Notes on GSM Based Prepaid Electricity Energy Meter Project

Project Overview

Title: GSM Based Prepaid Electricity Energy Meter using Arduino and Power Theft Alert System.
Key Components:
- Arduino Uno R3
- GSM SIM800L Module
- Energy Meter
- LCD Display (16x2 Character LCD)
- SPDT Relay
- LM358 Operational Amplifier
- 9V Power Supply Adapter

Power Theft Detection:
- A switch (talk to switch) activates when the box is opened.
- If the switch is open, it indicates power theft; an SMS alert is sent.
- SMS format: "Power theft detected; recharge is 100 rupees, 200 rupees, etc."
LCD Display:
- Displays ongoing processes and power supply status.
GSM Communication:
- Connected via RX (0) and TX (1) pins.
- Uses various SIM cards (Idea, Airtel, Vodafone, BSNL).
- Alerts sent for low balance and power theft.

GSM SIM800L: Handles SMS functionalities.
SPDT Relay: Controls energy meter and AC bulb load.
LM358 Operational Amplifier: Receives signals and outputs them in analog form to ADC (A0).
Power Supply: 9V adapter used to power the circuit.

Balance Notifications:
- Sends SMS when balance goes low or is depleted:
  - "Low balance, please recharge."
  - "No balance, power cut."
Power Theft Alerts:
- SMS sent when power theft is detected.
- Example SMS: "Power theft detected; meter number 1503."

Recharge Command Format:
- Example format: S.RC 100* to recharge with 100 rupees.
Confirmation SMS sent upon successful recharge: "Recharge amount 100 rupees is successful."

Starting the System:
- GSM modem checks for messages, deletes old messages.
- Balance display and notifications for theft detection.
Testing Power Theft:
- Demonstrated the switch for power theft detection.
- Received alerts based on simulated theft conditions.
Energy Usage Monitoring:
- Balance decreases as energy is consumed.
- Automatic disconnection on balance depletion.

System effectively combines GSM technology with prepaid energy monitoring and theft detection.
Offers real-time alerts and updates via SMS for user awareness.