National Repository of Grey Literature 183 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
PDU with Consumption Metering Function for Single-Board Computers
Ondráček, Roman ; Růžička, Richard (referee) ; Šimek, Václav (advisor)
The aim of this thesis is to design a power distribution unit for single-board computers that can switch its individual outputs and also measure electrical quantities (voltage, current and power) based on the Espressif ESP32 platform and to design a web interface for the management of these power distribution units. This solution will be mainly aimed for the use of power distribution units in the development process of embedded devices built on top of single board computers. The proposed solution consists of a power distribution unit and a management information system, the communication between the different parts is done using the MQTT protocol. The information system can be used to control the individual outputs of the power distribution unit, to view graphs of the measured quantities.
Wireless Sensor Network
Nosko, Matúš ; Materna, Zdeněk (referee) ; Zemčík, Pavel (advisor)
The work was focused on creating a secure sensor network based on mesh topology, built on devices from Espressif. It also concentrates on code security and connecting this network to the cloud. The mesh network created is dynamic, regenerative, and self-organizing. The entire network is built on Wi-Fi, making it easy to connect to the internet, as the only condition for its operation is to have Wi-Fi at the installation site, eliminating the need for any special device to connect the network to the internet - it's gatewayless. Even if one node fails, the network self-organizes according to the newly created conditions and continues to function. The most modern security methods are used to secure the devices, such as secure boot and flash encryption. The MQTT protocol is used to connect the mesh network to the server. The MQTT broker, database, and API interface on the server side are dockerized. Thanks to these docker containers, it is easy to extend server parts. Also, values from devices are stored in a database and displayed on a website. The entire network solution was implemented in the ESP-IDF environment and tested on ESP32-S3 devices.
Communication infrastructure for drone swarm
Kubant, Michal ; Mikulka, Jan (referee) ; Janoušek, Jiří (advisor)
This thesis deals with creation and testing of wireless communication network used for transmission of multimedia and telemetry data in swarm of unmanned aerial vehicles. In the first part of this work are presented functions of the IEEE 802.11ax and their possible usage. The second part if thesis describes configuration of network elements in the wireless network, and discusses maximum transmission speed. The third part presents testing of the assembled network, designs and use of protocols for multimedia streams in a swarm of drones. Also the results are briefly evaluated and illustrated. The fourth part analyzes the methodology of testing the network in the outdoor environment, it discusses the results obtained by using this methodology in different outdoor spaces, and further proposes suitable solutions for improving the efficiency and range of the wireless network.
Nixie clock
Ščípa, Samuel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
This thesis focuses on the design and implementation of a nixie clock. In the introduction, the thesis deals with the history of the origin and the principle of the function of this vintage technology. It describes in detail the function and design of the support and control circuits to operate these character discharge tubes. It addresses the design and implementation of the hardware part of the clock. Further, the software part of the device is discussed in detail, which provides the normal functionality of the clock, such as stopwatch, alarm, timer, temperature measurement, supplemented with modern features such as Wi-Fi, RGB backlight a USB-C for power and programming. The final stage is the implementation and testing of the finished device.
Automatic monitoring of fluid density
Bebej, Rastislav ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
This thesis focuses on creating a device capable of monitoring the density of liquids during the fermentation process. The thesis includes the selection of a suitable principle for the measurement of the density of liquids, including the temperature compensation, the selection of suitable components and the design of schematics. Furthermore, the thesis deals with the design of a printed circuit board and wireless data transmission to a computer via Wi-Fi.
Wireless Communication Module for Educational Kit Minerva
Fiľo, Richard ; Strnadel, Josef (referee) ; Šimek, Václav (advisor)
In this thesis, we are concerned with the design of an extension module that will provide wireless communication capability to the Minerva platform. The result of our work is an adapter that is attached to the Minerva platform and then our expansion module is inserted into it using an M.2 connector. The module supports Wi-Fi 4.2, BLE 5 and LoRa standards. For the selected module, we have created a communication interface designed to work easily with the module. In the following, we present worked examples and a demo application using this module. All components are tested and work as we expect.
Model of a shared transmission channel for future wireless communication systems
Sedláček, David ; Polák, Ladislav (referee) ; Kratochvíl, Tomáš (advisor)
The main objective of the thesis was to study modern and upcoming wireless systems and their coexistence in a shared transmission channel. Based on the knowledge gained, the design of a simplified transmission channel was implemented. The model was created in Matlab using several available extensions. The correctness of the model was verified at the end by laboratory measurements.
Smart home model
Kaniok, Vojtěch ; Jirgl, Miroslav (referee) ; Sýkora, Tomáš (advisor)
This bachelor thesis deals with exploration of possibilities in regard to automatic integration of devices into Home Assistant and creating a demonstration model of home automation. The theoretical part of this work presents the MQTT protocol, presentation containing description of functionality and comparison with the HTTP protocol. Furthermore, explanation of specific concepts for MQTT such as QoS, types of messages, possibilities of filtration etc.Introduction of the ZigBee communication standard. Following section introduces Open source platform Home assistant, description of architecture, various options of integrating devices, characterization and disadvantages of particular types of installations. Subsequently, I will describe alternatives of MQTT integration in Home Assistant and compare advantages and disadvantages. In the last section of this paper the reader is familiarized with final results, description of MQTT discovery protocol, test of ESP HOME platform and verification of functionality of automatic integration
Multifunction speaker with wireless connectivity
Baránek, Michal ; Kratochvíl, Tomáš (referee) ; Kufa, Jan (advisor)
Tato práce se věnuje multifunkčnímu systému s více možnostmi pro přenos zvukového signálu do reproduktoru. Problémem u dnes velmi populárních komerčních přenosných reproduktorů je absence autonomního zdroje hudby, například v podobě rádia. Proto je cílem této práce právě dosáhnout takového multifunkčního reproduktoru podobnému jako jsou komerční přenosné reproduktory, ale s možností přehrávání radia distribuovaného pomocí internetové sítě. Další z nejdůležitějších funkcí těchto reproduktorů je bezdrátové připojení, jako je Bluetooth, pro streamování zvuku, například z telefonu do reproduktoru. Další významné aspekty těchto reproduktorů jsou jednoduché uživatelské rozhraní, převážně ve formě ovládacích tlačítek, kvalitní zvukový výstup s přiměřeným výstupním výkonem k velikosti reproduktoru a velkou výdrží baterie pro několika hodinový poslech na nízké nebo střední úrovni hlasitosti. Proto jsou i tyto všechny funkce implementovány v této práci výroby multifunkčního reproduktoru.
Automatic Dosing Unit for Pool Chemistry
Kejík, Jan ; Štůsek, Martin (referee) ; Zeman, Kryštof (advisor)
The objective of this thesis was to design and construct the dosing unit for pool chemistry with the features of common available equipments, but with lower acquisition costs compared to these equipments. The initial part of this thesis describes the requirements for water quality in the pools and the principles of its sustaining. The next section describes the ESP32 microcontroller, which was selected because of sufficient computation power and memory resources and RF connectivity capability. Furthermore, the pH, ORP probes and temperature sensors for measurement of the pool water quality are described in this section. Lastly, sensor convertors, power supplies, pump controls circuit and display interface are described here. The key section of the thesis is the design description which consists of hardware, mechanical and software section. It starts by the description of the printed circuit board with a description of diagram. In the section followed is described and illustrated mechanical design of the box for this dosing equipment. It is my own design made by 3D print. The last design section deals with software consisting of three different kinds of software: display software, ESP32 microcontroller firmware written in C/C++ and HTML code of the webside. This description is focused especially on the firmware architecture of the processor ESP32 related to consecutive part including description of a local user interface as well as a web application. The resulting device was developed to the state with matured well tested user interfaces. However, the controls algorithms of pH and ORP were tested only in simulated conditions. Therefore the testing in real pool for verification of the firmware and reliability should be done in the next steps.

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