Can client know whether it is a retained message or not?

This page summarizes the projects mentioned and recommended in the original post on /r/MQTT

InfluxDB - Power Real-Time Data Analytics at Scale
Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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  • pubsubclient

    A client library for the Arduino Ethernet Shield that provides support for MQTT.

    • I am using this MQTT client library for Arduino/ESP, and its API is like this page. The callback function for message reception event is like the following:

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

    InfluxDB logo
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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