Project Proposal Meter Reading Through Pstn Line

ABSTRACT

In today’s modern era, means of communication is developing day by day with the added features. Further enhancement, compatible and economical must be the property of the project. Telephony is one of the most widely used means of fast and the reliable communication. Keeping this in mind we have put forward the data transmission project in the PSTN lines.

The project entitled “Meter Reading through PSTN Line” is an intelligent system which can be used to measure, record, and display the data of electricity consumption, from the central office. We use the interface card to measure the units of electricity consumed by every subscriber in his household. The pulse signal obtaining from the electric meter is counted for the purpose of recording the units. The recorded digital data stored in the interface card must be transmitted to the central office when it detects a valid call from the central office. A caller id system is required to detect the call whether it is originated from the central office or somewhere else. Our project is fully embedded system based and all the control actions are performed using the microcontrollers including caller id detection, relay switching, auto hook off, counting the meter pulses, and driving the DTMF circuits of the PSTN line. Simply it is the master device to perform all the necessary action. Further we can easily program the device in assembly as well as high level language like C. The data received in the central office is displayed on the LCD. And finally those digital data obtained in central office are used for displaying, storing and manipulated for the billing purpose.