MQTT 5 Essentials Part 09 - Topic Alias
MQTT 5 Essentials Part 09 – Topic Alias
What is the purpose of the new Topic Alias feature?
Topic Aliases are used to substitute a defined number of topic strings with integers. MQTT client and MQTT broker can negotiate to which extend Topic Aliases are supported. Both the client and broker can define a Topic Alias for a PUBLISH message, as long as they are the respective sender.
Example:
Imagine a really long and complex topic name to describe the current power consumption of a specific junction box
"data/europe/germany/south/bavaria/munich/schwabing/box-32543y/junction/consumption"
This topic name can be substituted by a single integer: 1
Use Cases:
• Mapping of Topic Alias to Topic is always only relevant
for a single client-broker connection
• Topic Aliases are very useful in specific use cases where
payloads are relatively small
topics are relatively long
message throughput is relatively high
This is where the MQTT 5 Topic Alias feature really shines!
👉 Be sure to watch our first video series - MQTT Essentials - about the basic concepts of MQTT: • What is MQTT | MQTT Essentials Part 1
👉 We have a detailed blog series explaining all the new features available in MQTT 5: https://bit.ly/3zVD3Tz
👉 We also explain the core of MQTT, its features, and other essential information in this HiveMQ blog series: https://bit.ly/2Y7JHJn
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👉 We're looking forward to seeing you for MQTT 5 Essentials part 10 - Enhanced Authentication:
• MQTT 5 Essentials Part 10 - Enhanced...
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