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.

Orientador: José Luiz Rybarczyk Filho / Resumo: O objetivo deste trabalho foi produzir um dispositivo coletor de biopotenciais por EEG de baixo custo. Como características o protótipo apresentou alta imunidade a ruído, faixa de frequência de trabalho e tensão, seguindo as especificações necessárias para a coleta dos sinais EEG. O circuito eletrônico e o roteamento foram desenvolvidos no software Eagle R e então a placa foi construída pelo método fotográfico com posterior corrosão por percloreto de ferro e solda-gem manual dos componentes. O circuito montado é composto por: amplificadores diferenciais configurados com um ganho na ordem de 169,66, filtros de frequência intercalados e um mi-crocontrolador ESP32@ que munido de conversor analógico-digital foi configurado para uma amostragem de 356 amostras por segundo e resolução de 12 bits, o que possibilitou leituras com passos de 2,198x10-4 V. Os filtros foram projetados para atuar na redução de ruidos contidos na faixa de 50 a 60Hz. O funcionamento do dispositivo móvel microcontrolado teve seu funciona-mento comprovado através do método de detecção de ondas alfa, ondas estas que alteram suas intensidade quando nos encontramos concentrados com os olhos abertos ou fechados. A captura de ondas alfa compreendidas entre 8 a 13 Hz foi validada nas seguintes condições: 1 minuto com os olhos fechados (alta atividade) e 1 minuto com os olhos abertos (baixa atividade). O dispositivo produzido mostrou-se promissor como uma alternativa de baixo custo e com simpli-cidade de produção, qu... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The objective of this work was to produce a low cost EEG biopotential collecting device. As characteristics the prototype presented high immunity to noise, working frequency range and voltage, following the specifications required for the collection of EEG signals. Electronic circuit and routing were developed in the Eagle R software and the plate was then constructed by the photographic method with subsequent iron perchloride corrosion and manual soldering of the components. The assembled circuit consists of: differential amplifiers configured with a gain of the order of 169.66, frequency filters interleaved and an ESP32 @ microcontroller which has an analog-to-digital converter configured for a sampling of 356 samples per second and resolution of 12 bits, which allowed for readings with steps of 2.198x10-4 V. The filters were designed to act in the reduction of noise contained in the range of 50 to 60Hz. The operation of the microcontrolled mobile device has proven its function through the method of detecting alpha waves, waves that change their intensity when we are concentrated with the eyes open or closed. The capture of alpha waves between 8 and 13 Hz was validated under the following conditions: 1 minute with eyes closed (high activity) and 1 minute with eyes open (low activity). The device produced was promising as a low-cost, simplified production alternative when compared to models available on the market for EEG signal capture. / Mestre

Home surveillance is a major concern in this day and age as with the rapid increase in the technology around us. There is a need to get updated with new possibilities to make our lives better and easy. Some cases and situations exhibit the need for home monitoring. So, we set out to discover a solution to this problem of home monitoring. Generally, we have issues with pets and kids alike such as approaching dangerous places like electric switches, stairs, and hot things. Not only a problem with kids and pets but also a chance of burglary and stranger's unusual activities. To overcome this problem we are designing and prototyping a system to keep an eye on kids, pets, and older people. This system is used in other applications like theft monitoring. The device can monitor the field all the time. In this way, this system helps in-home monitoring. The system consists of Arduino, which is the brain of the system, the PIR sensor, ESP32-CAM, and buzzer. The PIR sensor detects motion then gives input to the Arduino. Arduino gives output to the ESP32-CAM and buzzer. The ESP32-CAM can be activated and sends information to the user through the web Interface and the application. The user can see the video streaming on the PC screen or any other display. The buzzer can emit a high volume signal indicating that "there is an alert at the home".

The diploma thesis clarifies the issue of creating inscriptions on stone slabs. It describes some types of sensors, actuators, their physical principles and possibilities of their use. The work mentions the limitations and specifics of sandblasting, design solutions and implementation of equipment for patternless sandblasting.The functionality of the device is demonstrated and verified on illustrative examples.

This thesis describes the concept and  realization  of embedded system and cloud application, which is designed  for remote monitoring of car subsystems over CAN bus.    There are written several ways of getting information from car subsystems  and process of decoding messages sent over internal car bus.   Data gathering is realised by device based on ESP32, which is sending them to cloud application using wireless networks. Application UI is adapted for mobile devices and serves views containg current and historical gathered data.

This work deals with the design and implementation of Wi-Fi LED lighting. It consists of various modules - switches, buttons, single or multicolored light sources - and a central unit that provides mutual communication and automation. The result of the work is the design of a prototype and several modules, which are built on the basis of the microcontroller ESP32. Their utility is implemented in C++. The user interacts through the website. The main result of this thesis is a demonstration of the possibility of using Wi-Fi to control light sources and creating complex lighting using a combination of simple modules and rules.

Satellites are evolving around the globe, expanding our possibility to explore space and many other applications. This thesis project is a model satellite used for teaching purposes in the course IE120V Electronics and Programming for Space Applications provided at KTH Royal Institute of Technology. The model can be used to teach Science, technology, engineering, and mathematics (STEM) in high school. The satellite is inspired by the MIniature Student saTellite (MIST) project carried out by the KTH Royal Institute of Technology, and hence this project will be called ”MiniMIST.” The MiniMIST aims to perform functions carried out on practical satellites. The onboard computer performs real-time image capturing, reads temperature from the surroundings, and analyzes power from solar panels and the power supply (batteries). The ground station setup is used to communicate with the satellite (MiniMIST) and receive data to be viewed and analyzed. The ESP32-Wrover was used as the main computer to run the MiniMIST. It was programmed with MicroPython and C++. Client-server communication using HTTP protocol emulated the communication between the ground station and MiniMIST with Web-Server communication. The ground station is a web page programmed using HTML, CSS, and JavaScript along with the AJAX framework. The thesis aims to build a working prototype of MiniMIST by dividing it into three sections: Hardware design, onboard computer software, and ground station software. / Satelliter utvecklas runt om i världen, vilket utökar vår möjlighet att utforska rymden och många andra applikationer. Detta examensarbete är en modellsatellit som används för undervisningsändamål i kursen IE120V Elektronik och programmering för rymdtillämpningar som ges vid Kungliga Tekniska Högskolan. Modellen kan användas för att lära ut naturvetenskap, teknik, ingenjörskap och matematik (STEM) på gymnasiet. Satelliten är inspirerad av projektet MIniature Student saTellite (MIST) som genomförts av Kungliga Tekniska Högskolan, och därför kommer detta projekt att kallas ”MiniMIST”. MiniMIST syftar till att utföra funktioner som utförs på praktiska satelliter. Datorn ombord utför bildtagning i realtid, läser av temperatur från omgivningen och analyserar ström från solpaneler och strömförsörjningen (batterier). Markstationsinställningen används för att kommunicera med satelliten (MiniMIST) och ta emot data som ska ses och analyseras. ESP32-Wrover användes som huvuddator för att köra MiniMIST. Den programmerades med MicroPython och C++. Klient-serverkommunikation med hjälp av HTTP-protokoll emulerade kommunikationen mellan markstationen och MiniMIST med webbserverkommunikation. Markstationen är en webbsida programmerad med HTML, CSS och JavaScript tillsammans med AJAX-ramverket. Avhandlingen syftar till att bygga en fungerande prototyp av MiniMIST genom att dela upp den i tre sektioner: Hårdvarudesign, inbyggd datormjukvara och markstationsmjukvara.

Cell culture is a fundamental procedure in many laboratories and precedes much research performed under the microscope. Despite the significance of this procedural stage, the monitoring of cells throughout growth is impossible due to the absence of equipment and methodological approaches. This thesis presents a low-cost, power-effective and versatile microscope with small enough dimensions to operate inside an incubator. Besides image acquisition, the microscope comprises other functions such as a data pipeline, implemented to save the images on the user’s computer via a server whilst also offering storage of the images on an integrated micro SD-card. Furthermore, a machine learning algorithm with a human-in-the-loop approach has been trained to segment the acquired images for cell proliferation and cell apoptosis tracking, and yielded promising results with an accuracy of 94%. For comparison, conventional segmentation techniques using operations such as the watershed function were deployed.The microscope described is versatile in operation as it offers the user to utilise one or more functions, depending on the purpose of the imaging. / Cellodling är en grundläggande process i många laboratiorium och föregår forskning som utförs under mikroskop. Trots inkubationens betydelse har övervakning av celler i detta skede inte varit möjlig på grund utav avsaknaden av relevant utrustning och metodologiska tillvägagångsätt. I denna examensuppsatts på avancerad nivå presenteras ett lågkostnads-, energieffektivt och versatilt mikroskop av centimeterstora dimensioner anpassat för användning i en inkubator. Förutom bildtagningsmekanismer erbjuder mikroskopet olika funktioner som till exempel ett integrerat dataflöde som möjliggör sparande av bilder på användarens dator via en server samtidigt som den erbjuder sparande av bilder på ett integrerat minneskort.Utöver detta har en human-in-the-loop maskininlärningsalgoritm för segmentation av celler implementerats i syfte att övervaka cellernas celldelning och celldöd. Denna algoritm påvisade goda resultat med en nogrannhet på 94%. I jämförelsesyfte har även en traditionell watershed-baserad cellsegmenteringsteknik utvecklats.Mikroskopet kan kallas versatilt då det tillåter användaren att anpassa dataflödet och välja vilka funktioner denne vill nyttja, allt utefter bildtagningens ändamål.

Artificiell intelligens syftar på en maskins förmåga att fatta egna beslut. Maskinen skall sedan utföra en handling baserat på beslutet, allt detta utan människans inblandning. Positionsnoggrannheten för fartyg är något som på senare tid ställs allt högre krav på, inte minst i offshoreindustrin. Med hjälp av ett Dynamic Positioning system kan högre noggrannhet uppnås. I detta projekt undersöks vilket system som är lämpligast att använda för ett positioneringssystem för en modell av skolfartyget Calmare Nyckel. Projektet utvärderar positionering med hjälp av fyra accesspunkter jämnt fördelat över två nätverk. Projektet belyser en rad olika tekniker baserade på datasignaler som sedan moduleras av en hårdvaruenhet. Då projektet är av så kallat low-cost resulterade valet i en ESP32 och WiFi som teknik. Laborationer påvisade ett väl fungerande system. Uppmätt noggrannhet var dock inte tillräcklig för att använda rakt av i det fortsatta projektet. / Artificial intelligence is a machines ability to make its own decisions. The machine is then supposed to take action based on the decision, this without the involvement of a human. The positional accuracy for ships is something that has become increasingly more demanding, especially in the offshore industry. With the aid of a Dynamic positioning system, a great accuracy can be achieved. This undertaking investigates which system that will be most suited to use for a positioning system aimed for a model of the ship, Calmare Nyckel. The project evaluates positioning with the aid of four access points evenly distributed over two networks. The project illustrates a number of different techniques based on data signals, which are then modulated by a hardware unit. Because of the low-cost aim, this resulted in the usage of ESP32 and WiFi as the systems of choice. Laborations in the undertaking proved a well working system. Measured accuracy, however, was not sufficient to use directly in the continued project.

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.