The document describes a project aimed at developing a GSM-based energy meter reading and load control system, allowing users and the electricity department to remotely access meter readings and control electrical loads via SMS. It details the hardware and software components required, including the 8051 microcontroller and GSM modem, and outlines the functionality of the system and its components like the energy meter and LCD display. The project promotes efficiency and cost-effectiveness in utility management by eliminating the need for physical meter readings.

1. K.Kiran Kumar(14HU5A0202)
P.V.sai teja(13HU1A0209)
D.tejaswini(13HU1A0205)
K.Lakshmi(13HU1A0206) GUIDE
A.VIJAY KRISHNA

2. CONTENTES
1…..
ABSTRACT
2…..
BLOCKDIAGRAM
3…..
HARD WARE COMPONENTS
 8051 MICRO CONTROLLER
 GSM MODEM
 LCD
 LED
 RESISTORS
 CAPACITORS
 TRANSFORMERS
 RELAY
 REGULATOR
 ENERGY METER
 LAMP
 DIODES
4….
SOFT WARE COMPONENTS
 KEIL COMPLAIER
 EMBEDED C
5….
CONCLUSION

3. PROJECT DESCRIPTION
The main objective of the project is to develop a GSM based
energy meter reading system and load control through SMS.
Electricity department sends employees to take meter reading
every month, which is an expensive and time consuming job.
The proposed project provides a convenient and efficient method
to avoid this problem. The electricity department and the user can
get the readings of the energy meter of consumers via SMS. The
loads can also be controlled by the user of this system via SMS
using this project.

4. A microcontroller input is effectively interfaced to a digital
energy meter that takes the reading from the energy meter
and displays the same on an LCD. The reading of the
energy meter is also sent to the control room by an SMS via
SIM loaded GSM modem.
This GSM modem can also receive commands from the cell
phone to control the owner’s electrical loads. It uses a
standard digital energy meter that delivers output pulses to
the microcontroller to perform counting for necessary
action. On receiving command it can switch ON/OFF the
lOAD

5. BLOCK DIAGRAM

6. HARDWARE
REQUIREMENTS:
 8051 MICROCONTROLLER
 GSM MODEM
 LCD
 LED
 RESISTORS
 CAPACITORS
 DIODES
 TRANSFORMER
 REGULATOR
 RELAY
 ENERGYMETER
 LAMP
SOFTWARE
REQUIREMENTS:
 KEIL COMPILER
 EMBEDED C

7. HARDWARE REQUIREMENTS
ENERGY METER:
• An energy or electric meter is a device that measures the
amount of electrical energy consumed by a residence,
business, or an electrically-powered device.
• Electric meters are typically calibrated in billing units, the
most common one being the kilowatt hour.

8. MICROCONTROLLER:
• AT89S51
• It is a smaller computer
• Has on-chip RAM, ROM, I/O ports...
RAM ROM
I/O
Port
Timer
Serial
COM
Port
Microcontroller
CPU
A single chip

9. Features of AT89S51/52:
 Endurance: 10,000 Write/Erase Cycles
 4.0V to 5.5V Operating Range
 Fully Static Operating at frequency: 0 Hz to 33 MHz
 128 bits Internal RAM (Data Memory)
 Rom 4 KB (Program memory)
 32 Programmable I/O Lines
 Three 16-bit Timer/Counters
 Interrupt Recovery from Power-down Mode
 It contains 16 bit address buses
 It is 40 pin dual in package

10. PIN DIAGRAM OF AT89S51:
• 40 Pin IC
• 4 Ports
• 32 Programmable I/O Lines

11. 230 V AC
50 Hz
Bridge
rectifier
Filter(470µf)
5v Regulator
5V DC
12V step down
transformer
POWER SUPPLY:

12. SERIAL COMMUNICATION
• used for all long-haul communication
• Cables that carry serial data
• RS232 carries serial data in between micro controller
and MODEM through DB9 connector

13. MAX 232:
The MAX232 is an integrated circuit that converts signals from
an RS-232serial port to signals suitable for use in TTL
compatible digital logic circuits.
The MAX232 is a dual driver/receiver and typically converts
the RX, TX, CTS and RTS signals .
When a MAX232 IC receives a TTL level
to convert, it changes a TTL Logic 0 to
between +3 and +15V, and changes TTL
Logic 1 to between -3 to -15V, and vice
versa for converting from RS232 to TTL.

14. A relay is an electrically operated switch. Many relays
use an electromagnet to mechanically operate a switch,
but other operating principles are also used, such
as solid-state relays.
Relays are used where it is necessary to control a circuit
by a low-power signal (with complete electrical isolation
between control and controlled circuits), or where
several circuits must be controlled by one signal.
Relays with calibrated operating characteristics and
sometimes multiple operating coils are used to protect
electrical circuits from overload or faults
RELAY:

15. GSM COMMUNICATION
 The term GSM usually means the GSM standard
and protocols in the frequency spectrum around
900MHz.
 Mobile Station:
The MS is the physical equipment used by a
subscriber, most often a normal hand-held cellular
telephone.
 Base transceiver station:
The BTS comprises the radio transmission and
reception devices, and also manages the signal
processing related to the air interface.

16. GSM MODEM:
A GSM modem is a specialized type of modem which accepts a SIM
card, and operates over a subscription to a mobile operator, just like a
mobile phone.
From the mobile operator perspective, a GSM modem looks just like
a mobile phone.
When a GSM modem is connected to a computer, this allows the
computer to use the GSM modem to communicate over the mobile
network.
While these GSM modems are most frequently used to provide
mobile internet connectivity, many of them can also be used for
sending and receiving SMS and
MMS messages.

17. IR LED:
 An IR LED, also known as IR transmitter, is a special purpose
LED that transmits infrared rays in the range of 760 nm
wavelength.
The appearance is same as a common LED. Since the human eye
cannot see the infrared radiations.
The camera can show us the IR rays being emanated from the IR
LED in a circuit.

18. LIQUID CRYSTAL DISPLAY (LCD):
Most common LCDs connected to the microcontrollers are 16x2
and 20x2 displays.
This means 16 characters per line by 2 lines and 20 characters per
line by 2 lines, respectively.
DISPLAY UNIT

19. LCD BACKGROUND:
If an 8-bit data bus is used the LCD will require 11 data lines
(3 control lines plus the 8 lines for the data bus)
The three control lines are referred to as EN, RS, and RW
EN=Enable (used to tell the LCD that you are sending it data)
RS=Register Select (When RS is low (0), data is treated as a command)
(When RS is High(1), data being sent is text data )
R/W=Read/Write (When RW is low (0), the data written to the LCD)
(When RW is high (1), the data reading to the LCD)

20. SOFTWARE REQUIREMENTS
Keil an ARM Company makes C compilers, macro assemblers,
real-time kernels, debuggers, simulators, integrated environments,
evaluation boards, and emulators for ARM7/ARM9/Cortex-M3,
XC16x/C16x/ST10, 251, and 8051 MCU families.
Compilers are programs used to convert a High Level Language
to object code. Desktop compilers produce an output object code for
the underlying microprocessor, but not for other microprocessors
KEIL COMPILER:

21. SNAP SHOT:

22. MERITS:
1]By adopting this we can avoid illegal usage of
current
2]continuous monitoring of ac load as per our
requirement either ON (or)OFF
3]There is not need of sending any member to
come to our houses for billing
4]we can generate instant billing in fixed interval
of time