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Receiving RTTY decoder
Šuňal, Štefan ; Caha, Tomáš (referee) ; Lattenberg, Ivo (advisor)
This thesis deals with designing and implementing autonomous decoder for RTTY communication. Theoretical part of the thesis deals with researching the RTTY technology and FSK modulation, which it uses, focusing mainly on the methods of demodulation. Next part of the thesis compares suitability of available platforms. Practical part of the thesis describes the design and implementation of circuit board, firmware and computer application. The device is using STM32 microcontroller. Firmware was developed in C++ using Arduino. The computer application was created by using C\# and WPF. 3 methods of FSK demodulations were implmented. One is using a FFT algorithm. Other two calculate frequency based on the period of square signal.
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Smart water pump for water container
Janík, Vladimír ; Lattenberg, Ivo (referee) ; Caha, Tomáš (advisor)
This thesis deals with the implementation of a system for measuring the amount of water in the tank using a 12V water pump. The whole system is controlled by the ESP32 microcontroller. The introduction deals with the theoretical analysis of various principles of measuring the level of liquids. The next part deals with the procedure of the construction of the measuring device and its theoretical analysis. The last part of the work deals with the control of the pump and the individual functions that provide this control. The ultrasonic distance sensor AJ-SR04M was chosen for the implementation of the device. The volume of water in the tank is calculated from its data. The ESP32 microcontroller provides system control via a web interface. The whole system was implemented and tested to measure the volume of water and its pumping in the IBC container.
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Sensor of Soil Humidity and of Temperature
Karásek, Vojtěch ; Lattenberg, Ivo (referee) ; Škorpil, Vladislav (advisor)
The bachelor thesis deals with subject of battery powered radio sensor measuring soil humidity and temperature. In thesis is described LoRa wireless technology, it's basic principles, parameters and usage. There are described different kinds of soil moisture and temperature sensors. Finally, a particular sensor and base station design is addressed.
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Extraction of information from identity documents
Hudcovský, Erik ; Lattenberg, Ivo (referee) ; Caha, Tomáš (advisor)
This thesis is about the processing information from personal documents (ID card or passport) into the form that is further easily to be processed for computers and the IT industry in general. This process is implemented by the application I developed as part of my bachelor's thesis. The application contains the scanned document, the document type and the form of the required output. As the output we get the document type in the required format. The entire application is using in process an external OCR tool (OpticalCharacter Recognition), which is implemented so that it can be easily replaced by another OCR tool. I used Tesseract in my application. This OCR tool is the simpliest and most accurate of the free OCR tools at the same time. It also has strong community support and is still being developed. In this thesis, I also focused on its testing, both on the samples of text I created, and on real scans of documents. The application is also processed as an installation package, so it can be easily imported into other projects. The entire application is displayed as OpenSource on GitHube under the free license of MIT.
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Weather station with air quality measurement
Lacina, Jaroslav ; Hájek, Jaroslav (referee) ; Lattenberg, Ivo (advisor)
This bachelor thesis deals with the design and implementation of the wireless weather station with air quality measurement. At the beginning of the theoretical part, meteorology will be analysed. Afterwards, this work describes physical principles and the method of measurement of physical quantities that are measured by the meteostation. Next is the folloving technology described - Internet of things. The weather station is powered by a single battery and operates autonomously without any user intervention. It measures temperature, humidity, atmospheric pressure, CO2 and tVOC. Measured data are saved in to the cloud service ThingSpeak using a GSM signal. Further the work focuses on creation of web applications. The well organized graphs are created from the measured values.
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Collection of meteorological data using the MQTT protocol
Filippov, Andrii ; Šilhavý, Pavel (referee) ; Lattenberg, Ivo (advisor)
Cílem této práce je sběr meteorologických dat pomocí protokolu MQTT ze dvouvytvořených meteorologických stanic založených na mikrokontrolérech typu ESP32 a ESP8266. Práce pojednává o textovému formátu JSON, jeho struktuře podle řady kritérií a jeho dalšímu využití při přenosu dat z meteorologické stanice. Další fází je studium a srovnání hlavních charakteristik mikrokontrolérů ESP32 a ESP8266. Na základě zadání byly pak vytvořeny autonomní meteorologické stanice. Dále byly porovnány existující MQTTservery pro sběr, ukládání a přenos meteorologických dat mezi klientem a serverem. Závěrečnou fází práce byla tvorba programu v jazyce C#, který generuje grafy na základě hodnot aktuální teploty a relativní vlhkosti přijatých ze serveru MQTT. Výzkumný projekt se skládá ze dvou autonomních meteorologických stanic, ze kterých jsou přenášena meteorologická data v reálném čase na server MQTT prostřednictvím bezdrátového připojení. Server pak dále poskytuje data pro aplikaci v počítači uživatele, kde program kreslí v reálném čase grafy na základě dat přijatých z MQTT serveru.
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Electronic RLC meter
Dvořák, Radim ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
This work deals with measurement methods of passive components R, L ,C used almost in every electrical circuit. Work describes progress of choosing the right methods for measurement and also the process of designing the autonomous RLC meter with use of ATMEL microprocessor chips. The RLC meter will be powered from rechargable battery and will be able to measure primary attributes of RLC components.
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Device for automatic measurement of volt-ampere characteristics
Ondráček, Petr ; Vrba, Kamil (referee) ; Lattenberg, Ivo (advisor)
The Master's thesis discusses the design and realization of electronic meter of volt-ampere characteristics using Wifi module ESP32. The device is designed to be able to measure the characteristic in the voltage range of +/- 20 V and current range of +/- 200 mA. The device is controlled by web interface. The user is able to connect to it with for example his or her smartphone. This interface enables the user to configure various parameters, including the range of measurement and the power restriction. Furthermore, it is possible to graphically display the measured characteristic and export the data. To be independent on the outer network, the ESP32 is operated as an access point, which is creating a new simple network without the internet connection. In the Master's thesis, the principle of voltage and current measurement is explained theoretically, the circuit connection of device and the printed circuit board are designed and the cover of the device is modeled. Also the process of creating the device according to the design is described and the cover of the device is printed on 3D printer. After that, the control program is designed, described and uploaded into the resulting device. Finally, the functionality of the device is tested by measuring the volt-ampere characteristics of a few components.
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Accumulator tester with ESP32 module
Dresler, Jan ; Musil, Petr (referee) ; Lattenberg, Ivo (advisor)
This thesis focuses on design of printed circuit board and programming of ESP32 module. This module communicates with discharging circuit which allows testing of battery properties. With help of voltage and current sensors it is possible to test and print results of battery on display. The testing device also allows control over web user interface thanks to ESP32.
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Using Blazor technology with the DotVVM framework
Švikruha, Patrik ; Ilgner, Petr (referee) ; Lattenberg, Ivo (advisor)
DotVVM, WebAssembly, WASM, Blazor, ASP.NET Core, .NET Core, .NET, Mono, JavaScript, JavaScript engine, LLVM, AOT compiler, JIT compiler, WSL
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