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The programming for microcontroller is done using the Keil software. The Keil software provides IDE platform to levelop the ARM based applications. Keil provide both modes to write the programme i.e. Assembly and Embedded C. The developed circuit diagram and its simulation in proteus software are shown below: Keil software is used for the Programing of controller. The program is written in Embedded C. Program is compiled, Debuc and hex file is created using Keil software. The hex file is burned in controller using Flash Magic software. Algorithm for prepaid energy meter is given below:

Figure 2 The programming for microcontroller is done using the Keil software. The Keil software provides IDE platform to levelop the ARM based applications. Keil provide both modes to write the programme i.e. Assembly and Embedded C. The developed circuit diagram and its simulation in proteus software are shown below: Keil software is used for the Programing of controller. The program is written in Embedded C. Program is compiled, Debuc and hex file is created using Keil software. The hex file is burned in controller using Flash Magic software. Algorithm for prepaid energy meter is given below:

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The ARM7TDMI-S is a general purpose 32-bit microprocessor, which offers high performance and very low pows consumption. ARM architecture is based on Reduced Instruction Set Computer (RISC) principles, and the instruction set an related decode mechanism is much simpler than those of micro programed Complex Instruction Set Computers (CISC LPC2148 microcontroller is used to control all the peripherals interfaced with it. GSM modem is used to provide the mediu: of communication between the user and service provider. GSM is configured and control by the AT commands. Relay is use to establish to connection between load and main power supply. LCD which is used in 8-bit mode to display the status « recharge units continuously. An Electrically Erasable Programmable Read-Only Memory (EEPROM) is used to store tl current no units remaining.A nenergy or electric meter is a device that measures the amount of electrical energy consumed by residence, business, or an electrically-powered device. Electric meters are typically calibrated in billing units, the mo common one being the kilowatt hour. EO en Tot use the system again the user sr has to reload the units by recharging the system. Theuser has to send the message through the registered mobile number to GSM modem. A fter successful recharge, the load automatically gets ON, and the system will be loaded with the units corresponding to that recharge value. This system uses 5V regulated power supply for the microcontroller. The Main power supply (230V 50Hz) given to the relay to turn on the load.
The ARM7TDMI-S is a general purpose 32-bit microprocessor, which offers high performance and very low pows consumption. ARM architecture is based on Reduced Instruction Set Computer (RISC) principles, and the instruction set an related decode mechanism is much simpler than those of micro programed Complex Instruction Set Computers (CISC LPC2148 microcontroller is used to control all the peripherals interfaced with it. GSM modem is used to provide the mediu: of communication between the user and service provider. GSM is configured and control by the AT commands. Relay is use to establish to connection between load and main power supply. LCD which is used in 8-bit mode to display the status « recharge units continuously. An Electrically Erasable Programmable Read-Only Memory (EEPROM) is used to store tl current no units remaining.A nenergy or electric meter is a device that measures the amount of electrical energy consumed by residence, business, or an electrically-powered device. Electric meters are typically calibrated in billing units, the mo common one being the kilowatt hour. EO en Tot use the system again the user sr has to reload the units by recharging the system. Theuser has to send the message through the registered mobile number to GSM modem. A fter successful recharge, the load automatically gets ON, and the system will be loaded with the units corresponding to that recharge value. This system uses 5V regulated power supply for the microcontroller. The Main power supply (230V 50Hz) given to the relay to turn on the load.
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