Mqtt protocol in IoT
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MQTT is a messaging protocol that allows devices to publish and subscribe to messages or "topics" through a broker. Publishers connect to the broker to publish content to topics, subscribers connect to the same broker to subscribe to topics they are interested in. The broker ensures published content is distributed to subscribers. Topics use a tree structure separated by forward slashes, and wildcards like # can subscribe to entire branches. An example shows sensors publishing temperature data to topics and a subscriber using wildcards to subscribe to multiple sensor topics.
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Information and network security 42 security of message authentication code
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Message authentication
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3) Topics can be structured in a hierarchy separated by forward slashes, allowing flexible filtering of messages by topic.
03_MQTT_Introduction.pptx
MQTT is a publish-subscribe messaging protocol that is lightweight and designed for constrained devices and unreliable networks. It uses topics to allow publishers and subscribers to communicate asynchronously and decoupled in time and space. MQTT has a hierarchical topic namespace that allows for wildcard subscriptions. Clients connect to a broker that handles routing of messages between publishers and subscribers based on topic filters.
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This document discusses stationary wireless sensor networks and proposes mobile sensor networks as a solution. It describes how stationary wireless sensor networks are vulnerable to node failures that can partition the network, while mobile wireless sensor networks use mobile sinks and data mules to self-configure, self-heal, self-optimize, and self-protect in an infrastructure-less ad hoc network. Mobile wireless sensor networks have applications in underwater monitoring, terrestrial wildlife surveillance using unmanned aerial vehicles, and aerial monitoring.
Wireless sensor network in IOT| object Tracking
The document discusses different formulations for wireless sensor network object tracking including push-based, poll-based, and guided formulations. Push-based formulation has nodes periodically notifying a sink node of a target's position using a cluster structure. Poll-based formulation allows low-cost querying as nodes poll for a target's presence. Guided formulation defines a trajectory for a tracker to follow to intercept a target. Object tracking involves target detection, energy management, position computing, prediction, node cooperation, and recovery.
Wireless Sensor Network Part 3| Behavior Type
The document discusses different types of node behavior in wireless sensor networks. There are normal nodes that work well under ideal conditions. Failed nodes are unable to operate due to power failure or environmental events. Badly failed nodes transmit false routing messages like failed nodes. Selfish nodes are unwilling to cooperate as required by protocols. Malicious nodes disrupt correct routing protocol operation. Dynamic misbehavior can occur when communication range shrinks in adverse environments, causing nodes to sense data but be unable to transmit it temporarily.
Wireless Sensor Network part 2
The document discusses wireless sensor networks and object detection using multiple sensors. It describes single source single object detection, single source multiple object detection, and multiple source single object detection. It also lists some challenges for wireless sensor networks, including providing quality of service with many nodes, guarantees for bandwidth, delay, jitter and packet loss, limited bandwidth, security concerns, and energy efficiency.
Wireless Sensor Network in IoT
Wireless sensor method used to communicate the sensors and provide better reliability to our sensor network
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Mqtt protocol in IoT
- 1. MQTT protocol in IoT Pravesh Kumar pkverma462@gmail.com
- 2. Introduction of MQTT MQTT terms Working of MQTT MQTT architecture
- 3. introduction Message Queue Telemetry Transport (MQTT) protocol Publisher 1 Subscriber n Subscriber 1 publisher Broker
- 4. MQTT terms Publisher:- It connect to server and publish the content Subscriber:- It connect to same message broker and subscribe to content that they are interested in Message Broker:- It assured that the published content to its subscriber Topic:- Content is identify by topic
- 5. Topic in mqtt Topics are ordered into a tree structure The forward slash ( / )is describe as topic path Hash wildcard(#) is used to subscribe entire branch example The publisher send the measured data to “Pravesh/firstIoT/sensors/temperature” topic Subscribing to Pravesh/+/sensors/# will subscribe to all subbranches of the sensors class
- 6. Architecture of MQTT Local Area Network Internet Protocol TCP MQTT over SSL/TLS TCP MQTT Physica l
- 7. Example ROOM 1 ROOM 2 ROOM 3 HOUSE TOPIC HOUSE/ROOM1/temp1 HOUSE/ROOM2/temp2 HOUSE/ROOM3/temp3 HOUSE/+/#
- 8. Thank you