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INTRODUCTION-:
It offers an integrated SMS alert and remote control system. This unit can be integrated into any diesel generator in the Bundu Power range and allows for the following items to be monitored and controlled.
1. Up to 9 different alarm signals to be sent directly to your cell phone.
e.g: "Diesel Low" or "Oil Pressure Low"
2. The Generator can be Started or Stopped by sending an SMS to the generator from anywhere in the world. Used in conjunction with the alert you can decide when to turn on and off your generator even if you’re not at home or the office when the lights go out.
The SMS unit is mounted inside the generator housing (space permitting) and runs off the generators battery. When the generator is in automatic mode it will start-up when the power fails and in doing so sends an SMS to UP TO 5 predetermined phone numbers. An SMS can then be sent back to the generator using a predetermined "code" and command. The code allows you to safe guard the generator from malicious SMS have to turn it on and off. If the generator has a problem when running it will again send an SMS to up to 5 users notifying them of the problem encountered. When the generator is shuts down the user is also notified, allowing them to confirm that the generator has successfully shutdown.
The unique SMS Alert and command system allows users to quickly and easily control their Generator worldwide, with the knowledge that problems can be sorted out quickly and efficiently. In addition to that, the security system allows for safe and secure use without interference
INTRODUCTION-:
The project is aimed at developing and testing the use of mobile phones to remotely control an appliance control system. The microcontroller would then control an device based on the information given to it. The proposed solution will need to be easy to use, simple, secure, robust and be useful on most mobile phones. To achieve this testing will need to be carried out to create a useful system.
The report consists of a background into the area of 8051 microcontroller and mobile communication, how they are interfaced to each other and AT (Attention) commands set used in communication.
HARDWARE USED
1. AT command supporting GSM mobile phone.
2. 89S52 Microcontroller
3. Max 232 IC.
4. Relays
5. Relay driver IC ULN 2803
6. Voltage regulator 7805.
7. Diode IN4007
8. GSM Phone
SOFTWARE USED
1. Keil u-Vision 3.0
Keil Software is used provide you with software development tools for 8051 based microcontrollers. With the Keil tools, you can generate embedded applications for virtually every 8051 derivative. The supported microcontrollers are listed in the µ-vision
2 PRO51 Programmer Software
THEORY OF OPERATION
In this project we interfaced 8051 microcontroller with Motorola’s C168 GSM mobile phone to decode the received message and do the required action. The protocol used for the communication between the two is AT command.
The microcontroller pulls the SMS received by phone, decode it, recognizes the
Mobile no. and then switches on the relays attached to its port to control the appliances. After successful operation, controller sends back the acknowledgement to the user’s mobile through SMS.
AT-Command set
The following section describes the AT-Command set. The commands can be tried out by connecting a GSM modem to one of the PC’s COM ports. Type in the test-command, adding CR + LF (Carriage return + Line feed = \r\n) before executing. Table gives an overview of the implemented AT-Commands in this application. The use of the commands is described in the later sections.