What Are Retained Messages?
If you know MQTT even for just a little bit, you may already know that for each MQTT message, there is a topic name, and there is the payload. If you dig a little deeper, you’ll find that there are also message properties and flags. One of the flags is called Retain
, which is what this post is about.
Upon receiving a message with the Retain
flag set, the MQTT broker must store the message for the topic to which the message was published, and it must store only the latest message. So the subscribers which are interested in this topic can go offline, and reconnect at any time to receive the latest message instead of having to wait for the next message from the publisher after the subscription.
A man vs. himself essay is a reflection of the centrality of God within the human soul. God is the source of human emotions, the object of our will, and the object of our forgiveness,...
The post A Man Vs. Himself Essay appeared first on 85ideas.com.
For many data teams, the past five years have witnessed an evolution of technology, teams, and processes that calls to mind another significant period in time: the Industrial Revolution.
From the late 18th century to the mid-19th century, the Industrial Revolution transformed economies with new tools, cheaper power sources, and more streamlined ways of organizing work in factories. And even now, visit a modern printing plant, and you’ll find a state-of-the-art operation with advanced tech and robotics.
If you are into social media, you know how hard it is to make your social media stand out from the rest and gain popularity and following. This is why it is important to use...
The post Six Must-Have Social Media Marketing Tools appeared first on 85ideas.com.
The Internet is awash with a truckload of websites. While most of them hardly manage to take hold of our attention, there are a few which find a way to perch themselves into our bookmarks and are scattered throughout browser’s history. The following list is not about those websites! Instead it brings forth what lies […]