Deals with the design of a special security system in which, apart from the usual parts such as camera and motion sensor, a USB dongle will be used to send the recorded videos via UMTS or LTE mobile networks to the server where they can be viewed. Nowadays, when mobile operators offer unlimited tariffs and high-speed internet, this solution is very advantageous because we are not limited by the length of the Ethernet cable that we have to connect to the camera or the range of the Wi-Fi router when installing the camera. The only condition is that the area is covered by a high-speed Internet operator.
The aim of this thesis is to study the possibilities of transmission of video signals in nationwide mobile networks GSM, UMTS and LTE, as well as formats of output video signals from cameras and types of sensors for motion indication. Based on this knowledge, a block diagram of a system for monitoring the disruption of space with a focus on video transmission is proposed.
The entire system will be controlled by the Arduino YUN development board, which has a USB connector for the Huawei E398 modem and an Ethernet connector for any IP camera. If the motion sensor detects motion, the microprocessor sends a video recording request to the camera to the SD card. The time the video will be recorded will be optional in a program that is also part of the work. Once the video is stored in a compressed format on the card, it is sent to the remote FTP server via the modem where it will be available to the user.
The thesis consists of four main parts. The first block is devoted to the theory of motion sensors, their distribution and specific types available in shops, the division of cameras according to the type of sensor, the codecs they use, or the image resolution. Again, a few representatives are selected in the shops and analyzed. The last part of the first block is devoted to mobile communication. There are described individual mobile standards and USB modem Huawei E398, which is used in the thesis. The second block is devoted to a more detailed description of microprocessor communication with individual parts of the security system. There are individual operations needed to communicate with the camera, get the video from the camera in the required format or synchronize with the internet time.
The following is a detailed description of how to save a video to a memory card and then copy it to a remote server. Part of the thesis is also a program for working with videos that are already uploaded on a remote server and a detailed description of its function. The third block summarizes the testing of the security system, the speed of sending data, and comparing the quality of the video sent to the video server captured by another recording device. In the last block is described in detail the installation of the security system. There are individual steps leading to the correct functioning of the whole security system and a photograph of the complete connection.
FILE DOWNLOAD LINK LIST (in TXT format): LINKS-26111.zip
Published: 2019/06/15 Tags: arduino projects
Arduino UNO Luxmeter Project (LCD USB)
Arduino UNO Luxmeter Project (LCD USB)
When reviving a luxmeter on a printed circuit board, there was a problem that the proposed connection is inoperative.
The first option was quickly verified by measuring the printed circuit board with a multimeter. An error was found in the wiring. Grounding of MCP1258 was not connected to dissolved ground. The defect was fixed, but the device was still inoperative.
The Arduino UNO programmer, in which the ATmega328 single chip is fitted, can provide not only 5V voltage, but also 3.3V power. When testing the power supply voltage change, I found that although all components are compatible with 3.3V, but the wiring is not able to work with such a small voltage. The problem could be that the selected components would need more current than 2 AA batteries to provide. By interrupting the PCB, it was experienced to power the circuit with 5V from the programmer. The interruption had to be made so that the voltage difference did not damage the components in the wiring.
With this in mind, it was found that the error had to be made in PCB design. Looking at the connection, I found that the flying capacitors of the MCP1258 I had designed badly. This error was corrected, but the luxmeter printed circuit board device remained inoperative. When checking components, it was found that the choice of MCP1258 stabilizer was unsuitable because this type cannot add enough current to the circuit. For a time reason, the new wiring design could not be implemented, so the luxmeter was left on the test panel because it was fully functional.
Arduino YUN Security Project Modem USB PIR, IP Cam FTP
Traite de la conception d’un système de sécurité spécial dans lequel, en plus des pièces habituelles telles que la caméra et le capteur de mouvement, un dongle USB sera utilisé pour envoyer les vidéos enregistrées via les réseaux mobiles UMTS ou LTE au serveur où elles peuvent être visionnées. De nos jours, lorsque les opérateurs mobiles proposent des tarifs illimités et Internet haut débit, cette solution est très avantageuse car nous ne sommes pas limités par la longueur du câble Ethernet que nous devons connecter à la caméra ou la portée du routeur Wi-Fi lors de l’installation l’appareil photo. La seule condition est que la zone soit couverte par un opérateur Internet haut débit.
L’objectif de cette thèse est d’étudier les possibilités de transmission de signaux vidéo dans les réseaux mobiles nationaux GSM, UMTS et LTE, ainsi que les formats de signaux vidéo de sortie des caméras et les types de capteurs pour l’indication de mouvement. Sur la base de ces connaissances, un schéma de principe d’un système de surveillance de la perturbation de l’espace en mettant l’accent sur la transmission vidéo est proposé.