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Modular web-based interface using MikrotikAPI
Janda, Lukáš ; Frolka, Jakub (referee) ; Krajsa, Ondřej (advisor)
This diploma thesis is dealing with creating a web interface for managing and configuring RouterOS system using MikroTik API. Web interface is protected against intrusion unauthorized persons and contains mechanisms for managing users. This web interface allows extend the application using modules, which can extend functions of this interface. PHP framework was used for for creating this interface, configuration of RouterOS can be stored in a MySQL database.
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Intelligent electricity meter
Haman, Martin ; Musil, Petr (referee) ; Krajsa, Ondřej (advisor)
The diploma thesis describe design and realization of smart energy meter. The smart energy meter allows remote reading of the measured values and with connected externals modules also switching of connected load. The theoretical part covered measured values definition, required function analysis, components selection and design of smart energy meter. The practical part deal with firmware development, programming, remote control and reading of the measured values. The final chapter deal with realization and calibration of the smart energy meter.
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Design and realization of the pedal effect on Arduino platform
Gajarský, Tomáš ; Schimmel, Jiří (referee) ; Krajsa, Ondřej (advisor)
The topic of my bachelor’s thesis is the design and the construction of the pedal effect used by the Arduino Due, which is supplemented by the possibility of controlling through the internal web interface, which is mediated by the modul Arduino Ethernet Shield. The following effects are included: echo, tremolo, vibrato, chorus and flanger. For editing the guitar signal in order to interact with AD microcontroller converter, is used the input filter preamplifier circuit. In order of editing the output signal from Arduino is used summing and filtring output circuit for the guitar amplifier. The basic component for these circuits is operating amplifier OPA1644. The goal of this thesis was to create the proposal of the connection schemes, printed circuit board, the program code of the microcontroller, simple web page, as well as the construction and the measurement of the pedal effect.
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Possibilities of connecting the Asterisk softswitch to the 4th generation PBX
Halamík, Zdeněk ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
This master’s thesis dissertate the possibilities of the linkage between Asterisk softswitch and the 4th generation private branch exchange. This should create a new generation’s network, so-called NGN, by the convergence of existing telecommunication networks with an IP computer network. This master’s thesis is divided into several chapters. In introduction is described the evolution of the private branch exchanges as well as the principles of the voice digitizing, codecs and signaling commonly used in both TDM and VoIP networks. The main aim of this project is the configuration of Asterisk software exchange for connection with PBX Alcatel 4400 as well as public phone network PSTN. Another goal of this master’s thesis was the configuration of Alcatel PBX and diagnostics of CCS and CAS signaling on E1 interface. In conclusion there are summarized advantages of NGN networks and their utilization in the future.
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Gateway for sending of SMS messages
Bielczyk, Marek ; Krajsa, Ondřej (referee) ; Koutný, Martin (advisor)
The thesis is about SMS gateways. First part is focuses on the trends and requirements. After our expirience we design own project. This section contains the hardware GSM module, a complete server software which included working with AT commands php framework Nette and MySQL. Our solutions can be applied and adapted by the user requirements. The project, which was developed within our work is ready for multiplatform using.
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Multimedia networks in cars
Knopp, Petr ; Krajsa, Ondřej (referee) ; Koutný, Martin (advisor)
Moderní elektronika se stává nezbytnou součástí dnešních automobilů. Dynamicky se rozvíjející informační a telematické služby nacházejí široké uplatnění v automobilovém prostředí. Moderní aplikace vyžadují přenos velkého množství dat, což jim zajišťují dnešní komunikační protokoly. Cílem mé diplomové práce je analýza a návrh implementace multimediálních sítí do automobilů. Jednotlivé návrhy jsou charakterizovány a srovnány podle požadavků, kterým jsou v automobilovém prostředí vystaveny. Navržené topologie využívají nejen dnes používané technologie, ale jsou zde i návrhy, které nebyly dosud v automobilovém prostředí použity. Jednotlivé návrhy jsou srovnány a vyhodnoceny z pohledu automobilového výrobce.
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Floppy disk drive to USB adapter
Galád, Dominik ; Štůsek, Martin (referee) ; Krajsa, Ondřej (advisor)
The work deals with the design of a USB floppy drive driver. It describes the theory needed to design your own floppy drive driver and the output of individual components. The following is a schematic of the floppy drive driver design. The functions for controlling the floppy drive are described, as well as the pitfalls of the ATSAMD21J18A-AU processor used.
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Automatic Attendant application using Asterisk PBX
Benýšek, Jiří ; Krajsa, Ondřej (referee) ; Kovář, Petr (advisor)
Application of IP telephony is still more and more popular. This technology is designed for large companies as well as for home or office use. If customer needs to use advanced features of the private branch exchanges, he had to purchase more expensive solutions than common equipment. These professional products may be replaced by open source solutions, which can fully replace them. Private branch exchange Asterisk is one example of these products. Bachelor’s thesis is focused on IP telephony, treats of basic principles and network protocols used by this service. This thesis then describes the public branch exchange Asterisk, its possibilities for use in call centers and administration of call queues using this PBX. After theoretical analysis, this thesis deals with installation and configuration of this PBX. It includes installation of necessary operating system, additional packages containing necessary libraries and modules needed for correct function of the PBX. Configuration of Asterisk such as creation of user accounts of SIP protocol and dialplan is described in the next chapter and then all of these functions are tested. Achieved practical results are presented in the last chapter of this bachelor’s thesis.
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Motion activated measurement module with wireless interface
Novotný, Josef ; Krajsa, Ondřej (referee) ; Havránek, Zdeněk (advisor)
This semestral project deals with the selection of a suitable MEMS mechanical motion sensor with verylow power consumption. The market research is mainly about sensors that can be activated by motion. Project also contains description of motion activation function of the sensor ADXL362. Project also contains verification of datasheet data of the sensor ADXL362 for the motion activation. Further It also includes a market survey of microcontrollers with ARM Cotex M4 core. Furthermore, the wireless transmission via Bluetooth is tested and a measurement unit is designed and implemented. At the end of the thesis are achived results summarized.
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