P RESENTATION ON ELECTRICITY METER USINGSM

ABSTRACT THE METER READING BY MANPOWER Inefficient system of billing and collection Less efficient, error prone and costly THE METER READING USING GSM Provides billing details on merely sending a text message Project comprises of GSM module SIM-300 Microcontroller AT89C51 with energy meter to read the units

OBJECTIVES Upon completion, we would like our meter to be able to do the following things: Measure electricity consumption accurately. Display account balance. Communicate with the user using GSM module Warn the user of low account balance Cut power off when there is zero credit on the account.

INTRODUCTION Present power usage reading is done manually Requires large no of labour operators Long working hours to accomplish the work Printed billing may get lost Delayed due to bad weather Prone to error Through GSM Electricity used is calculated by energy meter Passed to microcontroller(8051) Then to GSM modem Whole process is fast and error free

Meter Interface : Contains the digital or analog electricity meter as appropriate for us on the basis of circuit requirement and cost. Central Office Equipment: Consists of a single PCB, which converts CF(constant frequency) pulses of Electronic Energy Meters to Electrical pulses, accumulate them and generate a meter reading with help of Microcontroller. Communication System: Single stage communication between Meter and central station through GSM 300 module which are available in the market

BLOCK DIAGRAM

COMPONENT USED Microcontroller AT89C51 (8051 family) GSM module SIM 300 Crystal Oscillator MHz Capacitors MAX2332 RS232 (DB9 CONNECTOR) Electric meter Power supply Load (Electric Bulb ) Resistors SOFTWARE USED Keil Proteus

Language used: C or Assembly language. AT commands

POWER SUPPLY Brief description of operation: Gives out well regulated +5V output, output current capability of 100 mA Circuit complexity: Very simple and easy to build Circuit performance: Very stable +5V output voltage, reliable operation Availability of components: Easy to get, uses only very common basic components

PROPOSED CIRCUIT DIAGRAM

ELECTRICITY METER An electricity meter or energy meter is a device that measures the amount of electric energy consumed by a residence, business or an electrically powered device. Electricity meters are typically calibrated in billing units, the most common one being the kilowatt hour (kWh). "Time of day" metering allows electric rates to be changed during a day, to record usage during peak high-cost periods and off-peak, lower-cost, periods.

MICROCONTROLLER Using 89C51 microcontroller MAX232,Meter and power supply is interfaced with the microcontroller WHY 89C51? Meeting the computing needs of the task efficiently and cost effectively Availability of software development tools

FEATURES 4K Bytes of In-System Reprogrammable Flash Memory(ROM) Fully Operation: 0 Hz to 24 MHz 128 x 8-bit Internal RAM 32 Programmable I/O Lines Two 16-bit Timer/Counters Six Interrupt Sources Programmable Serial Channel

RS 232 Earlier RS232 was termed as EIA232F Was used as a standard port for communication between different devices. Can be defined as point to point communication between the (DTE) and (DCE). Called a serial port Comes in two different variants of D-style 9 pin(DB 9 connector ) 25 pin(DB 25 connector ) Only three pins are required for communication

MAX 232 MAX232 is one of the components that solves many signal conversion problems. This chip converts RS232 signal voltage levels to TTL voltage levels and vice-versa. A microcontroller circuit that require a PC connection or with modem then this is the chip that is needed to make that communication happen.

GSM MODULE

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. GSM modems are most frequently used to provide mobile internet connectivity. GSM modems can be a quick and efficient way to get started with SMS.

KEY FEATURES OF SIM300 FEATURE IMPLEMENTATION Power SupplySingle supply voltage 3.4V – 4.5V Power SavingTypical power consumption in SLEEP mode to 2.5mA Frequency Bands  SIM300 Tri-band: EGSM 900, DCS 1800, PCS The band can be set by AT COMMAND, and default band is EGSM 900 and DCS  Compliant to GSM Phase 2/2+ GSM ClassSmall MS

GSM NETWORK The Switching System(SS) HLR(Home location register) MSC(Mobile service switching center) VLR(Visitor location register) AUC(Authentication center) EIR(Equipment identity register) MXE(Message center) MSN(Mobile service node) The Base Station System (BSS) BSC(Base station contoller ) BTS(Base transceiver station)

GSM NETWORK

SOFTWARE IMPLEMENTATION Initially serial data rate is set to 9600 GSM module is initialized Accuracy of GSM modem is tested SMS sent by the user is read Validity of the number is checked As soon as SMS is received an indication for reception is given SMS is received in cell phone indicating that we should make recharge as available balance is very less. Space is made available for new data that is to be received by clearing the old

A LGORITHM Step1. Connect GSM module to electric meter. Step2. Initiate baud rate and set it to Step3. GSM module is initialized. Step4. User punches his/her number for connecting to his/her energy meter. Step5. The number is then validated. Step7. The data is collected stored in EEPROM. Step8. Bill is sent to users cell phone in the received message. Step9. The user on receiving the message recharges through his/her phone. Step10. Stop

AT COMMANDS Derived from the Hayes Command set Set of command-language or instructions Common AT commands include ATD -to instruct the cellular module to make a phone call AT+CMGS -to send a SMS text message AT+GCACT -to get an Internet Protocol (IP) address to start an IP data session Can perform tasks like Reading, writing and deleting SMS messages Sending MS messages Monitoring signal strength Monitoring the charging status Charging level of the battery

E XPECTED R ESULT SMS send to meter side from customer SMS received by customer from meter Current meter reading of the customer of each day Monthly calculated bill details SMS

A DVANTAGES Accurate meter reading and billing The consumer is free from maintaining past records The man power is decreased considerably Avoiding the problem of tariff collection No detecting of tampering and theft of power Supports good quality No delay No conversation is required GSM technology makes the working more effective

CONCLUSION Proposed methodology is used to generate prepaid card for usage of electricity Generates the message to the consumers either by day basis or weekly basis as per consumer requirements Will minimize the wastage of electricity and saves the power for future generation GSM network provides Efficient wireless automatic meter reading distribution control and Making fast billing system, accurate, effective and Reduction of labor cost of operation