Immense amounts of water are wasted daily, and it is as important as ever to optimize our water consumption, especially considering that today around 850 million people lack access to clean water. With the rise of the Internet of Things, creating a monitoring system for this purpose becomes easier, but there arises a problem of interfacing water meters to IoT capable devices.In this thesis a framework for IoT smart water monitoring is presented. Both short range and long range communication techniques are shown, compared and discussed. Similarly, different smart water meters and their characteristics are compared.The main goal of this thesis was to implement an interface between a sensor node and the water meter, ensuring the transmission of data in an easy way. To achieve this goal, a M-Bus library integrated into Contiki-OS is presented, thereby showing that it is possible to interface a water meter with a sensor node. The implemented library is capable of changing some of the configurations of the water meter, receiving data from the water meter, as well as forwarding the data via MQTT or CoAP protocols for further processing on the server side. / Stora mängder vatten slösas dagligen och det är viktigt nu att vi optimerar vattenförbrukningen, särskilt med tanke på att cirka 850 miljoner människor idag saknar tillgång till rent vatten. Med uppkomst av Sakernas Internet blir det lättare att skapa ett övervakningssystem för detta ändamål, men det finns fortfarande problem med att ansluta vattenmätare till IoT-kompatibla enheter.I detta arbete presenteras ett ramverk för smart vattenmätning med IoT. Både kortdistansoch långdistanskommunikationsteknik presenteras, jämförs och diskuteras. På samma sätt jämförs olika smarta vattenmätare och deras egenskaper.Huvudsyftet med denna arbetet var att implementera ett gränssnitt mellan en sensornod och vattenmätare, vilket säkerställer överföring av data på ett enkelt sätt. För att uppnå detta mål presenteras ett M-Bus-bibliotek integrerat i ContikiOS, vilket visar att det är möjligt att koppla en vattenmätare till en sensornod. Det implementerade biblioteket kan ändra delar av vattenmätarens konfigurering, ta emot data från vattenmätaren, samt vidarebefordra data via MQTT eller CoAP för vidare bearbetning hos servern.

This thesis deals with the issues 6LoWPAN protokolu and implementation of IPv6 on the specied platform. Introduction thesis deals with the explanation of wireless sensor networks. Next it was descibed 6LoWPAN protocol, which maps IPv6 on standard IEEE 802.15.4. The thesis further concentrates to exploration of possible operation systems, that are designed for sensor networks and then followed by comparison of their characteristics and advantages. The fth chapter is focused on he implementation of the operating system to the sensor node Iris, introduction Iris and with the structure of the operating system Contiki OS. At the end of thesis is description of the implementation of this system in the sensor node Iris.

L'Internet des objets (IoT) implique la connexion des appareils embarqués tels que les capteurs, les électroménagers, les compteurs intelligents, les appareils de surveillance de la santé, et même les lampadaires à l'Internet. Une grande variété d'appareils intelligents et en réseau sont de plus en plus à la disposition de bénéficier de nombreux domaines d'application. Pour faciliter cette connexion, la recherche et l'industrie ont mis un certain nombre d'avancées dans la technologie microélectronique, de la radio de faible puissance, et du réseautage au cours de la dernière décennie. L'objectif est de permettre aux appareils embarqués de devenir IP activé et une partie intégrante des services sur l'Internet. Ces appareils connectés sont considérés comme les objets intelligents qui sont caractérisés par des capacités de détection, de traitement, et de réseautage. Les réseaux personnels sans fil à faible consommation d'IPv6 (6LoWPANs) jouent un rôle important dans l'IoT, surtout sur la consommation d'énergie (de faible puissance), la disponibilité omniprésente (sans fil), et l'intégration d'Internet (IPv6). La popularité des applications sur le Web, aux côtés de ses standards ouverts et de l'accessibilité à travers d'une large gamme d'appareils tels que les ordinateurs de bureau, les ordinateurs portables, les téléphones mobiles, les consoles de jeu, fait que le Web est une plateforme universelle idéale pour l'IoT à l'avenir. Par conséquent, quand de plus en plus d'objets intelligents se connectent à l'Internet, l'IoT est naturellement évolué pour la provision des services des objets intelligents sur le Web, comme des millions de services Web d'aujourd'hui. Puis vient une nouvelle opportunité pour des applications vraiment intelligentes et omniprésentes qui peuvent intégrer des objets intelligents et des services Web conventionnels en utilisant des standards Web ouverts. Nous appelons ces applications les applications IoT sur le Web. Cette thèse propose une solution complète pour la provision de 6LoWPAN avec une annotation sémantique pour pousser le développement d'applications IoT sur le Web. Nous visons à offrir des services d'objets intelligents pour le Web et les rendre accessibles par beaucoup d'API Web qui existe en considérant des contraintes de 6LoWPAN comme les ressources limitées (ROM, RAM et CPU), la faible puissance, et la communication à faible débit. Il y a quatre contributions: (i) La première contribution est sur l'architecture globale de la provision sémantique de services pour les applications IoT sur le Web qui comprennent trois sous-systèmes: le système de communication des services, le système de provision des services, et le système d'intégration des services. (ii) La deuxième contribution étudie un modèle d'interconnexion entre les réseaux 6LoWPAN et les réseaux IPv6 réguliers par la conception, la mise en oeuvre et l'évaluation de la performance d'un 6LoWPAN qui constitué des MTM-CM5000-MSP TelosB motes pour les objets intelligents, et le Raspberry Pi pour un routeur de bordure. (iii) La troisième contribution présente en détails de l'architecture, des algorithmes et des mécanismes pour la provision des services des objets intelligents fiables, évolutifs et sécurisés en respectant des contraintes de ressources limitées; (iv) La quatrième contribution est composée de deux applications innovantes IoT sur le Web pour l'intégration des services dans lesquels nous appliquons l'architecture proposée: un système d'automatisation de la construction (SamBAS) et une plateforme Social IoT (ThingsChat) / This dissertation proposes a complete solution to provision 6LoWPAN services with semantic annotation that enables the development of IoT applications on Web. We aim to bring smart object services to the Web and make them accessible by plenty of existing Web APIs in consideration of 6LoWPAN constraints such as limited resources (ROM, RAM, and CPU), low-power, and low-bitrate communication links. There are four contributions: (i) The first contribution is about the overall architecture of the semantic service provisioning for IoT application on Web consisting of three subsystems: service communication, service provisioning, and service integration. (ii) The second contribution studies the internetworking model between 6LoWPAN and regular IPv6 networks by a design, implementation, and performance evaluation of a 6LoWPAN consisting of MTM-CM5000-MSP TelosB motes with TI MSP430F1611 microprocessors and CC2420 IEEE 802.15.4 radio transceivers for smart objects, and Raspberry Pi for an edge router; (iii) The third contribution presents the detailed architecture, algorithms, and mechanisms for provisioning reliable, scalable, and secure smart object services with respect to its resource-constrained requirements; (iv) The fourth contribution is in application domain for service integration in which we apply the proposed architecture on two innovative IoT applications on Web: a building automation system (SamBAS) and a Social IoT platform (ThingsChat)

This thesis will investigate the possibility of developing a lightweight digitalcertificate solution for resource constrained embedded systems in 6LoWPANnetworks. Such systems are battery powered or energy harvesting devices whereit is crucial that energy consumption and memory footprints are as minimalas possible. Current solutions for digital certificates are found to be moredemanding than what is desirable and therefore an issue that needs to besolved.The solution that is proposed in this thesis is a profile for the X.509 cer-tificate standard for use with constrained devices and the Internet of Things(IoT). Furthermore, a compression mechanism is designed and implementedfor certificates following this X.509 profile.Results show that compressing certificates is a highly viable solution, de-spite the added complexity it brings.This new lightweight digital certificate solution will allow resource con-strained systems to be able to run for longer without being interrupted orneeding maintenance. / Denna avhandling undersöker möjligheten att utveckla lättviktslösning förinbyggda system med begränsade resurser i 6LoWPAN-nätverk. Eneheter isådanna system drivs på batteri och återvunnen energi från omgivningen därminimal energi- och minnesanvänding är avgörande. Nuvarande lösningar fördigitala certifikat anses vara mer krävande än önskvärt och det är därför ettproblem som behöver lösas.Lösningen som presenteras i denna avhandling är en profil för certifikatstan-darden X.509 för användning med begränsade enheter inom Internet of Things(IoT). Utöver det är en komprimeringsmekanism designad och implementeradför certifikat som följer denna X.509-profil.Resultat visar att det är högst genomförbart att komprimera certifikat,trots den ökade komoplexiteten det medför.Denna nya lösning för digitala certifikat tillåter resursbegränsade enheteratt köras längre utan att behöva avbrytas eller underhållas.

Yes / The recent advancements in wireless sensor hardware ensures sensing multiple sensor data such as temperature, pressure, humidity, etc. using a single hardware unit, thus defining it as multi-sensor data communication in wireless sensor networks (WSNs). The in-processing technique of data aggregation is crucial in energy-efficient WSNs; however, with the requirement of end-to-end data confidentiality it may prove to be a challenge. End-to-end data confidentiality along with data aggregation is possible with the implementation of a special type of encryption scheme called privacy homomorphic (PH) encryption schemes. This paper proposes an optimized PH encryption scheme for WSN integrated networks handling multi-sensor data. The proposed scheme ensures light-weight payloads, significant energy and bandwidth consumption along with lower latencies. The performance analysis of the proposed scheme is presented in this paper with respect to the existing scheme. The working principle of the multi-sensor data framework is also presented in this paper along with the appropriate packet structures and process. It can be concluded that the scheme proves to decrease the payload size by 56.86% and spend an average energy of 8-18 mJ at the aggregator node for sensor nodes varying from 10-50 thereby ensuring scalability of the WSN unlike the existing scheme.

The Internet is one of the greatest innovations ever created by mankind, and it is a technical trend that has moved into industries to facilitate automation, supervision and management in the form of IoT devices. These devices are designed to be extremely lightweight and operate in low-power and lossy networks, and therefore run a low duty cycle and CPU-clock frequency to reserve battery life. Fog nodes are located on site to minimize network delay and provide centralized processing to handle data from hundreds of connected devices in wireless sensor networks. This is the future of industrial automation. Our goal is to show the functionality of an industrial IoT network within the scope of Fog computing by implementing a closed-loop control system in Cooja. Performance evaluations considered network reliability in terms of packet delivery ratio and timeliness. We assume that wireless IoT devices are running RPL routing (one of the most common standard routing protocols for IoT applications). We implement a mobility controller at the Fog-server in order to collect measurements made by the Fog nodes and send commands to IoT devices. In this thesis work, we assume that the commands are related to the mobility pattern of mobile node (e.g. AGVs in industrial automation) in order to avoid collision. From the simulation results we can conclude that sampling rates and node density have a greater impact on performance compared to payload size. We cannot be sure that our results reflect what a real-world evaluation would imply as we are running an emulation software, even though it has a very realistic physical layer. We do however believe that with substantial testing and improvements to both Cooja and our implementation, an accurate representation can be accomplished and algorithms in Cooja can be moved to real-world implementations.