06-07-2012, 11:53 AM
GSM BASED AUTOMATIC IRRIGATION SYSTEM
NET WORK GSM BASED AUTOMATIC IRRIGATION SYSTEM.doc (Size: 2.56 MB / Downloads: 106)
INTRODUCTION
The project is mainly used to control the on-off action of a motor in the field based on the dry and wet conditions of the field using GSM Technology.
The Main Components of Project
Microcontroller
Vehicle or Robot
DC Motors, to run the Vehicle
Sensing logic
LCD, to display the status of the field and the communication between circuit and the user mobile.
Power Supply
Working:
This project is developed based on EMBEDDED and GSM Technology. When a field is in the dry condition, the sensing logic senses the state of the field and intimates it to the microcontroller. It in response makes the motor on. We can know the status of the field by sending a message to the GSM modem which is placed at the field. Through our mobile we can switch on-off the motor by sending the respective commands to the kit through the GSM modem. Thus the irrigation motor can be controlled through our mobiles using GSM technology.
EMBEDDED SYSTEMS
An Embedded System is a special-purpose computer system designed to perform one or a few dedicated functions often with real-time computing constraints. It is usually embedded as part of a complete device including hardware and mechanical parts..
Embedded system controls many of the common devices. Physically, embedded systems range from portable devices such as digital watches and MP4 players. Now it ranges to large stationary installations like traffic lights, factory controllers, or the systems controlling nuclear power plants. Complexity varies from low, with a single microcontroller chip, to very high with multiple units, peripherals and networks mounted inside a large chassis or enclosure.
Embedded processors can be broken into two broad categories: ordinary microprocessors (μP) and microcontrollers (μC), which have many more peripherals on chip, reducing cost and size.
Embedded systems are designed to do some specific task, rather than be a general-purpose computer for multiple tasks. Some also have real-time performance constraints that must be met, for reason such as safety and usability; others may have low or no performance requirements, allowing the system hardware to be simplified to reduce costs.
Examples of Embedded Systems
Automatic teller machines (ATMs)
Cellular telephones and telephone switches
Home automation products, such as thermostats, air conditioners, sprinklers, and security monitoring systems
Handheld calculators and computers
Household appliances, including microwave ovens, washing machines, television sets, DVD players and recorders
Medical equipment
Industrial controllers for remote machine operation.
An embedded system is not always a separate block - very often it is physically built-in to the device it is controlling the software written for embedded systems is often called firmware, and is stored in read-only memory or Flash memory chips rather than a disk drive. It often runs with limited computer hardware resources: small or no keyboard, screen, and little memory.
User Interfaces
Embedded systems range from no user interface at all - dedicated only to one task - to full user interfaces similar to desktop operating systems in devices such as PDAs.
A full graphical screen, with touch sensing or screen-edge buttons provides flexibility while minimizing space used the meaning of the buttons can change with the screen, and selection involves the natural behavior of pointing at what's desired.
The rise of the World Wide Web has given embedded designers another quite different option providing a web page interface over a network connection. This avoids the cost of a sophisticated display, yet provides complex input and display capabilities when needed, on another computer. This is successful for remote, permanently installed equipment. In particular, routers take advantage of this ability.