MQTT: il protocollo che rende possibile l'Internet of Things (Ott. 2015)Omnys
L’Internet Of Things (IoT) rappresenta l'evoluzione tecnologica che oggi consente l’interconnessione sempre più pervasiva tra dispositivi e oggetti di qualsiasi tipologia.
Il protocollo MQTT è alla base della comunicazione tra i dispositivi e la Rete.
La presentazione si focalizza sui seguenti aspetti:
- Cos’è il procollo MQTT e perché è nato?
- Quali sono i vantaggi in termini economici ed infrastrutturali derivanti dall’adozione dell’MQTT nell’Internet of Things?
- Perchè l’adozione dell’MQTT può rappresentare, per l’Internet of Things, un balzo in avanti rispetto all’utilizzo di altri protocolli di comunicazione come l’HTTP?
- Quali sono e come possono essere superate in maniera soddisfacente le problematiche di sicurezza dei dispositivi connessi a Internet?
- In termini prestazionali e comparativi, che livelli di carico può supportare un’infrastruttura basata su MQTT?
Ambiti di applicazione e di interesse:
- Produttori di dispositivi Hardware.
- Produttori di sistemi di automazione a microprocessore.
- Produttori di dispositivi consumer-oriented pensati per l'interconnessione.
- Aziende che operano nei seguenti settori: Domotica, Automotive, Infomobilità, Telemetria, Telematica, Biomedicale, Monitoraggio industriale, Sistemi embedded.
This document discusses fiber to the x (FTTx) network architectures, including fiber to the home (FTTH), fiber to the premises (FTTP), fiber to the curb (FTTC), and fiber to the node (FTTN). It provides an overview of the current status and adoption of FTTx networks in the United States, drivers for telecommunications companies and homeowners to implement FTTx, and common FTTx network designs like home run, active star, and passive optical networks (PON). The document also outlines the components involved in FTTx networks and benefits of FTTx for contractors.
A firewall remains the better choice for organizations willing to cut costs on their security mechanism, because it allows them to implement a parallel software on all hosts instead of implementing one individually.
Roaming allows mobile subscribers to access voice and data services outside their home network coverage area by using a visited network. It requires roaming agreements between operators. There are several entities involved including home networks, visited networks, and clearing houses. Roaming can be national, international, or between different standards. Inbound roaming refers to customers of other operators using a home operator's network, while outbound refers to home customers using other networks. Roaming scenarios describe how calls are routed for subscribers roaming within and between networks. GSM technology benefits roaming by providing worldwide access across standards through a single number and device.
Propelling 5G forward: a closer look at 3GPP Release-16Qualcomm Research
This presentation summarizes the 3GPP 5G NR Release 16 projects, including eMBB enhancements, unlicensed, sidelink, IAB, TSN, eURLLC, private networks, C-V2X, and more...
The document discusses ad hoc networks and wireless sensor networks. It defines an ad hoc network as a temporary network composed of mobile nodes without preexisting infrastructure that is self-organizing. Wireless sensor networks are introduced as a collection of sensor nodes densely deployed to monitor conditions and cooperatively pass data back to central nodes. The document outlines key characteristics of both networks including their temporary and adaptive nature, multi-hop routing, and challenges of mobility, power constraints, and dynamic topology changes.
Traffic Engineering Using Segment Routing Cisco Canada
1) The document discusses using segment routing for traffic engineering. It provides an overview of segment routing technology, use cases, control and data plane operations, and how segment routing can be used for traffic engineering.
2) Key aspects covered include how segment routing works by encoding a path as an ordered list of segments, different types of segments (IGP prefixes, adjacencies, BGP), and how this allows for application-engineered end-to-end paths.
3) Traffic engineering with segment routing provides explicit routing, supports constraint-based routing without needing RSVP-TE, and uses existing IGP extensions to advertise link attributes.
MQTT: il protocollo che rende possibile l'Internet of Things (Ott. 2015)Omnys
L’Internet Of Things (IoT) rappresenta l'evoluzione tecnologica che oggi consente l’interconnessione sempre più pervasiva tra dispositivi e oggetti di qualsiasi tipologia.
Il protocollo MQTT è alla base della comunicazione tra i dispositivi e la Rete.
La presentazione si focalizza sui seguenti aspetti:
- Cos’è il procollo MQTT e perché è nato?
- Quali sono i vantaggi in termini economici ed infrastrutturali derivanti dall’adozione dell’MQTT nell’Internet of Things?
- Perchè l’adozione dell’MQTT può rappresentare, per l’Internet of Things, un balzo in avanti rispetto all’utilizzo di altri protocolli di comunicazione come l’HTTP?
- Quali sono e come possono essere superate in maniera soddisfacente le problematiche di sicurezza dei dispositivi connessi a Internet?
- In termini prestazionali e comparativi, che livelli di carico può supportare un’infrastruttura basata su MQTT?
Ambiti di applicazione e di interesse:
- Produttori di dispositivi Hardware.
- Produttori di sistemi di automazione a microprocessore.
- Produttori di dispositivi consumer-oriented pensati per l'interconnessione.
- Aziende che operano nei seguenti settori: Domotica, Automotive, Infomobilità, Telemetria, Telematica, Biomedicale, Monitoraggio industriale, Sistemi embedded.
This document discusses fiber to the x (FTTx) network architectures, including fiber to the home (FTTH), fiber to the premises (FTTP), fiber to the curb (FTTC), and fiber to the node (FTTN). It provides an overview of the current status and adoption of FTTx networks in the United States, drivers for telecommunications companies and homeowners to implement FTTx, and common FTTx network designs like home run, active star, and passive optical networks (PON). The document also outlines the components involved in FTTx networks and benefits of FTTx for contractors.
A firewall remains the better choice for organizations willing to cut costs on their security mechanism, because it allows them to implement a parallel software on all hosts instead of implementing one individually.
Roaming allows mobile subscribers to access voice and data services outside their home network coverage area by using a visited network. It requires roaming agreements between operators. There are several entities involved including home networks, visited networks, and clearing houses. Roaming can be national, international, or between different standards. Inbound roaming refers to customers of other operators using a home operator's network, while outbound refers to home customers using other networks. Roaming scenarios describe how calls are routed for subscribers roaming within and between networks. GSM technology benefits roaming by providing worldwide access across standards through a single number and device.
Propelling 5G forward: a closer look at 3GPP Release-16Qualcomm Research
This presentation summarizes the 3GPP 5G NR Release 16 projects, including eMBB enhancements, unlicensed, sidelink, IAB, TSN, eURLLC, private networks, C-V2X, and more...
The document discusses ad hoc networks and wireless sensor networks. It defines an ad hoc network as a temporary network composed of mobile nodes without preexisting infrastructure that is self-organizing. Wireless sensor networks are introduced as a collection of sensor nodes densely deployed to monitor conditions and cooperatively pass data back to central nodes. The document outlines key characteristics of both networks including their temporary and adaptive nature, multi-hop routing, and challenges of mobility, power constraints, and dynamic topology changes.
Traffic Engineering Using Segment Routing Cisco Canada
1) The document discusses using segment routing for traffic engineering. It provides an overview of segment routing technology, use cases, control and data plane operations, and how segment routing can be used for traffic engineering.
2) Key aspects covered include how segment routing works by encoding a path as an ordered list of segments, different types of segments (IGP prefixes, adjacencies, BGP), and how this allows for application-engineered end-to-end paths.
3) Traffic engineering with segment routing provides explicit routing, supports constraint-based routing without needing RSVP-TE, and uses existing IGP extensions to advertise link attributes.
BGP Flow Specification allows network operators to define and distribute traffic filtering rules via BGP. This helps operators quickly mitigate DDoS attacks by filtering traffic at an upstream level rather than just blackholing entire prefixes. It separates filtering information from routing data using new BGP address families. Validating flow specifications against the best unicast route helps prevent spoofing. Common filtering actions include traffic policing, sampling, and redirection. While some ISPs have begun implementations, widespread adoption is still needed to realize the benefits of centralized DDoS defense using BGP Flow Specification.
The document discusses various topics related to mobile network layer including Mobile IP, DHCP, Ad Hoc networks, and routing protocols.
Mobile IP allows devices to change locations while maintaining network connectivity using care-of addresses, home agents, and tunneling. DHCP dynamically assigns IP addresses in mobile networks. Ad Hoc networks are temporary networks formed without infrastructure between devices using multi-hop routing. Routing protocols for Ad Hoc networks can be proactive, maintaining routes continuously, or reactive, determining routes on demand to reduce overhead.
Main purpose of this document is to discuss LTE basic call flows.
It also introduces LTE network architecture, Nodes, their functionality as well as interfaces that
connect these network nodes.
A brief description of UE states is also given.
PLNOG 13: Krzysztof Konkowski: Cisco Access Architectures: GPON, Ethernet, Ac...PROIDEA
Krzysztof Konkowski – Consulting Systems Engineer working in IP NGN Team, Cisco. Mainly focused on carrier class solutions for broad range of customer segments: service provider, public sector, enterprise. Main technical expertise: MPLS/IP, Carrier Ethernet, BNG, Multicast. Holder of many certificates – amongst others CCIE RS i CCIE SP #20050.
Topic of Presentation: Cisco Access Architectures: GPON, Ethernet, Access for business
Language: Polish
Abstract: TBD
This document provides an overview of LTE architecture and interfaces. It begins with a brief history of 3GPP and IEEE standards evolutions leading to LTE. It then discusses the key capabilities and performance targets of LTE such as higher data rates, lower latency, and improved spectrum efficiency. The document outlines the LTE system architecture including the Evolved UTRAN and Evolved Packet Core. It describes the network interfaces between these components and other 3GPP networks for interworking and roaming. In summary, the document covers the evolution and standardization history driving LTE, its important technical capabilities, and high-level network architecture.
The document discusses international mobile roaming, including:
1. The different types of roaming agreements and their lifecycles, from establishing strategies and negotiating terms to testing, implementing, and ongoing monitoring.
2. Key roaming management tasks like internal processes and interfaces with external partners.
3. Common bottlenecks that can occur during negotiation, testing, go-live, and ongoing operations, and ways to avoid them like clear processes, priorities, resources, and potentially outsourcing some functions.
Close coordination is needed across the departments involved to successfully establish and maintain roaming partnerships.
this slide contains fundamental concept about VPLS protocol, according to the latest version of Cisco books and i taught it at IRAN TIC company.in the next slide, i upload attractive advanced feature about VPLS.
(Some of the pictures in this slide are borrowed from the wonderful site of my good friend Gokhan Kosem)
(www.ipcisco.com)
in these slides you will learn what is roaming and how it is work in simple way also with some signaling to show how the operators work together and how call & SMS routed , billing ,agreement ,
for any information plz contact me (rawand.ali@hotmail.com)
Tel: +9647701105935
Meraki is a leader in cloud networking with over 18,000 customer networks in 145 countries. It focuses on technology innovation and was founded in 2006 at MIT. Meraki's cloud networking architecture provides centralized management of wireless, LAN, and security devices from any web browser. This allows for intuitive management, complete visibility, and robust security and reliability. Meraki equipment and cloud services can provide significant cost savings over traditional networking solutions.
Préparez l'examen (200-125) afin d'obtenir la certification Cisco CCNA V3.
A l'issue de cette formation vous allez :
- Aborder les divers thèmes qui font sujet de l’examen CCNA routage et commutation à travers des démonstrations et des questions réponses, nous essayons d’exposer le maximum des cas pratiques qui sont posés souvent comme questions au cours de l’examen;
- Découvrir ce qui est apporté de neuf par cette nouvelle version CCNA v3;
- Avoir une vision claire sur le passage de certification dans le domaine IT en général et le passage de la certification CCNA routage et commutation en particulier;
- Avoir des réponses en détails et des conseils sur la procédure de passage de certification CCNA routage et commutation.
Suivez la formation complète par ici :
https://www.smartnskilled.com/tutoriel/formation-en-ligne-cisco-ccna-routing-et-switching-examen-200-125
This document provides an overview of IP RAN network design for 2G and 3G networks. It discusses key aspects of IP RAN including transport connectivity, network synchronization, quality of service, and security. The document also presents case studies of 2G and 3G network topologies designed using IP RAN principles.
This document provides an overview of Cisco's campus routing foundation and best practices. It discusses hierarchical network design principles and reviews multilayer campus network designs. It also covers the benefits of leveraging equal cost multiple paths for fast convergence, building triangular network topologies, and optimizing CEF load balancing. The presentation aims to provide guidance for building a routed access campus design.
NetFlow is Cisco's proprietary network protocol for flow analysis that collects and aggregates network traffic information. sFlow is a general purpose sampling technology introduced in 1991 by HP to provide continuous statistics on network traffic from L2 to L7. IPFIX is the standardized version of NetFlow v9 for exporting flow information from devices in a flexible way. NetFlow supports Cisco devices while sFlow supports a wide range of switches and routers. Both have advantages over each other for scalability and information collection.
5G networks use a split architecture where the base station functions are split into centralized and distributed units. The central unit controls the radio resources and handles signaling, while distributed units perform scheduling and handle lower layer protocols. This allows flexible deployment and reduced latency. Control and user plane functions can also be separated into different central units for further optimization. The split architecture evolves from 4G to allow decreased fronthaul needs while meeting latency demands.
Internet è cresciuto in maniera esponenziale passando dalle poche migliaia di collegamenti a qualche miliardo di persone connesse in tutto il mondo. Smart Business, Smart Home, Wearable, Smart City. Tutto si fa più veloce e “smart”. Quali sono gli effetti principali? Quali i vantaggi? Quali le sfide?
Per maggiori approfondimenti: http://issuu.com/sarascotti/docs/iot
Internet of Things: mercato, tecnologie, applicazioni e competenzeArmando Martin
Oggi l’Internet delle cose è un paradigma tecnologico in cui la comunicazione è estesa all’interazione tra uomini, dispositivi e sottosistemi. L’Internet delle cose è un insieme
di tecnologie digitali che vanno dai tag RFId alle reti di sensori, dalle superfici touch alla realtà aumentata, dai sistemi logistici integrati alle infrastrutture in chiave di sostenibilità
BGP Flow Specification allows network operators to define and distribute traffic filtering rules via BGP. This helps operators quickly mitigate DDoS attacks by filtering traffic at an upstream level rather than just blackholing entire prefixes. It separates filtering information from routing data using new BGP address families. Validating flow specifications against the best unicast route helps prevent spoofing. Common filtering actions include traffic policing, sampling, and redirection. While some ISPs have begun implementations, widespread adoption is still needed to realize the benefits of centralized DDoS defense using BGP Flow Specification.
The document discusses various topics related to mobile network layer including Mobile IP, DHCP, Ad Hoc networks, and routing protocols.
Mobile IP allows devices to change locations while maintaining network connectivity using care-of addresses, home agents, and tunneling. DHCP dynamically assigns IP addresses in mobile networks. Ad Hoc networks are temporary networks formed without infrastructure between devices using multi-hop routing. Routing protocols for Ad Hoc networks can be proactive, maintaining routes continuously, or reactive, determining routes on demand to reduce overhead.
Main purpose of this document is to discuss LTE basic call flows.
It also introduces LTE network architecture, Nodes, their functionality as well as interfaces that
connect these network nodes.
A brief description of UE states is also given.
PLNOG 13: Krzysztof Konkowski: Cisco Access Architectures: GPON, Ethernet, Ac...PROIDEA
Krzysztof Konkowski – Consulting Systems Engineer working in IP NGN Team, Cisco. Mainly focused on carrier class solutions for broad range of customer segments: service provider, public sector, enterprise. Main technical expertise: MPLS/IP, Carrier Ethernet, BNG, Multicast. Holder of many certificates – amongst others CCIE RS i CCIE SP #20050.
Topic of Presentation: Cisco Access Architectures: GPON, Ethernet, Access for business
Language: Polish
Abstract: TBD
This document provides an overview of LTE architecture and interfaces. It begins with a brief history of 3GPP and IEEE standards evolutions leading to LTE. It then discusses the key capabilities and performance targets of LTE such as higher data rates, lower latency, and improved spectrum efficiency. The document outlines the LTE system architecture including the Evolved UTRAN and Evolved Packet Core. It describes the network interfaces between these components and other 3GPP networks for interworking and roaming. In summary, the document covers the evolution and standardization history driving LTE, its important technical capabilities, and high-level network architecture.
The document discusses international mobile roaming, including:
1. The different types of roaming agreements and their lifecycles, from establishing strategies and negotiating terms to testing, implementing, and ongoing monitoring.
2. Key roaming management tasks like internal processes and interfaces with external partners.
3. Common bottlenecks that can occur during negotiation, testing, go-live, and ongoing operations, and ways to avoid them like clear processes, priorities, resources, and potentially outsourcing some functions.
Close coordination is needed across the departments involved to successfully establish and maintain roaming partnerships.
this slide contains fundamental concept about VPLS protocol, according to the latest version of Cisco books and i taught it at IRAN TIC company.in the next slide, i upload attractive advanced feature about VPLS.
(Some of the pictures in this slide are borrowed from the wonderful site of my good friend Gokhan Kosem)
(www.ipcisco.com)
in these slides you will learn what is roaming and how it is work in simple way also with some signaling to show how the operators work together and how call & SMS routed , billing ,agreement ,
for any information plz contact me (rawand.ali@hotmail.com)
Tel: +9647701105935
Meraki is a leader in cloud networking with over 18,000 customer networks in 145 countries. It focuses on technology innovation and was founded in 2006 at MIT. Meraki's cloud networking architecture provides centralized management of wireless, LAN, and security devices from any web browser. This allows for intuitive management, complete visibility, and robust security and reliability. Meraki equipment and cloud services can provide significant cost savings over traditional networking solutions.
Préparez l'examen (200-125) afin d'obtenir la certification Cisco CCNA V3.
A l'issue de cette formation vous allez :
- Aborder les divers thèmes qui font sujet de l’examen CCNA routage et commutation à travers des démonstrations et des questions réponses, nous essayons d’exposer le maximum des cas pratiques qui sont posés souvent comme questions au cours de l’examen;
- Découvrir ce qui est apporté de neuf par cette nouvelle version CCNA v3;
- Avoir une vision claire sur le passage de certification dans le domaine IT en général et le passage de la certification CCNA routage et commutation en particulier;
- Avoir des réponses en détails et des conseils sur la procédure de passage de certification CCNA routage et commutation.
Suivez la formation complète par ici :
https://www.smartnskilled.com/tutoriel/formation-en-ligne-cisco-ccna-routing-et-switching-examen-200-125
This document provides an overview of IP RAN network design for 2G and 3G networks. It discusses key aspects of IP RAN including transport connectivity, network synchronization, quality of service, and security. The document also presents case studies of 2G and 3G network topologies designed using IP RAN principles.
This document provides an overview of Cisco's campus routing foundation and best practices. It discusses hierarchical network design principles and reviews multilayer campus network designs. It also covers the benefits of leveraging equal cost multiple paths for fast convergence, building triangular network topologies, and optimizing CEF load balancing. The presentation aims to provide guidance for building a routed access campus design.
NetFlow is Cisco's proprietary network protocol for flow analysis that collects and aggregates network traffic information. sFlow is a general purpose sampling technology introduced in 1991 by HP to provide continuous statistics on network traffic from L2 to L7. IPFIX is the standardized version of NetFlow v9 for exporting flow information from devices in a flexible way. NetFlow supports Cisco devices while sFlow supports a wide range of switches and routers. Both have advantages over each other for scalability and information collection.
5G networks use a split architecture where the base station functions are split into centralized and distributed units. The central unit controls the radio resources and handles signaling, while distributed units perform scheduling and handle lower layer protocols. This allows flexible deployment and reduced latency. Control and user plane functions can also be separated into different central units for further optimization. The split architecture evolves from 4G to allow decreased fronthaul needs while meeting latency demands.
Internet è cresciuto in maniera esponenziale passando dalle poche migliaia di collegamenti a qualche miliardo di persone connesse in tutto il mondo. Smart Business, Smart Home, Wearable, Smart City. Tutto si fa più veloce e “smart”. Quali sono gli effetti principali? Quali i vantaggi? Quali le sfide?
Per maggiori approfondimenti: http://issuu.com/sarascotti/docs/iot
Internet of Things: mercato, tecnologie, applicazioni e competenzeArmando Martin
Oggi l’Internet delle cose è un paradigma tecnologico in cui la comunicazione è estesa all’interazione tra uomini, dispositivi e sottosistemi. L’Internet delle cose è un insieme
di tecnologie digitali che vanno dai tag RFId alle reti di sensori, dalle superfici touch alla realtà aumentata, dai sistemi logistici integrati alle infrastrutture in chiave di sostenibilità
Google continues to dominate search and increase its share. According to data, Google's core search increased 5.9% from October 2016 to May 2017 while its closest competitors like Yahoo and Bing declined. Google distributes search traffic relatively evenly across sites while Facebook and YouTube tend to concentrate traffic on very large sites. Reddit and YouTube send the majority of their referral traffic to just a handful of top sites.
What is Artificial Intelligence | Artificial Intelligence Tutorial For Beginn...Edureka!
** Machine Learning Engineer Masters Program: https://www.edureka.co/masters-program/machine-learning-engineer-training **
This tutorial on Artificial Intelligence gives you a brief introduction to AI discussing how it can be a threat as well as useful. This tutorial covers the following topics:
1. AI as a threat
2. What is AI?
3. History of AI
4. Machine Learning & Deep Learning examples
5. Dependency on AI
6.Applications of AI
7. AI Course at Edureka - https://goo.gl/VWNeAu
For more information, please write back to us at sales@edureka.co
Call us at IN: 9606058406 / US: 18338555775
Facebook: https://www.facebook.com/edurekaIN/
Twitter: https://twitter.com/edurekain
LinkedIn: https://www.linkedin.com/company/edureka
Top 5 Deep Learning and AI Stories - October 6, 2017NVIDIA
Read this week's top 5 news updates in deep learning and AI: Gartner predicts top 10 strategic technology trends for 2018; Oracle adds GPU Accelerated Computing to Oracle Cloud Infrastructure; chemistry and physics Nobel Prizes are awarded to teams supported by GPUs; MIT uses deep learning to help guide decisions in ICU; and portfolio management firms are using AI to seek alpha.
This document provides a summary of fundraising rounds for AI and data startups in Europe in 2016. Some key findings include:
- Over 270 startups raised $774 million in 2016, up from $583 million in 2015.
- The average funding round was $3.7 million.
- France and the UK led fundraising totals, with 108 startups in the UK raising $188 million and 37 startups in France raising $118 million.
- Early stage investments boomed, with $215 million invested in 170 early stage startups.
- In 2016, focus shifted from marketing applications to technologies using natural language processing, speech recognition and other AI techniques, as well as applications in healthcare, agriculture and other industries
AI and Machine Learning Demystified by Carol Smith at Midwest UX 2017Carol Smith
What is machine learning? Is UX relevant in the age of artificial intelligence (AI)? How can I take advantage of cognitive computing? Get answers to these questions and learn about the implications for your work in this session. Carol will help you understand at a basic level how these systems are built and what is required to get insights from them. Carol will present examples of how machine learning is already being used and explore the ethical challenges inherent in creating AI. You will walk away with an awareness of the weaknesses of AI and the knowledge of how these systems work.
Crouzet Automation - em4 Ethernet opuscolo, versione italiana Crouzet
Fra i pionieri nella semplificazione della programmazione, Crouzet Automation dispone di un team di tecnici esperti e offre soluzioni per l'automazione facili da utilizzare, flessibili e ideali per esigenze specifiche e complesse..
www.crouzet-automation.com
LinkedIn: https://www.linkedin.com/company/crouzet-automation
Crouzet Automation è un marchio di InnoVista Sensors™.
InnoVista Sensors™: il vostro partner di fiducia per affrontare le sfide presenti e future del settore industriale.
InnoVista Sensors™ è un'azienda specializzata a livello mondiale in sensori, apparecchi di controllo e attuatori per sistemi d’automazione.
Attraverso i suoi brands Crouzet Aerospace, Crouzet Automation, Crouzet Control, Crouzet Motors, Crouzet Switches e Systron Donner Inertial, InnoVista Sensors™ offre un'ampia gamma di componenti affidabili, efficienti e customizzati, destinati ai mercati: Aeronautica & Difesa, Trasporti e Industria.
Forte dell’esperienza dei suoi team e impegnata in una politica di innovazione sostenuta , InnoVista Sensors™ propone soluzioni di eccellenza ai propri clienti in tutto il mondo.
www.innovistasensors.com
Supported by an experienced technical team, Crouzet Automation is a pioneer in the simplification of programming. The brand offers the easiest-to-use and most adaptable alternative automation solution for specialized and demanding needs.
http://www.crouzet-automation.com
Follow us on LinkedIn: https://www.linkedin.com/company/crouzet-automation
Crouzet Automation is a brand of InnoVista Sensors™.
InnoVista Sensors™ : your trusted partner of choice to face industrial challenges of today and tomorrow.
InnoVista Sensors™ is a worldwide industrial specialist of sensors, controllers and actuators for automated systems.
Through its brands, Crouzet Aerospace, Crouzet Automation, Crouzet Control, Crouzet Motors, Crouzet Switches and Systron Donner Inertial, InnoVista Sensors™ offers a wide range of reliable, efficient and customizable components dedicated to the Aerospace & Defence, Transportation and Industrial market and segments.
Thanks to the recognized expertise of its teams and a strong innovation policy, InnoVista Sensors™ brings performance enhancing solutions to its customers worldwide.
www.innovistasensors.comCrouzet Automation is a brand of InnoVista Sensors™.
Iot prototype ( Arduino+electret microphone+esp-01) which analyses and distingueshes sounds. Useful to study and monitor data about noise pollution and road traffic.
Il web service e i sistemi embedded - Tesi - cap2pma77
Nel capitolo secondo capitolo della tesi " SVILUPPO E IMPLEMENTAZIONE SU MICROCONTROLLORE DI UN’APPLICAZIONE WEB SERVER PER IL CONTROLLO DI UN SISTEMA EMBEDDED"sono presentati diversi prodotti commerciali impieganti Web Service , in modo particolare dispositivi di tipo embedded. Viene discusso, inoltre, su come le tecnologie Web entrino nel mondo industriale e della domotica e si pone l’attenzione sui fattori che impediscono il pieno sviluppo in questi ambiti. Infine vengono proposti diversi articoli che affrontano tematiche simili a quelle della tesi.
SENECA Connectivity Day alla fiera SAVE 2015SENECA
Nuovo standard SENECA per la comunicazione industriale. Alta tecnologia a basso prezzo. Gateway industriali, router VPN, serial device server. Nuova gamma 2015. Soluzioni per il telecontrollo e la teleassistenza
Il lavoro descrive la progettazione, l'implementazione e il test sperimentale di un meccanismo, integrato nel kernel Linux 4.0, dedicato al riconoscimento delle perdite dei frame Wi-Fi
Presentazione Scenario Normative Internazionali tratta dal seminario HELPING YOU BUILD A BETTER NETWORKS conclusosi con l\'ultima tappa di Lisbona in Portogallo
Presento la mia Tesi di Laurea che ha come titolo «Il protocollo MQTT e il paradigma publiish-subscribe. Applicazioni nell’Internet of Things».
Il paradigma publish-subscribe è un design pattern per la messaggistica, per lo scambio di contenuti ed informazioni in una rete. I nodi della rete possono essere publisher, quando creano e inviano i contenuti, e/o subscriber, quando si iscrivono ad un certo tipo di contenuti. Il paradigma prevede che quando un publisher pubblica un messaggio tutti i subscriber iscritti a quel tipo di messaggio lo ricevano.
Un esempio ad alto livello del paradigma publish-subscribe è il social network Twitter. Un utente diventa subscriber quando segue un altro utente e publisher quando pubblica un tweet. È compito di Twitter ogni volta che viene pubblicato un tweet inoltrarlo e farlo apparire nelle timeline di tutti gli utenti che seguono l’autore del tweet.
Il paradigma ha quindi bisogno di un tramite per permettere la trasmissione in multicast dal publisher ai subscriber. L’intermediario viene chiamato broker (o dispatcher) e ha il ruolo di registrare le sottoscrizioni dei vari client e di inoltrare ogni messaggio pubblicato da ogni client verso tutti i client iscritti a quel tipo di messaggi.
Il protocollo MQTT è un protocollo del livello Applicativo dello standard ISO/OSI. Solitamente usato in cima allo stack TCP/IP ma implementabile su qualsiasi protocollo di rete e trasporto che forniscano una connessione bi-direzionale, ordinata e senza perdite di dati.
Gli autori del protocollo hanno definito le caratteristiche in un manifesto ufficioso. Il protocollo deve essere implementabile anche in dispositivi con scarse risorse computazionali e che utilizzino canali di comunicazione instabili. QoS: garanzia di effettivo invio/ricezione dei messaggi. Data-agnostico: il payload può essere strutturato in qualsiasi modo a seconda dell’use case (file binari, testo, JSON, XML). Stateful: se il client lo richiede il broker salva il suo stato tra le varie sessioni (sottoscrizioni, messaggi con richiesta di garanzia di ricezione).
Il protocollo è stato creato da Andy Stanford-Clark e Arlen Nipper per IBM nel 1999. La sua prima applicazione è stata il controllo di oleodotti e gasdotti tramite una rete di sensori connessi via satellite.
Nel 2010 la versione 3.1 delle specifiche del protocollo è stata rilasciata sotto licenza royalty-free, rendendo quindi liberamente implementabile il protocollo.
Dal rilascio con licenza royalty-free, nel 2010, la popolarità del protocollo è in continua crescita (come si può vedere dal grafico fornito da Google Trends per la chiave di ricerca «MQTT») anche grazie ai progetti Open Source dell’Eclipse Foundation PAHO e mosquitto. Paho è un insieme di librerie per l’implementazione di client MQTT in vari linguaggi di programmazione come C, Java, Python, C++, Go, .NET ed altri. Mosquitto è un broker open-source scritto in C disponibile per i maggiori sistemi operativi ma anche per dispositivi come il Raspberry Pi.
Vediamo adesso come il protocollo può essere utilizzato nell’ambito dell’internet of Things per la realizzazione di progetti per l’automazione e la domotica utilizzando componenti a basso costo e librerie software open-source.
Il termine Internet of Things è stato coniato da Kevin Ashton lo stesso anno in cui è nato MQTT, nel 1999. Molti analisti definiscono questi anni come l’era dell’Internet of Things (smartphone, macchine, frigoriferi, e applicazioni come le smart city, l’e-health, ecc…). I dispositivi connessi ad internet hanno superato in numero la popolazione mondiale ed è previsto che nel 2020 ci saranno più di 20 miliardi di dispositivi connessi alla rete globale.
Per i miei progetti nell’«Internet delle cose» la cosa che ho scelto per la connettività è questo SoC (system-on-a-chip), l’ESP8266. È dotato di un processore che lavora a 80Mhz e di una manciata di kilobyte di memoria di sistema e da 1 a 16MB di memoria flash per la memorizzazione e l’esecuzione di semplici programmi. Inoltre implementa un modulo per la connessione alle reti Wi-Fi e alcuni pin GPIO (general purpose input/output) che permette di collegargli diversi sensori e attuatori.
Nella tesi ho parlato di due progetti IoT che utilizzano l’ESP8266, un sistema per la termoregolazione nelle case e un’interruttore programmabile e comandabile da remoto.
Il sistema di termoregolazione permette tramite una rete di sensori di temperatura e di attuatori che agiscono sulle valvole dei caloriferi (una coppia per ogni stanza) di gestire il riscaldamento di una abitazione.
Il sensore di temperatura (in questo caso il TMP36, acquistabile per un paio di euro) comunica alla rete ad intervalli regolari la temperatura percepita in una stanza sul topic temperatura/nome_stanza/temperatura_percepita tramite MQTT.Queste sono due righe del codice del programma che viene eseguito dall’ESP8266.
L’attuatore consiste in delle valvole che vengono applicate sui caloriferi e che si aprono quando vengono alimentate a 220V e si chiudono quando l’alimentazione viene interrotta. Tramite un relè è possibile programmarne il comportamento con un segnale a basso voltaggio come quello fornito dai pin GPIO dell’ESP8266.
L’ESP8266 si iscrive ai topic per conoscere la temperatura attuale dell’ambiente e quella scelta dall’utente e se quest’ultima è maggiore della temperatura percepita apre la valvola attivando il relè.
I sensori e gli attuatori si connettono al broker (rappresentato da un’istanza di mosquitto eseguita in locale, ad esempio su un Raspberry Pi) utilizzando un porting open source della libreria PAHO per il linguaggio C modificata per essere eseguita sull’ESP8266. Tramite la funzione di bridging offerta da mosquitto è possibile collegare il broker locale ad un broker remoto per permettere l’interazione con i dispositivi dentro casa anche senza essere connessi alla rete locale. Mentre in locale è possibile utilizzare MQTT su TCP senza criptazione della comunicazione, è possibile impostare per il bridge una connessione sicura, criptata end-to-end, utilizzando il protocollo TLS/SSL.
Le foto mostrano altre esempi di implementazione del protocollo MQTT per usi nell’IoT per connettere alla rete un sensore di pioggia, un accellerometro e un interruttore.