WEB SERVER ON ARDUINO WITH AUTHORIZATION AND GRAPHIC REPRESEN-TATION OF INFORMATION FROM SENSORS

2019 ◽  
pp. 99-112
Author(s):  
A. Myasischev ◽  
L. Komarova ◽  
R. Gritsky ◽  
K. Kulik
Keyword(s):  
Transfer Rate ◽  
Graphical Representation ◽  
Data Transfer ◽  
High Reliability ◽  
Web Server ◽  
Programming Environment ◽  
Data Transfer Rate ◽  
Development Environment ◽  
High Data ◽  
Remote Client

In the work on the basis of Arduino Mega and the W5100 controller, a web server is built for graphical display of remote client data obtained from temperature, pressure, humidity sensors. The server program is written in the Arduino IDE development environment. The Ethernet library for the W5100 has been updated, which for Arduino IDE ver. 1.0.3, 1.0.5-r2 caused the server to hang. The possibility of using the Dygraphs library for graphical visualization of data obtained with sensors is shown. Written scripts for drawing graphics for the projected web server. The data transfer rate from the Arduino web server for various network controllers ENC28J60, W5100, W5500 for the Arduino IDE programming environment and UIPEthernet, Ethernet, Ethernet2 libraries was analyzed. It is shown that with the lowest speed the data is transmitted by the web server with the ENC28J60 controller - 3.3Kb/s, with the largest controller W5500 - 23.4Kbytes/s. It is noted that these servers do not support multithreaded work. Therefore, they can not be used to create miniature universal web servers for processing multiple requests simultaneously. The server considered in the work can serve only one request from one remote client. The speed parameters of data transfer for the server on the ATmega328p microcontroller (Arduino UNO) with the network controller ENC28J60 are analyzed. The server program is implemented in C language in the AVR Studio programming environment. A high data transfer rate of 140Kb/s and a possibility of multithreading are noted. It is established that with simultaneous transmission of three files to different clients, the total transmission speed reaches 120-130Kb/s, and for each client 40-50Kb/s. It is shown that the use of such a server to solve the problem of graphical representation of data from sensors is difficult due to the complexity of transferring software to other microcontrollers and the limited library for working with a microSD card. The operation of the server developed here for three years has shown high reliability of its operation. The paper discusses the creation of a web server on the Arduino, which is a modernized HTTP basic authentication. The upgrade consists in the fact that for authorization a password is used from the list of passwords that is selected by the user on the basis of the key sent by the server. With each new login to the server, the previous password becomes invalid. Presents a practical example of a web server on Arduino Mega, Ethernet controllers: enc28j60 and w5500.

Miniature Two-Axis Actuator for High-Data-Transfer-Rate Optical Data Storage System

2002 ◽  
Vol 41 (Part 1, No. 3B) ◽  
pp. 1804-1807 ◽  
Author(s):  
Gakuji Hashimoto ◽  
Hiroki Shima ◽  
Kenji Yamamoto ◽  
Tsutomu Maruyama ◽  
Takashi Nakao ◽  
...  
Keyword(s):  
Data Storage ◽  
Transfer Rate ◽  
Data Transfer ◽  
Storage System ◽  
Optical Data Storage ◽  
Optical Data ◽  
Data Transfer Rate ◽  
High Data ◽  
Data Storage System

Domain and write–read characteristics for magnetic field modulated magneto‐optical disk with high data transfer rate

1989 ◽  
Vol 66 (12) ◽  
pp. 6138-6143 ◽  
Author(s):  
Harukazu Miyamoto ◽  
Toshio Niihara ◽  
Hirofumi Sukeda ◽  
Masahiko Takahashi ◽  
Takeshi Nakao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transfer Rate ◽  
Data Transfer ◽  
Optical Disk ◽  
Data Transfer Rate ◽  
High Data

scholarly journals Theoretical Study of a Surface Collinear Holographic Memory

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 70
Author(s):  
Hirayama ◽  
Fujimura ◽  
Umegaki ◽  
Tanaka ◽  
Shimura
Keyword(s):  
Data Storage ◽  
Transfer Rate ◽  
Data Transfer ◽  
Coefficient Of Thermal Expansion ◽  
Storage System ◽  
Reconstructed Image ◽  
Data Transfer Rate ◽  
Holographic Memory ◽  
High Data ◽  
Volume Holograms

Holographic memory is currently attracting attention as a data storage system capable of achieving a data transfer rate of about 105~106105~106 times that of an optical disc such as Blu-ray disc. In conventional holographic memory, data is generally recorded by optical writing using volume holograms. However, a volume hologram has the problem not only that it is required to have high mechanical accuracy of a system and low coefficient of thermal expansion of a recording medium, because reconstruction tolerance is extremely low, but also that duplicating time efficiency is poor because whole data cannot be recorded at once. In this paper we proposed surface holographic memory that achieved a high data transfer rate, stable readout performance, and collective duplication by expressing holograms with fine surface asperity. Furthermore, the theoretical formulas of recording and reconstruction processes in the proposed system were derived and the reconstruction characteristics of the hologram were evaluated by numerical simulation. As a result, the proposed method generated reconstructed image readout with sufficient signal for a single page recording. However, the reconstructed image had noise, which was particular to a surface holographic memory.

Feasibility Study on High Data Transfer Rate of 300 Mbit/s with 8-Beam Laser Diode Array

1993 ◽  
Vol 32 (Part 1, No. 11B) ◽  
pp. 5411-5416 ◽  
Author(s):  
Ryoichi Arai ◽  
Makoto Mizukami ◽  
Takaya Tanabe ◽  
Kikuji Katoh ◽  
Takashi Yoshizawa ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Laser Diode ◽  
Transfer Rate ◽  
Data Transfer ◽  
Diode Array ◽  
Data Transfer Rate ◽  
Laser Diode Array ◽  
High Data ◽  
Beam Laser

scholarly journals Adaptive-speed/CAV algorithm in a CD-ROM drive to accomplish high data transfer rate and low power consumption

1998 ◽  
Vol 34 (2) ◽  
pp. 407-410
Author(s):  
S.G. Stan ◽  
H. Van Kempen ◽  
C.-C.S. Lin ◽  
M.-S.M. Yen ◽  
W.W. Wang
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Transfer Rate ◽  
Data Transfer ◽  
Low Power Consumption ◽  
Data Transfer Rate ◽  
Cd Rom ◽  
High Data

High data transfer rate near-field recording system with a solid immersion lens for polymer cover-layer discs

2007 ◽  
Author(s):  
D. M. Bruls ◽  
J. I. Lee ◽  
C. A. Verschuren ◽  
J. M. A. van den Eerenbeemd ◽  
F. Zijp ◽  
...  
Keyword(s):  
Transfer Rate ◽  
Data Transfer ◽  
Near Field ◽  
Recording System ◽  
Solid Immersion Lens ◽  
Data Transfer Rate ◽  
Cover Layer ◽  
High Data ◽  
Field Recording

scholarly journals High Data Transfer Rate and High Density Optical Disk Head.

2000 ◽  
Vol 28 (9) ◽  
pp. 590-599
Author(s):  
Kenya GOTO ◽  
Satoshi MITSUGI ◽  
Kazuma KURIHARA ◽  
Kazuhiro SUZUKI ◽  
Young Joo KIM ◽  
...  
Keyword(s):  
Transfer Rate ◽  
Data Transfer ◽  
Optical Disk ◽  
High Density ◽  
Data Transfer Rate ◽  
High Data

Materials Issues in the Development of High Data-Transfer-Rate Phase-Change Compounds

2001 ◽  
Vol 674 ◽  
Author(s):  
Martijn H.R. Lankhorst ◽  
Herman J. Borg
Keyword(s):  
Experimental Data ◽  
Glass Transition ◽  
Phase Change ◽  
Transfer Rate ◽  
Phase Change Materials ◽  
Data Transfer ◽  
High Data Rate ◽  
Data Transfer Rate ◽  
Glass Transition Temperatures ◽  
High Data

ABSTRACTA model is presented to calculate glass-transition temperatures. This model in combination with experimental data is used to evaluate archival-life stability of common phase change materials Ge2Sb2Te5 and doped eutectic Sb2Te compositions.On the basis of this model, novel high-data-rate phase change compositions have been identified near and on the pseudo-binary line InSb-GaSb in the ternary system Ga-In-Sb.

Sign in / Sign up

Export Citation Format

Share Document