT Python code snippet:

import paho.mqtt.client as mqtt
client = mqtt.Client()
client.publish('home/light', 'ON')
client.connect('broker.hivemq.com', 1883)

AThe client object is not created

BThe topic name is invalid

CThe message 'ON' must be an integer

DThe client should connect before publishing

Step-by-Step Solution

Solution:

Step 1: Check method order
MQTT client must connect to the broker before publishing messages.
Step 2: Verify topic and message validity
The topic 'home/light' is valid and message 'ON' can be a string.
Final Answer:
The client should connect before publishing -> Option D
Quick Check:
Connect first, then publish [OK]

Quick Trick: Always connect before publishing MQTT messages [OK]

Common Mistakes:

MISTAKES

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Identify the error in this MQTT Python code snippet: