Parallel Redundancy System for Critical Conditions Monitoring and Alerting

Monitoring critical conditions is of outmost importance in any system for achieving long life and stability. In this process, various parameters can be classified as critical and their values must be kept within a bounded interval by means of monitoring and acting upon a change in the value. A practical example of critical conditions monitoring is temperature monitoring in data centers (server rooms) where the temperature value must be kept below a certain threshold in order to achieve long life and stability of equipment. This paper presents a system designed for monitoring temperatures and alerting of their critical values is proposed - PRSMA. With a parallel redundancy feature that guarantees high reliability of the proposed solution, this approach achieves timely alerting upon critical condition, real-time supervision of temperature values and forecasting of critical conditions. The redundancy aspect is realized by using a mobile operator link alongside with the Internet-based landline connection to a cloud-based service – the Internet of Things concept. The proposed architecture is tested in laboratory conditions and the advantages of this approach are shown through measurement and testing

THE DESIGN OF EMBEDDED WEB SERVER FOR REMOTE LABORATORIES MICROCONTROLLER SYSTEM EXPERIMENT

Abstract— Remote laboratories are innovations in educational technology which allows students to access and interact with laboratory equipment remotely via the Internet network. There are several advantages of using a remote laboratory is the laboratory's performance is better and more efficient because of laboratory equipment can be used by students throughout the day for 24 hours. This paper presents a new design remote laboratory-based embedded web server for practical microcontroller systems. This system has several advantages compared with traditional remote laboratory based on computer server, which are small size, low power consumption, low cost and easy installation and maintenance. Design an embedded web server using 8 bit microcontroller AT89S52. The system consists of a computer server, some experiment module microcontroller system and some embedded web server for controlling modules. The computer server is used as a web server remote lab gateway that serves as a homepage and user management. Embedded web server serves as the user interface to control the lab module microcontroller via the internet. Experiment module is evaluation board AT89SXX microcontroller and is equipped with some I/O circuit. Users can perform remote process on experiment module that is: upload binary files to the target board, observing the changes via a web cam and can interact with the target board through a virtual I/O. Embedded web server is working with pure HTML instructions so that the system is more secure because it only uses port 80 only. Design remote labs are multiuser, so that at the same time can be used by more than one user. Keywords—Remote laboratories; Embedded Web Server; Microcontroller