International Journal of Engineering Trends and Technology (IJETT) – Volume 4 Issue 9- Sep 2013
Design and Development of the Lab Remote Monitoring and Controlling
System Based on Embedded Web Technology
N.SREEKANTH REDDY1, V.PANDURANGA2, T. SWAPNA RANI3
M.Tech, Dept of ECE, CMR College of Engineering&Technology, Hyderabad, AP-India,
2
Asst Prof, Dept of ECE, CMR College of Engineering&Technology, Hyderabad, AP-India,
3
Asst Prof, Dept of ECE, CMR College of Engineering&Technology, Hyderabad, AP-India,
1
Abstract: Design of on-line embedded web server
is a one of the difficult task of many real time data
acquisition and control system applications. The
global system of interconnected computer networks
is called as World Wide Web which uses the standard
Internet Protocol Suite (TCP/IP) to aid billion of
users worldwide and enables the user to interface
many real time embedded applications like data
acquisition
and control
system,
Industrial
automations and safety measures etc,. In the
monitoring system, the existing resource of Ethernet
is used to remotely monitor the industrial parameters
remotely using web servers. This paper tells the
design and development of on-line Interactive Data
Acquisition and controlling using ARM11 based
embedded web server. It is permitted to form a
network. Single chip Interactive Data Acquisition and
control method increases the processing speed of a
system and also avoids the problem of poor real time
and reliability. This system uses ARM11 Processor
and Linux. Web server application is ported into an
ARM processor using embedded ‘C’ language. Web
pages are designed in hyper text markup language
(HTML). We are using Zigbee based wireless
technology to remotely collect sensor data and send
them to our web server board.
Keywords— ARM, Linux, Embedded web server,
Ethernet, TCP/IP protocol, Zigbee.
1. EMBEDDED WEB SERVER
1.1 The system diagram of Embedded Web Server:The system structure of embedded Web server is
shown in Fig. The entire system uses B/S mode. The
client PC is connected to the Internet through a
browser and then gets access to the embedded Web
server. Through this way, remote login and operation
are realized. Compared with the traditional C/S
mode, this mode is simple to use, convenient to
maintain, and easy to extend.
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Fig 1: system diagram of Embedded Web server.
The above Figure shows the system diagram of
Embedded Web server.
1.2 The choice of Embedded Web Server Generally
speaking, the embedded devices have limited
resources and don't need to handle the requests of
many users simultaneously. Therefore they do not
need to use the most commonly used Linux server
Apache. Web server which is specifically designed
for embedded devices are applied in such case . This
kind of Web server requires relatively small storage
space and less memory to run, which makes it quite
suitable for embedded applications. The typical
embedded Web server is https. https is a simplest
web server. If Web server only provides some static
web pages such as simple online help and system
introduction, then a static server can be adopted; if
you need to improve system security or interact with
users such as real-time status query and landing, then
you have to use dynamic Web technologies.
2. INTRODUCTION
Availability of personal computer and internet
everywhere is very useful for monitoring and
controlling remote devices and their parameters. A
web base control and monitoring system can make us
control a system without distance limit and cost
effective, programmable and high efficiency
controller webpage is necessary for the world
competition. The purpose of this paper is to build a
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International Journal of Engineering Trends and Technology (IJETT) – Volume 4 Issue 9- Sep 2013
remote control system through a webpage. And this
system is controlled through local area network by
using an embedded TCP/IP protocol suit which is
inbuilt in Linux kernel.
This paper realizes an embedded web server, which
enables data acquisition, control system, status
monitoring with the help of any standard web
browser. A web server in the device provides access
to the user interface functions for the device through
a device webpage. A web server can be embedded
into any appliance and connected to the Internet so
the appliance can be monitored and controlled from
remote places through the browser in a desktop. The
aim of the paper is to control the devices or
equipments from the remote place through a web
page. The web-server circuit is connected to LAN or
Internet. The client or a person on the PC is also
connected to same LAN or Internet. By typing the IPaddress of LAN on the web browser, the user gets a
web page on screen; this page contains all the
information about the status of the devices. The user
can also control the devices interfaced to the web
server by pressing a button provided in the web page.
Biggest advantage of this web server is embedding a
PC based web server into the ARM platform without
losing any of its features. It consists of application
program written in C for accessing data through the
serial port and updating the web page, porting of
Linux 2.6.3x Kernel with application program on
ARM11 board and booting it from the RAM. The
basic block diagram is shown in below figure.
Fig 3: Basic block diagram receiver section.
3. HARDWARE DESIGN
This system uses development board called as
Mini6410 from Friendly ARM Company. The board
is based on Samsung S3C-6410X microcontroller.
S3C-6410X is based on ARM11 processor
architecture from ARM Ltd. ARM processors are
generally used for designing mobile handheld devices
like smart phones, tablets etc with TCP/IP protocol
chosen for communication board. It is primarily used
in wireless public, TISCS, monitor and anti-theft
system. Main parts of hardware in tablet system are
as follows.
Fig 2: Basic block diagram transmitter section.
Fig 4:ARN11 interfacing
The monitoring and controlling boards based on 8051
micro-controller communicate with our ARM11
based web server board using Zigbee wireless
technology.
3.1 Processor Module:Samsung Company brings out a 16/32bit RISC
microprocessor called S3C6410X, which is designed
to hand-held devices and general applications, it is
cost-effective, low-power, and high-performance
microcontroller. To reduce total system cost, the
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International Journal of Engineering Trends and Technology (IJETT) – Volume 4 Issue 9- Sep 2013
S3C6410X includes the following components to
separate 16KB Instruction and 16KB Data Cache,
MMU to handle virtual memory management, LCD
Controller (STN & TFT), NAND Flash Boot Loader,
System Manager (chip select logic and SDRAM
Controller), 3-ch UART, 4-ch DMA, 4-ch Timers
with PWM, I/O Ports, RTC, 8-ch 10-bit ADC and
Touch Screen Interface etc. S3C6410X reduces the
whole cost of the system and enhances integration
and dependability of the system.
The Atmel AT89c51 processor which is a very low
cost processor based system for controlling and
monitoring we are using at the field.
3.2 Memory Module
This system adopts Flash memory and SDRAM
memory. As the internal memory of smart phone
system, SDRAM is designed for transfer, storage and
read-write internal data in the system. SDRAM
adopts two 32MB memory chips HY57V561620CTH
which are spliced to the data bus of 32 bit width, thus
increasing the speed of data access. 64M NAND
Flash, of which the type is K9F1208U0M, serves as
the flash memory of the system. As the hard disc of
the system, NAND Flash is mainly used for storage
of system boot, OS Kernel, file system, graphical
interfaces and application program.
4. SOFTWARE DESIGN
Software design is the key to embedded system.
Without powerful software as support, any hardware
would not take effect. Software designs of ARM11
development board mainly include the following:
4.1 Transplant U-Boot
At first, cross-compiling environment is built, which
is a code generated from one platform and used in
another platform. For this system, it is generated in
PC and can run on the development board. Armlinux-4.3.2 is used as the cross compilation toolchain. Transplanted Vi-Vi-boot will be done after
installing the cross compilation tool-chain and
configuring the development environment. Vi-ViBoot is at the boot loader stage. Boot loader is the
first software code after system powers up. It
initializes the hardware equipment and builds up the
map of memory space. Then the hardware and
software environment of the system may be suitable
for the OS Kernel boot. This system adopts Vi-Viboot-128M. Download and decompress source code.
Modify source code in order to support SBC-2410X
development board, and add the boot function of
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NAND Flash. Compiling Vi-Vi-boot-128M generates
a binary file vi-vi-boot.bin. Download it toSBC2410X development board through USB interface.
4.2 Transplant Linux Kernel
OS kernel is the centre of the operating system. A
complete operating system includes more tools,
libraries, application programs and kernel source.
Linux kernel source can be downloaded from Internet
free of charge. This system uses Linux-2.6.29.1
kernel source, a new edition published in 2009.
Plenty of new functions have been added into this
edition, thus expanding the system. Firstly, customize
Linux kernel source and modify the source code. Add
processor support, NAND flash chip support and
Yaffs2 file system support. Dispose the program
module in order to support the hardware module of
S3C-6410X development board. Then cross-compile
the kernel source to generate Image. At last,
download the mapping file to NAND Flash memory.
4.3 Load File System
By building, canceling, reading and writing,
modifying and copying files, file system can access
files by name and make access control. After Linux
system startup, root file system must be mounted
firstly. If not mounted from designated equipment,
the system will be treated as making mistakes and
quit startup. This system adopts Qtopia file system.
As a kind of file system designed for NAND flash
memory in embedded system, Qtopia has the
characteristics of high efficiency, short mount time
and small memory requirement.
4.4 Developing web-server and other applications
The software design of AT89c51 Monitoring and
controlling board we are doing in Keil Application
Software. This system adopts Otopia as the platform
for application program. We are using QT software
for developing Embedded Web server Application
and proving user buttons for controlling and
monitoring the parameters of the lab. GUI graphical
interface is designed by QT Creator. QT Creator, a
kind of design tool with visualized user interface, can
improve the development speed of QT application
program.
5. RESULTS
The setup of the embedded web server is shown in
fig. The ARM11 based development board acts as a
web server which is connected to the Ethernet
controller of the network. This board is accepting
data from 8051 based remote monitoring system and
present of web server. If user provides any control
action on web server then ARM board send
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International Journal of Engineering Trends and Technology (IJETT) – Volume 4 Issue 9- Sep 2013
appropriate controlled signals to 8051 board which
implement it and take action. So this project is
complete monitoring and controlling system with full
fledged Internet support.
5.1 Integrating OS and Embedded Web Server
The main part of the embedded web server is the OS
handling the web server application. Whenever, a
connection is established, a new task is created using
Linux OS. And the web server application is
executed for that user’s application, running in a task.
When a new connection is established, a new task is
created and the user’s application is executed in a
separate task as a separate application. This process is
continued for all the users connecting to the server.
5.2 Porting the Web server
The Embedded web server application and the OS are
ready and are to be ported on the target. The porting
is done using DNW tool. Now, the code is loaded on
the target and the target is configured over the
network, to work as an embedded web server.
5.3 Testing the embedded Web server
Testing: Initially, the target is tested for the working
of operating system. This is done by booting the
target using the hyper terminal. After the target is
successfully booted with Linux kernel, it is tested
over the network using ping command.The embedded
web server responding to the ping command made by
the client. Now the embedded Web server is
responding to the clients, request is made to the
server, embedded web server, by typing the IP
address of the server in the client’s browser. The user
has to enter “192.168.1.230 IP to access the server.
This request is taken by the operating system of the
client and given to the LAN controller of the client
system. The LAN controller sends the request to the
router that processes and checks for the system
connected to the network with the particular IP
address. If the IP address entered is correct and
matches to that of the server, a request is sent to the
LAN controller of the server and a session is
established and a TCP/IP connection is establishes
and the server starts sending the web pages to the
client. Fig shows the client entering the IP address of
the server and the server send the html page to the
requested clients.
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Fig 5: Users Entering the IP Address
Shows various clients connecting to the server and
getting the html page. Finally client can monitor the
Channel Data on Internet Explorer. The embedded
web server that has been designed can be used in
educational institutions, offices and many other
places. For web-based network element management
provide an administrator with a simple but enhanced
and more powerful user interface without additional
hardware.
Fig 6: Monitoring and controlling the Channel Data
on Internet Explorer
6. CONCLUSION
Web server application require very strict software
configuration. Because software contention and
architectures can significantly affect web server
performance and speed. Poorly designed and
configured software architectures might even
generate high response times while the physical
resources display low utilization. A remote user only
requires a common Internet browser to carry out
experiments on real hardware. The embedded web
server replaces the PC, which is required for remote
labs with special hard- and software. We can used
smart-mobile phones based web application to
monitor and control our embedded web server. So
such flexibility should be provided by web server
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International Journal of Engineering Trends and Technology (IJETT) – Volume 4 Issue 9- Sep 2013
designer which is essential part of modern web server
implementation
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