Prepaid and Postpaid Energy Meter for Billing System Using Microcontroller and GSM

In this paper smart energy meter with GSM model for prepaid and postpaid system is proposed. Due to this system the user has ability to select prepaid or postpaid mode as per his/her requirement. In prepaid mode balance is reduced as per energy is consumed. When the balance is low user gets a "Balance is low" message. If balance reaches to zero then with the help of relay power automatically gets cut off. If the account is recharged then the user gets uninterrupted power supply. In postpaid system with the help of GSM module MSEB gets the message of how much units a particular user is used and according to that data MSEB sends bill by post.

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