Rositsa Maksimova, M.Sc.

Systems, file formats and, in general, open source products are a trend in the development of modern systems and technologies today, providing sustainability in knowledge and freedom to choose services and products. The flexibility in the field of custom-built systems, copyright modifications, design ideas, and in general systems that work the way consumers want is due to the open source concept. At the heart of such a concept is the idea of ​​free software, which can be used, studied, copied, modified without restriction and distributed in modified or unmodified form again without restriction or only on condition that future users will have the same rights and manufacturers of free software products will also provide the source code. This book is a product of the author's matser's thesis. It addresses the application of the open source concept when using a computer system to fetch environmental data. The Raspberry Pi hardware platform was chosen for such a system along with two add-on modules (HATs - Hardware Attached on Top) - the first as a smart battery module - PiJuice, and the second - a basic sensor module (Sense HAT), which is fundamental part of the Astro Pi mission, allowing the Raspberry Pi to feel the world around it. Flights of the system are being realized with the assistance of an unmanned aerial vehicle - drone, thus the possibilities of the system's operation in different atmospheric conditions are presented as well as revealing new ideas in the world of sensors.

• 1 x Arduino Uno R3 microcontroller board (Atmega328p)
• 4 x 330 Ω Resistors
• 1 x 2.2 kΩ Resistor
• 1 x 1 kΩ Resistor
• 1 x 10 kΩ Resistor
• 1 x 1N4004 Diode
• 3 x LEDs
• 1 x Photoresistor
• 1 x PIR sensor
• 1 x N-Channel MOSFET Transistor
• 1 x TMP36 Temperature sensor
• 2 x 100 nF Capacitor
• 1 x 5V Fan
• 2 x Push button
• 1 x 2 Pin DIP Switch
• 1 x Buzzer

Dog house. The photoresistor controls the lighting in the cottage. The temperature sensor monitors the room temperature and controls the ventilation motor. The ventilation speed is adjusted using 4-speed switches. A motion sensor monitors the presence of Rocky and, in the absence of more than the set time, an alarm is triggered, which is deactivated by a detected movement or by a RESET button on the whole system on site by the owner. There is also a separate button for instant control lighting in the cottage.

NGO Zeybekler, headed by Metin Hasan, was established in the town of Momchilgrad in 2006. The repertoire of the ensemble is multicolored, including both Balkan and Turkish authentic motifs. The group's activities are related to traditional-style songs and dances. The ensemble includes in its repertoire a wide range of dances, rituals, customs and songs collected from different regions of the Balkans and Anatolia in various styles presented by the dancers and performed with the honey voice of Rositsa Maksimova - Rossi RM. With its active participation, Zeybekler occupies an important place in the cultural life of the Balkans and is one of the most preferred groups in the region. In addition to its participation, the group has 3 won and realized projects named "Children's Ethnic Festival" - Momchilgrad 2007-2009, published the first edition of the book entitled "Springs from The Eastern Rhodopes" and annually performs its artistic music format named "SOLISTIAD". In its 12-year creative way Zeybekler has peformed over 180 times in Bulgaria and countries like Turkey, Greece, Sweden and Macedonia. The current music album contains 11 selected Turkish songs performed by Zeybeckler's pearl - Rossi. We are deeply grateful for the sponsorship of all our sponsors!

The Internet of Things is developing at a rapid pace. The need to reduce power consumption, increase device reliability and improve wireless communication between devices leads to the search for modern approaches to accomplish these tasks. LoRaWAN is a good alternative in the process of long-term and large-scale communication, as well as when it is necessary to fetch information from inaccessible places. This concept was realized as a part of the overall realization of the idea. LoRaWAN-based The Things Network (TTN) products send data to the TTN's server. This is done through a protocol called MQTT, relying on the provided TTN application interface that allows tranceiving messages to and from IoT devices. All requests are executed in Python programming language and imported into a web application developed through Plotly's Python web application development platform. This combination of software techniques would provide an opportunity to implement a panel for real-time graphical representation and monitoring of data transmitted and received through TTN. In addition to the ability to actually monitor live data, the ability to upload spreadsheets that can be accessed and previewed directly from the web application is also available.

LoRa (Long Range) is а part of today's large-scale low-power (LPWAN) networks and а radio-frequency (RF) layer-based signalling technology (PHY layer 1 фром the OSI model of computer networks). Therefore, through a LoRa modem, the data can be converted to this signal. While there are other, more well-known RF technologies (such as Bluetooth or WiFi), LoRa is known for its improved sensitivity and transmitting range - covering up to kilometers under good conditions. This makes it suitable for large-scale networking solutions.
LoRaWAN is a Media Access Control protocol (MAC) developed by the LoRa Alliance for large-scale Communication, acting as a bridge between signals and applications. It allows data to be transferred to devices connected to an application. This is a technology based on the data layer of a telecommunications network. In combination with LoRa RF signal technology, LoRaWAN enables implementing of low-energy, cost-effective, long-term and bidirectional telecommunication solutions used in various situations. These advantages and the ability to reduce the number of devices needed (compared to other communication methods such as mobile networks and WLANs) make LoRaWAN suitable for IoT networks. Its operating principles enable battery powered devices to communicate with Internet-based applications through long-range wireless connectivity.
An application can be any software package that LoRaWAN devices can communicate with on the Internet. There are different types of applications from customized to preset integrations provided by various cloud services that can be used without the need for code writing. These are called integrations and include features such as: synchronizing and managing LoRaWAN devices; design, prototype and visualize real-time IoT solutions or historical data; a collection of APIs; integrations for sending and receiving data over HTTP; publication of real-time data exchange broker connection data in IoT; integrations for storing persistent data in databases for several days, retrieving data, using the API available over HTTPS and serving in JSON format; summary and analysis of live data streams etc. Ready integrations are a good option for beginners, but for more flexible deployment, we could dive into the world of programming, for example by creating our own and powerful custom web application. For this purpose, a web application called "LoRaWINE Application" was developed to act as a dashboard for real-time monitoring and management of processes. It is designed to monitor various technological live conditions, such as conditions in a wine barrel during the wine aging phase of the entire wine production technology.

Live food web application

Food quality control is an important factor in avoiding food poisoning. In recent years, particular attention has been paid to the traceability of inputs in the food industry. All food processing companies are required to build and maintain Hazard Analysis and Critical Control Point (HACCP) systems for hazard analysis and control. Food tracking is increasingly becoming a growing concern for consumers and scientists around the world. Food tracing is currently carried out mainly at the administrative level, using the means of documentary tracking of raw materials and finished products. Tracking became a legal instrument in 2005 in Europe, applicable to all marketed foodstuffs to ensure their food safety. In these circumstances it became imperative to implement tracking systems for minimizing the production and distribution of dangerous or poor-quality foods. The evolution of computer technologies requires a shift to real-time traceability. To build such modern systems, the experience gained from the development of the Internet of Things can be used. Based on the use of network connectivity, a new trend is being developed, called Internet of Food (IoF). Building an Internet of Food infrastructure for active mobile traceability is in its infancy and many scientists are offering different conversion models. The purpose of all the proposed solutions is to collect objective machine information about the basic technological parameters in the processing and marketing of food. Regardless of the solutions offered, end nodes are a key element in any active food quality monitoring system. The sensor unit is in direct access to raw materials and finished products and determines what technological parameters will be monitored and archived. The mobile end node requires web monitoring. For this purpose, a mobile application called "Live Food Web Application" for food monitoring and tracking has been developed. It tends to enable the monitoring of various technological conditions in real time, such as conditions around/in meat products during their storage.