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1. ARM EMBEDDED WEB SERVER BASED ON DAC SYSTEM
Abstract:
Data-Acquisition systems are in great demand in industry and consumer applications. In
some applications, human beings have been replaced by unmanned devices that will acquire data
and relay the data back to the base. There are data-acquisition and control devices that will be a
substitute for a supervisor in a multisite job operation. A single person can monitor and even
interact with the ongoing work from a single base station. Networked embedded systems have
become quite important nowadays, especially for monitoring and control the home or industrial
devices. The server enables Web access to distributed measurement/control systems and provides
a scalable networking solution that is optimized for educational laboratories, instrumentation,
Industrial and home automation.
Existing system:
In existing system, if the host needs to connect more serial devices at the same time with
higher transmission rate and the data processing is more complex, the system performance is
poor. In addition, these serial devices connect the same host may be geographically far and this
will increase the length of wiring and drop communication quality.
Proposed system:
In the proposed system, GPRS technology is used. At first the GPRS Modem is
configured for IP. The temperature sensor, gas sensor and humidity sensors are connected to the
ARM Processor. These values are measured and transmitted through GPRS Modem. At the
receiver end another modem is used to receive the data and it is uploaded into internet.

2. Block Diagram:
Data Acquisition Section:
Power
Supply
MAX 232
LCD
ARM 7
LPC2129
GSM/GPRS
Modem
Micro
Temperature
Sensor
Controller
Humidity Sensor
Gas Sensor
Receiver Section:
MAX 232
GSM/GPRS
Modem

3. Hardware requirements:
 ARM 7 LPC2129 Microcontroller with Power Supply
 Temperature sensor
 Humidity sensor
 Gas sensor
 Max 232
 LCD
 GSM/GPRS Modem
 PC with .net
Software requirements
 Embedded c
 Keil C Compiler
 VB .NET
Advantages
 Eliminates the need for server software and maintenance.
 Minimizes Operational Cost.