|
|
Web application for Mikrotik network nodes management
Vaňátko, Matěj ; Hajný, Jan (referee) ; Krajsa, Ondřej (advisor)
The thesis describes a comprehensive solution of a web application for administration of extensive LAN and WAN networks, which are based on nodes by MikroTik . There is a feasibility study, which says, what modules and what functionality should be included. Also a database structure is clarified and technical procedures of solution of the whole assignment are outlined with an emphasis on universality and maximal simplicity.
|
|
|
Automated Closing System based on Lighting Conditions
Hajný, Stanislav ; Krajsa, Ondřej (referee) ; Hošek, Jiří (advisor)
The bachelor’s thesis deals with the design and implementation of automated doors based on lighting conditions. The ESP32 module is used as the main computing unit. The final design consists of a power supply part and a computing part. The first part describes the theory of IoT and solar systems. Next, the individual subcomponents are described. The next part deals with the design of the device and the last describes the final implementation and results.
|
|
|
Programmable signal generator connected via USB
Patočka, Lukáš ; Krajsa, Ondřej (referee) ; Lattenberg, Ivo (advisor)
The subject of this thesis is design and construction of a periodic signal generator prototype. The generator will use Atmel XMEGA128A4U microcontroller with computer control managed via USB interface. The thesis contains general solutions to the problem of generating signals with a special focus on utilization of DA converter – digital synthesis and reconstruction of the signal from DA converter output to continuous signal. The thesis further deals with implementation of the USB layer using two libraries (LUFA library on microcontroller side and LubUsbDotNet library on computer side). The final solution will include DC step-up converter for signal peak amplitude assessment and summing amplifier for adding the DC voltage to the output signal. The application will allow for generating signals of various shapes including user-defined ones. These signals will be displayed in the actual application window. There, users will be allowed to create user-defined signal in easy-to-use GUI or load it directly from a file.
|
|
|
Implementation of Burglar Alarms in Smart Wiring Systems
de Groot, Štefan ; Krajsa, Ondřej (referee) ; Strašil, Ivo (advisor)
The thesis deals with technical and legislative possibilities of realization an electronic security system by components of intelligent electrical installation. In this thesis there are described common types of connection detectors to the installation, requirements for IAS units and depending on these facts, there is the demo panel designed and fixed by buttons, lights, thermoregulation unit, motion detectors, control unit and modules required for maintenance of present components. This system contains standard components of intelligent electrical installation, which in secure mode carries the duty of the IAS system. Output of this thesis is also laboratory exercise demonstrating possibilities of this system. It contains transparent instructions for putting this system into service and a batch of tasks, which will lead student over basics of programming in development environment Mosaic and optimization of the system for specific situations.
|
|
|
Sporttester with Bluetooth LE
Blažek, Vojtěch ; Komosný, Dan (referee) ; Krajsa, Ondřej (advisor)
This thesis deals with the design of a sporttester, which is a device capable of calculating the cadence of the taken steps and monitoring the impact force of foot on the ground while running. Exposure to long-term strong impacts while running can cause serious fatigue fractures of the hip, calf bone or the foot area. The purpose of the sporttester is to monitor and signal strong impacts to the runner, thus helping to prevent fatigue fractures. The aforementioned features are evaluated based on the change in acceleration measured by the accelerometer. The calculated values of step cadence, running speed and impact force are sent via Bluetooth Low Energy to a compatible mobile application.
|
|
|
Advanced Roaming in Wi-Fi Networks
Krulich, Filip ; Krajsa, Ondřej (referee) ; Ilgner, Petr (advisor)
This work deals with the issues of Wi-Fi roaming. It describes, how amendments of IEEE 802.11 focused on roaming, namely 802.11r, 802.11k and 802.11v, deal with these issues. Part of this work is designing a topolgy based on OpenWrt system, on which to test roaming before and after using these amendments. After testing, lower roaming times are exhibited, thanks to using these standards. There is also designed an identical topolgy based on Mikrotik devices, on which it’s demonstrated, that Mikrotik devices do not support these standards.
|
|
|
End-to-end encryption protocol for IEEE 802.15.4
Bača, Jaromír ; Člupek, Vlastimil (referee) ; Krajsa, Ondřej (advisor)
Tato práce se zabývá problematikou šifrování komunikace mezi nízkonapěťovými zaří-zeními, které jsou ovládány pomocí mikrokontrolerů. V rámci práce byly používány dvěvývojové desky deRFnod, které byly osazeny čipy AVR ATmega 128 RFA1, které umož-ňují bezdrátovou komunikaci. Na těchto zařízeních probíhal vývoj a testování aplikace.Finálním výstupem práce je návrh aplikace pro asymetrickou výměnu klíčů, která je založena na eliptických křivkách. Tato aplikace je implantována v Atmel LightWeight, kde je i řešena otázka vzájemné komunikace mezi komunikujícími body. Vygenerovanýklíč je dále použit pro širfování komunikace pomocí šifrovacího algoritmu AES, který jejiž implementován ve využitém LightWeigt protokolu. Toto šifrování umožňuje nejenomšifrování koncových bodů, ale i komunikačního tunelu. Taková ochrana poskytuje uživatelům anonymitu dat a znemožňuje nebo velmi znesnadňuje potenciálním útočníkům zařízení fyzicky lokalizovat na základě znalosti směrování dat v síti.
|
|
|
Electric energy meter with support of automatic remote acquisition
Skala, Milan ; Krajsa, Ondřej (referee) ; Koutný, Martin (advisor)
This master’s thesis deals with design and implementation of electric energy meter with support of automatic remote data collection. For the collecting of measured data is used narrowband PLC technology. The theoretical part describes the basic properties and standards of narrowband PLC technology, such as types of coupling circuits, modulations, frequency bands and interference problems. In the practical part, there is description of selected parts, such as control circuit power meter, modem, microcontroller and UART to USB converter. There are further described basic properties of narrowband PLC modem ST7570 by STMicroelectronics. The final chapter, implementation of the device, deals with designs of circuit PLC modem ST7570, power meter ADE7753 and converter USB to UART CP2102.
|
|
|
Design and construction of measuring equipment for lightning research
Kirsanov, Ivan ; Krajsa, Ondřej (referee) ; Roubal, Zdeněk (advisor)
The main aim of this semester work is the design of meter of an electrostatic field in the open landscape. The theoretical part focuses on describing the theory of the creation of an electrostatic field and on proven measurement methods. The practical part of the bachelor's work is focused on the design of a measuring instrument, selection of components and justification. The practical part includes a block diagram of wiring.
|
|
| |
guest ::
