ANDROID BASED HOME AUTOMATION AND ENERGY CONSERVATION

Wireless Sensor Network (WSN) consists of three main components: nodes, gateways, and software. The spatially distributed measurement nodes interface with sensors to monitor assets or their environment. In a WSN network the devices are connected to WSN nodes wherein the entire nodes uses Zigbee network to transfer the status of connected applications to a controller which controls the whole applications but the main drawback of Wireless sensor networks is its high interference, low coverage area and ability to control only low power devices. In order to overcome these drawbacks Android equipped devices are used to control the applications over GPRS network. Android equipped devices allow the user to control various applications over wireless networks. Being an open sourced platform it allows the user to design a custom module which controls the home applications by connecting the android equipped device and its corresponding home applications to an MCU wherein it uses relay circuits to connect the entire applications using GPRS network to connect the application controller and the android device. These devices can be used to control industrial applications, home applications like light, fan etc., and thereby conserving electricity

Sulautettu ohjelmistototeutus reaaliaikaiseen paikannusjärjestelmään

Asset tracking often necessitates wireless, radio-frequency identification (RFID). In practice, situations often arise where plain inventory operations are not sufficient, and methods to estimate movement trajectory are needed for making reliable observations, classification and report generation. In this thesis, an embedded software application for an industrial, resource-constrained off-the-shelf RFID reader device in the UHF frequency range is designed and implemented. The software is used to configure the reader and its air-interface operations, accumulate read reports and generate events to be reported over network connections. Integrating location estimation methods to the application facilitates the possibility to make deploying middleware RFID solutions more streamlined and robust while reducing network bandwidth requirements. The result of this thesis is a functional embedded software application running on top of an embedded Linux distribution on an ARM processor. The reader software is used commercially in industrial and logistics applications. Non-linear state estimation features are applied, and their performance is evaluated in empirical experiments.Tavaroiden seuranta edellyttää usein langatonta radiotaajuustunnistustekniikkaa (RFID). Käytännön sovelluksissa tulee monesti tilanteita joissa pelkkä inventointi ei riitä, vaan tarvitaan menetelmiä liikeradan estimointiin luotettavien havaintojen ja luokittelun tekemiseksi sekä raporttien generoimiseksi. Tässä työssä on suunniteltu ja toteutettu sulautettu ohjelmistosovellus teolliseen, resursseiltaan rajoitettuun ja kaupallisesti saatavaan UHF-taajuusalueen RFID-lukijalaitteeseen. Ohjelmistoa käytetään lukijalaitteen ja sen ilmarajapinnan toimintojen konfigurointiin, lukutapahtumien keräämiseen ja raporttien lähettämiseen verkkoyhteyksiä pitkin. Paikkatiedon estimointimenetelmien integroiminen ohjelmistoon mahdollistaa välitason RFID-sovellusten toteuttamisen aiempaa suoraviivaisemin ja luotettavammin, vähentäen samalla vaatimuksia tietoverkon kaistanleveydelle. Työn tuloksena on toimiva sulautettu ohjelmistosovellus, jota ajetaan sulautetussa Linux-käyttöjärjestelmässä ARM-arkkitehtuurilla. Lukijaohjelmistoa käytetään kaupallisesti teollisuuden ja logistiikan sovelluskohteissa. Epälineaarisia estimointiominaisuuksia hyödynnetään, ja niiden toimivuutta arvioidaan empiirisin kokein

TelosRFID an ad-hoc wireless networking capable multi-protocol RFID reader system

Radio Frequency IDentification (RFID) is rapidly being adopted as a powerful tool used in object tracking access control, telemedicine and inventory management. Its basic architecture endows reader devices with the capability to wirelessly read stored data off of RFID tags. Because of competing standards, there is no unified air protocol for RFID communication. The proliferation of competing standards, paired with the proprietary nature of commercial readers, can make maintaining and upgrading an RFID infrastructure expensive and time-consuming. Part of the solution that this thesis proposes is an RFID reader which supports custom air protocol implementations. To further reduce the costs associated with the adoption of a new infrastructure, RFID readers would benefit from supporting ad-hoc wireless networking. This feature mitigates the need for an installed infrastructure and facilitates immediate deployment of RFID systems. The development of a multi-protocol RFID reader with ad-hoc wireless capabilities will be a boon for both the commercial and academic sectors. This thesis outlines the design of an ad-hoc wireless networking capable multi-protocol RFID reader system called TelosRFID. The name TelosRFID stems from the system\u27s combination of Crossbow Telos rev. B (TelosB) ZigBee motes with a custom 13.56MHz RFID reader board. The TelosRFID reader board is a custom hardware device that can communicate with 13.56MHz RFID tags. It runs custom firmware in order to control tag communications, manage tag presence monitoring, and relay tag information through the ZigBee network (via its attached TelosB mote.) The system is designed to be demonstratably useful. Its functionality can be visibly confirmed, and configuration errors are easily detected at every component in the system. This framework provides a reliable and established baseline for future enhancements to the system\u27s feature set