In today's era of technology, information can revolve the whole world within seconds via Internet. Devices such as smartphones, tablets and smart applications running on them enable users to access information anytime and anywhere over the air network. Ubiquitous nature of smartphones stimulates the growth of applications development, especially for small scale devices. Protection and security of sensitive mobile applications and their resources against threats are new emerging challenges for mobile application developers. Even competitive enterprise application development organizations lack comprehensive security services for small scale devices. Ultimately unpredictable threats become active anytime and can easily hamper the whole infrastructure within short time frame. In future enterprise applications, to protect entities and overall access of back-end secure infrastructure and services secure and easy to deploy strong authentication and authorization services will play a key role. Complexity of security risks in wireless networks is changing the ways of protection mechanisms for mobile applications. Achieving security balance with convenience becomes a challenging task for application developers. Due to complex blurred picture of an attack in an enterprise applications development, usually the developers don't pay attention against the mitigation of such threats at the initial phase of application development. Due to this, weaknesses appear in latter stages that make an application system vulnerable. Conventionally it is a common practice by application developers to rely on username/password authentication mechanism, and even more secure way that is considered to be a One Time Password (OTP) or complex passphrase schemes. These schemes have a number of limitations and drawbacks regarding today’s diverse wireless environments. In this research we used Public Key Infrastructure (PKI) certificate-based strong authentication scheme for small scale devices which is a significant step-up from simple username/password, OTP and location-based authentication schemes. Leading standards which we followed FIPS 201 Personal Identity Verification standard and FIPS 196 Strong Authentication Protocol scheme. Our solution is based on secure smart microSD card that can be used for providing high level of security for mobile enterprise applications. Also other considerable security services included confidentiality of exchanged transaction messages between applications and back-end application provider server, integrity of transaction messages, and non-repudiation services.

The topic of this thesis is the design and realization of a modular Data concentrator for various types of measurements in diverse conditions. The device conception, basic principles, design and functionality are described herein. Also, the lightweight protocol design for radio communication, standardized XML format for data storage and cloud usage are described. The electrical design of the device as well as the design of the printed circuit board was made using the Eagle Autodesk electronic design automation software (Eagle Autodesk EDA). The control software written in C/C++ for a target microcontroller (ESP32-WROOM-32) is based on a FreeRTOS platform and ESP-IDF framework. An IDE for managing this software is Visual Studio Code with PlatformIO extension. Selected and used Cloud Platform is ThingSpeak from Mathworks, which uses certain components from Matlab platform.

Master‘s thesis is focused on problematic about state of RC plane model during the flight. Device is able to measure overload, height, position, pressure and velocity of the flight and store this measurement data to memory medium. The main aim of the master‘s thesis was to design a functional board, firmware for device and design simple program for evaluating of measured data. Involvement consists of five basic parts. First part is microcontroller, which processes measurement data and communicate with others parts. Next is accelerometer. Accelerometer is used for scanning overload of the plane. Barometer is used for measurement of height and pressure. For measuring position and velocity is used GPS module. Last part is memory medium. MicroSD is used as memory medium for storing measurement data. Evaluation of measured data is realized as simple program with base graphical user interface. Program was created in Matlab.

Thesis deals with Datalogger with Ethernet interface controlled by Raspberry Pi 2. Datalogger is equipped with eight digital inputs and three analogue inputs. It allows storage of measured data into the database on the microSD card. It communicates over an Ethernet interface on the Raspberry Pi. The administration and control of the datalogger is possible trought a web server.

Master’s thesis contains description parameters of microcontroller ATMEGA644P, also contains differences between older and newer version of microcontrollers ATMEGA644 and ATMEGA644PA. Inside structure of microcontroller, memories and peripherals are described here. The construction of the universal microcontroller unit is main target of this thesis. The unit contains supply, A/D converter, current loop, communication interfaces, temperature sensor, accelerometer and other. The unit collects and saves data, communicates by interfaces and manages other functions. Using devices and circuits are described in this thesis. Development of software for microcontroller(firmware) are positioned to last part of this thesis. This software control functions of all parts positioned on the unit.