The document discusses the Constrained Application Protocol (CoAP), including:
1) CoAP defines methods like PUT, DELETE, and GET for interacting with resources, and response codes to indicate request status.
2) CoAP messages use a simple binary format with fields for version, message type, token length, and request code or response code.
3) CoAP supports caching of responses and observation of resources for asynchronous updates.
constrained application protocol(CoAP) is a specialized web transfer protocol for use with constrained networks in internet of things and constrained devices such as microcontrollers.
ITVoyagers has created presentation which gives overview on following topics
1. MQTT
2. CoAP
Following are the contents.
MQTT
Components
Diagram
Example
Decoupling in Pub/Sub
CoAP
Description
Layers
Types of message
CoAP Header
It will help students in their last minute preparations for exams.
Zach Shelby, Director of Technology for IoT at ARM and previously the co-founder of Sensinode gives and an in-depth tutrorial of the Constrained Application Protocol (CoAP) for the Internet of Things. Updates to this tutorial made on April 30th, 2014.
JavaZone 2016 : MQTT and CoAP for the Java DeveloperMark West
After HTTP, MQTT and CoAP are perhaps the most commonly used communication protocols for connecting devices to the Internet of Things. But what are MQTT and CoAP, and what benefits do they provide over plain old HTTP?
In this session we’ll start by looking at the limitations to using HTTP in the IoT world. We will then introduce MQTT and CoAP, and explain why these can be compelling replacements for HTTP. By examining the strengths and weaknesses for HTTP, MQTT and CoAP we’ll identify IoT use cases for all three.
M2M Protocols for Constrained Environments in the Context of IoT: A Compariso...Edielson P. Frigieri
The Internet of Things movement opens new possibilities for services and business along with new technological challenges, such as power efficiency, operation in constrained environments, security, and privacy. With the expectation of a high amount of devices connected in this Future Internet, scalability is also assumed to be a challenge. To address these limitations, several protocols are being proposed. In this paper, two of them, MQTT and COAP, are presented and qualitatively compared, summarizing their main features and limitations, highlighting the best scenarios where each approach is more suitable.
The Internet of Things if growing, but how can you build your own connected objects?
Together with MQTT, CoAP is one of the popular IoT protocols. It provides answers to the typical IoT constraints: it is bandwidth efficient and fits in constrained embedded environment while providing friendly and discoverable RESTful API.
This tutorial aims at giving you a hands-on experience with CoAP by showing you the power and simplicity of the Eclipse Californium library for developing real world IoT application.
Agenda:
- Introduction to CoAP
- Live discovery of connected CoAP objects using the Copper plugin for Firefox
- Presentation of more advanced CoAP topics (proxy, resource directory, device management with LWM2M)
- Presentation of Eclipse Californium, a CoAP library for Java
- Exercise: complete the provided Java code to create your own Internet of Things... thing!
Short overview of the XML-RPC protocol for XML-based RPC services.
XML-RPC is a remote procedure call protocol using XML as data format and HTTP as transport protocol.
It is a simple mechanism to call remote procedures on a machine with a different operating system.
XML-RPC is language and platform independent. XML-RPC libraries are available in Java and other languages.
XML-RPC is not more than its name implies and thus is very simple and lean. This means that it lacks most of the features that SOAP/WSDL web services provide.
This documentation details the design of a Distributed Web content caching system in a LAN, using the SDN OpenFlow model. This system was successfully implemented on GENI (Global Environment for Network Innovations) to test the performance improvements.
This distributed web-caching helps reduce access delays of frequently requested web content (web pages, files - pdfs, images,etc.) within the LAN by more than 50% compared to a LAN without this caching system. Further, this model helps in reducing load on the access links as every repeated request need not be fetched from the main server located in some other geographical area.
The distribution of caching servers in the LAN aim at load balancing the requests and also tackle the issue of single point of failure as in a centralized caching system.
High level overview of CoAP or Constrained Application Protocol. CoAP is a HTTP like protocol suitable for constrained environment like IoT. CoAP uses HTTP like request response model, status code etc.
constrained application protocol(CoAP) is a specialized web transfer protocol for use with constrained networks in internet of things and constrained devices such as microcontrollers.
ITVoyagers has created presentation which gives overview on following topics
1. MQTT
2. CoAP
Following are the contents.
MQTT
Components
Diagram
Example
Decoupling in Pub/Sub
CoAP
Description
Layers
Types of message
CoAP Header
It will help students in their last minute preparations for exams.
Zach Shelby, Director of Technology for IoT at ARM and previously the co-founder of Sensinode gives and an in-depth tutrorial of the Constrained Application Protocol (CoAP) for the Internet of Things. Updates to this tutorial made on April 30th, 2014.
JavaZone 2016 : MQTT and CoAP for the Java DeveloperMark West
After HTTP, MQTT and CoAP are perhaps the most commonly used communication protocols for connecting devices to the Internet of Things. But what are MQTT and CoAP, and what benefits do they provide over plain old HTTP?
In this session we’ll start by looking at the limitations to using HTTP in the IoT world. We will then introduce MQTT and CoAP, and explain why these can be compelling replacements for HTTP. By examining the strengths and weaknesses for HTTP, MQTT and CoAP we’ll identify IoT use cases for all three.
M2M Protocols for Constrained Environments in the Context of IoT: A Compariso...Edielson P. Frigieri
The Internet of Things movement opens new possibilities for services and business along with new technological challenges, such as power efficiency, operation in constrained environments, security, and privacy. With the expectation of a high amount of devices connected in this Future Internet, scalability is also assumed to be a challenge. To address these limitations, several protocols are being proposed. In this paper, two of them, MQTT and COAP, are presented and qualitatively compared, summarizing their main features and limitations, highlighting the best scenarios where each approach is more suitable.
The Internet of Things if growing, but how can you build your own connected objects?
Together with MQTT, CoAP is one of the popular IoT protocols. It provides answers to the typical IoT constraints: it is bandwidth efficient and fits in constrained embedded environment while providing friendly and discoverable RESTful API.
This tutorial aims at giving you a hands-on experience with CoAP by showing you the power and simplicity of the Eclipse Californium library for developing real world IoT application.
Agenda:
- Introduction to CoAP
- Live discovery of connected CoAP objects using the Copper plugin for Firefox
- Presentation of more advanced CoAP topics (proxy, resource directory, device management with LWM2M)
- Presentation of Eclipse Californium, a CoAP library for Java
- Exercise: complete the provided Java code to create your own Internet of Things... thing!
Short overview of the XML-RPC protocol for XML-based RPC services.
XML-RPC is a remote procedure call protocol using XML as data format and HTTP as transport protocol.
It is a simple mechanism to call remote procedures on a machine with a different operating system.
XML-RPC is language and platform independent. XML-RPC libraries are available in Java and other languages.
XML-RPC is not more than its name implies and thus is very simple and lean. This means that it lacks most of the features that SOAP/WSDL web services provide.
This documentation details the design of a Distributed Web content caching system in a LAN, using the SDN OpenFlow model. This system was successfully implemented on GENI (Global Environment for Network Innovations) to test the performance improvements.
This distributed web-caching helps reduce access delays of frequently requested web content (web pages, files - pdfs, images,etc.) within the LAN by more than 50% compared to a LAN without this caching system. Further, this model helps in reducing load on the access links as every repeated request need not be fetched from the main server located in some other geographical area.
The distribution of caching servers in the LAN aim at load balancing the requests and also tackle the issue of single point of failure as in a centralized caching system.
High level overview of CoAP or Constrained Application Protocol. CoAP is a HTTP like protocol suitable for constrained environment like IoT. CoAP uses HTTP like request response model, status code etc.
All we know that REST services are almost everywhere now and nearly all new projects use it.
But do we really know how to design proper interfaces? What are pitfalls and how to avoid them?
I did many REST service designs and have a bunch of tips and tricks you definitely would like to use.
It will save you and your team a lot of time in future.
Deep Dive on Accelerating Content, APIs, and Applications with Amazon CloudFr...Amazon Web Services
Learn more about AWS Lambda@Edge (https://aws.amazon.com/lambda/edge/) and Amazon CloudFront (https://aws.amazon.com/cloudfront/).
Attend this session to dive deeper into AWS content delivery service and Amazon CloudFront. Learn how you can use CloudFront to accelerate the delivery of your APIs or applications, including content that cannot be cached, to global clients.
What’s all the buzz about REST APIs, and why should you care? REST APIs are growing quickly, with enterprise and finance the fastest growing categories. REST APIs also enable apps for mobile, wearables, and Internet of Things. If you don’t yet have a content strategy for REST APIs, you may need it soon.
The job market for REST APIs is hot, and you can increase your marketability and value by understanding REST API content. Be prepared by getting a head-start on what you need to know!
This presentation was given at Information Development World on October 1, 2015.
Network Management System and Protocol usibilityHamdamboy (함담보이)
The SNMP Version 1 RFC is:
RFC 1157. Simple Network Management Protocol
SMIv1 RFCs also apply to all SNMPv1 entities. MIB-II RFCs also apply to all SNMPv1 agent entities.
A network management system (NMS) refers to a collection of applications that enable network
components to be monitored and controlled.
network management systems have the same basic architecture, a
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
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The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
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We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
3. 3
The PUT method requests that the resource
identified by the request URI be updated or created
with the enclosed representation.
If a resource exists at the request URI, the enclosed
representation SHOULD be considered a modified version
of that resource, and a 2.04 (Changed) Response Code
SHOULD be returned.
If no resource exists, then the server MAY create
a new resource with that URI, resulting in a 2.01
(Created) Response Code.
If the resource could not be created or
modified, then an appropriate error Response Code
SHOULD be sent.
Method: PUT
URI: coap://scrc.com/
Value: PUT/resource/db/app1/sensor/temp/5afb?it=32.25
CoAP methods (cont…)
PUT
Client Server
CON PUT/resource/db/…/?it=32.25
ACK Changed 2.04
Update
4. 4
The DELETE method requests that the
resource identified by the request URI be deleted.
A 2.02 (Deleted) Response Code SHOULD be
used on success or in case the resource did not exist
before the request.
DELETE is not safe but is idempotent.
Method: DELETE
URI: coap://scrc.com/
Value: DELETE/resource/db/app1/sensor/temp/value/
Client Server
CON DELETE/resource/db/app/sensor/temp/value/
ACK Deleted
De-register
CoAP methods (cont…)
DELETE
6. CoAP messages are encoded in a simple binary format.
The Message Header (4 bytes).
The variable-length token value 0 and 8 bytes long.
6
Ver - Version (1) 2 bit unsigned integer . Implementations of this field to 1 (01 binary).
T – Message Type 2- bit unsigned integer. (Confirmable, Non-Confirmable, Acknowledgement, Reset).
TKL- Token Length 4-bit unsigned integer. Indicates the length of the variable-length Token field (0-8 bytes).
Code – 8-bit unsighted integer. 3 bit class(most signification bits). 5 bits detail (least significant bits).
Request Method (1-10) or Response Code (40-255)
Message ID – 16-bit identifier for matching responses
Token – Optional response matching token
Message Format
Standards Track RFC 7252
June, 2014
7. Caching
7
• CoAP includes a simple caching model
Cache ability determined by response code
An option number mask determines if it is a cache key
• Freshness model
Max-Age option indicates cache lifetime
• Validation model
Validity checked using the Etag Option
• A proxy often supports caching
Usually on behalf of a constrained node,
a sleeping node,
or to reduce network load
The Max-Age Option indicates the maximum time a response may be cached before it MUST be considered not
fresh.
The option value is an integer number of seconds between 0 and 2^32-1 inclusive (about 136.1 years).
A default value of 60 seconds is assumed in the absence of the option in a response.
This option is "elective". It MUST NOT occur more than once.
9. Observation
9
COAP Observation
PROBLEM:
REST paradigm is often “PULL” type, that is,
data is obtained by issuing an explicit request
Information/data in WSN is often periodic/
triggered (e.g., get me a temperature sample every
2 seconds or get me a warning if temperature goes
below 5°C)
SOLUTION:
use Observation on COAP resources
11. Getting Started with CoAP
11
• There are many open source implementations available
Java CoAP Library Californium
C CoAP Library Erbium
libCoAP C Library
jCoAP Java Library
OpenCoAP C Library
TinyOS and Contiki include CoAP support
• CoAP is already part of many commercial products/systems
Sensinode NanoService
RTX 4100 WiFi Module
• Firefox has a CoAP plugin called Copper
• Wireshark has CoAP dissector support
• Implement CoAP yourself, it is not that hard!
12. 12
Getting Started with CoAP (cont…)
https://en.wikipedia.org/wiki/Constrained_Application_Protocol
15. Discovery
15
• Service Discovery
What services are available in the first place?
Goal of finding the IP address, port and protocol
Usually performed by e.g. DNS-SD when DNS is available
• Resource Discovery
What are the Web resources I am interested in?
Goal of finding URIs
Performed using Web Linking or some REST interface
CoRE Link Format is designed to enable resource discovery
16. Discovery (cont…)
16
The mechanism used by a node to search for resources among other nodes of the network.
A user at a node provides a search query containing a set of keywords corresponding to the resource being
searched for.
A resource discovery protocol is then used to forward the search query to other nodes and search for
the resource on those nodes.
When a resource is located at a node, a success message is sent to the node that originated the search query
17. Add CoAP to your application
17
Initial demonstration step of CoAP
18. 18
Initial demonstration step of CoAP (cont…)
• Installing Mozilla + Copper (Cu)
• Java (JRE 7~8)
• Eclipse (Mars 4.5)
• Eclipse/ Help/ Reactive Block
• Import packege CoAP and other